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class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/docs/releases">Release History</a></div></li></ul></nav></div></div></aside><main class="docMainContainer_gTbr"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="Breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">Advanced Guides</span><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">API Tracing</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: Next</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>API Tracing</h1><h2 class="anchor anchorWithStickyNavbar_LWe7" id="introduction">Introduction<a href="#introduction" class="hash-link" aria-label="Direct link to Introduction" title="Direct link to Introduction"></a></h2><p>DataHub's asynchronous APIs enable high-volume data operations, particularly for bulk ingestion processes. While these
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APIs optimize throughput, they previously lacked built-in validation mechanisms for operation status. Consequently,
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detecting processing issues required direct monitoring of backend system metrics and logs.</p><p>To address this limitation, DataHub implemented a trace/request ID system that enables end-to-end tracking of write
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operations. This tracing mechanism is particularly crucial given DataHub's multi-stage write architecture, where data
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propagates through multiple components and persists across distinct storage systems. The trace ID maintains continuity
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throughout this complex processing pipeline, providing visibility into the operation's status at each stage of execution.</p><p>The system effectively balances the performance benefits of asynchronous processing with the operational necessity of
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request tracking and validation. This enhancement significantly improves observability without compromising the
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||
throughput advantages of bulk operations.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="architecture-overview">Architecture Overview<a href="#architecture-overview" class="hash-link" aria-label="Direct link to Architecture Overview" title="Direct link to Architecture Overview"></a></h2><p>Shown below is the write path for an asynchronous write within DataHub. For more information about MCPs please see
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the documentation on <a href="/docs/advanced/mcp-mcl">MetadataChangeProposal & MetadataChangeLog Events</a>.</p><p align="center"><img loading="lazy" width="90%" src="https://raw.githubusercontent.com/datahub-project/static-assets/main/imgs/advanced/mcp-mcl/async-ingestion.svg" class="img_ev3q"></p><p>A successful write operation requires data persistence in at least one storage system, though typically both primary and
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||
search storage systems must be updated. The storage architecture consists of two main components:</p><ul><li>Primary Storage: Comprises MySQL, Postgres, or Cassandra, serving as the persistent store for all non-Timeseries aspects.</li><li>Search Storage: Utilizes either Elasticsearch or OpenSearch systems.</li></ul><p>In most operational scenarios, write operations must successfully complete across both storage layers to maintain system
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||
consistency and ensure complete data availability.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="trace-api">Trace API<a href="#trace-api" class="hash-link" aria-label="Direct link to Trace API" title="Direct link to Trace API"></a></h2><p>Known Limitations:</p><ul><li>Tracing can fail in some cases where a batch of aspects introduces a conflict between a system generated aspect and one
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||
included within a batch. An example, <code>upstreamLineage</code> and <code>siblings</code> aspects together may conflict with a system generated
|
||
<code>siblings</code> aspect normally generated from <code>upstreamLineage</code> in an MCL hook.</li></ul><p>The trace API's status retrieval functionality requires three key identifiers to locate specific write operations:
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||
the trace ID (unique to the request), the URN, and the aspect name. This combination of identifiers ensures precise
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||
operation tracking within the system.</p><p>For batch operations involving multiple URNs and aspects, a single trace ID is assigned to monitor the entire request.
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In asynchronous mode, the system maintains independent status tracking for each aspect within the batch, allowing for
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||
granular operation monitoring.</p><p>The API returns a comprehensive status report that includes:</p><ul><li>Per-aspect success/failure status</li><li>Detailed status breakdowns for each storage system</li><li>Write states as defined in the <a href="#Write-States">Write States</a> documentation</li><li>Error information from MCP processing, when applicable, to facilitate debugging</li></ul><p>This structured approach to status reporting enables precise monitoring of complex write operations across the system's
|
||
various components.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="retrieving-the-trace-id">Retrieving the <code>trace id</code><a href="#retrieving-the-trace-id" class="hash-link" aria-label="Direct link to retrieving-the-trace-id" title="Direct link to retrieving-the-trace-id"></a></h3><p>DataHub's asynchronous APIs provide trace ID information through two distinct mechanisms:</p><ul><li>HTTP Response Header: A W3C-compliant <code>traceparent</code> header is included in all API responses
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||
The complete header value serves as a valid trace ID</li><li>System Metadata: For OpenAPI v3 APIs and those returning systemMetadata, the trace ID is accessible via the
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||
<code>telemetryTraceId</code> property within systemMetadata</li></ul><p>While these two trace ID formats differ structurally—with the <code>traceparent</code> adhering to W3C's Trace Context
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||
specification—both formats are fully compatible with the Trace API for operation tracking purposes.</p><p>Header Example:</p><div class="language-text codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">traceparent: 00-00062c53a468cbd8077e7dd079846870-9199effb49910b4e-01</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p><code>SystemMetadata</code> Example:</p><div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"urn"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"urn:li:dataset:(urn:li:dataPlatform:hive,fct_users_created,PROD)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"status"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"value"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"removed"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token boolean" style="color:rgb(255, 88, 116)">false</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"systemMetadata"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"properties"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"telemetryLog"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"false"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"telemetryQueueSpanId"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"ee9e40edcb66ce4f"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"telemetryTraceId"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"00062c53a468cbd8077e7dd079846870"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"telemetryEnqueuedAt"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"1737587612508"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">]</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="write-states">Write States<a href="#write-states" class="hash-link" aria-label="Direct link to Write States" title="Direct link to Write States"></a></h3><p>As mentioned earlier, there are multiple states for an aspect write both storage systems. These states are as follows:</p><table><thead><tr><th>Write State</th><th>Description</th></tr></thead><tbody><tr><td><code>ERROR</code></td><td>This state indicates an error occurred when processing the write request.</td></tr><tr><td><code>PENDING</code></td><td>A pending state indicates that the write is queued and the consumer has not yet processed the message.</td></tr><tr><td><code>ACTIVE_STATE</code></td><td>The write was successful and is the current value.</td></tr><tr><td><code>HISTORIC_STATE</code></td><td>The write was successful, however it has been overwritten by a newer value.</td></tr><tr><td><code>NO_OP</code></td><td>The write is not applicable for a given storage system.</td></tr><tr><td><code>UNKNOWN</code></td><td>We are unable to determine the state of the write and no record of its failure exists either.</td></tr><tr><td><code>TRACE_NOT_IMPLEMENTED</code></td><td>We have not yet implemented tracing a particular aspect type. This applies to Timeseries aspects.</td></tr></tbody></table><h3 class="anchor anchorWithStickyNavbar_LWe7" id="using-the-trace-api">Using the Trace API<a href="#using-the-trace-api" class="hash-link" aria-label="Direct link to Using the Trace API" title="Direct link to Using the Trace API"></a></h3><p>The Trace API is implemented as an OpenAPI endpoint and can be used both programmatically and through the Swagger UI.</p><p>Required Values:</p><ul><li><code>traceId</code> - The <code>trace id</code> associated with the write request. See the previous <a href="#retrieving-the-trace-id">Retrieving the <code>trace id</code></a> section for how to find this id.</li><li>URN/Aspect names - These are passed as a POST body and should represent at least a subset of the URN/aspects from the initial request.
|
||
An example is shown here for a single URN and 2 aspects <!-- -->[<code>datasetInfo</code>, <code>status</code>]<!-- -->.<div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"urn:li:dataset:(urn:li:dataPlatform:bigquery,transactions.user_profile,PROD)"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"datasetInfo"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"status"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">]</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li>Authorization token</li></ul><p>Optional Parameters:</p><ul><li><code>onlyIncludeErrors</code> (default: <code>true</code>) - If this parameter is set to <code>true</code>, the response will only include status information on the failed aspects.</li><li><code>detailed</code> (default: <code>false</code>) - If set to <code>true</code>, will include detailed information from exceptions for failed MCPs.</li><li><code>skipCache</code> (default: <code>false</code>) - If set to <code>true</code>, will bypass a short-lived cache of the kafka consumer group offsets.</li></ul><p>The following shows a few examples of requests/response pairs.</p><ul><li>Successful Write<ul><li>Request for URN <code>urn:li:dataset:(urn:li:dataPlatform:bigquery,transactions.user_profile,PROD)</code> and aspect <code>status</code><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token function" style="color:rgb(130, 170, 255)">curl</span><span class="token plain"> -v </span><span class="token string" style="color:rgb(195, 232, 141)">'http://localhost:8080/openapi/v1/trace/write/00062c2b698bcb28e92508f8f311802d?onlyIncludeErrors=false&detailed=true&skipCache=false'</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -H </span><span class="token string" style="color:rgb(195, 232, 141)">'accept: application/json'</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -H </span><span class="token string" style="color:rgb(195, 232, 141)">'Content-Type: application/json'</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -H </span><span class="token string" style="color:rgb(195, 232, 141)">'Authorization: Bearer <TOKEN>'</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -d </span><span class="token string" style="color:rgb(195, 232, 141)">'{</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token string" style="color:rgb(195, 232, 141)"> "urn:li:dataset:(urn:li:dataPlatform:bigquery,transactions.user_profile,PROD)": [</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token string" style="color:rgb(195, 232, 141)"> "status"</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token string" style="color:rgb(195, 232, 141)"> ]</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token string" style="color:rgb(195, 232, 141)">}'</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">|</span><span class="token plain"> jq</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li>Example response<div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"urn:li:dataset:(urn:li:dataPlatform:bigquery,transactions.user_profile,PROD)"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"status"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"success"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token boolean" style="color:rgb(255, 88, 116)">true</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"primaryStorage"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"writeStatus"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"ACTIVE_STATE"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"searchStorage"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"writeStatus"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"ACTIVE_STATE"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li></ul></li><li>Error with exception details<ul><li>Example request<div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token function" style="color:rgb(130, 170, 255)">curl</span><span class="token plain"> -v </span><span class="token string" style="color:rgb(195, 232, 141)">'http://localhost:8080/openapi/v1/trace/write/00062c543e4550c8400e6f6864471a20?onlyIncludeErrors=true&detailed=true&skipCache=false'</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -H </span><span class="token string" style="color:rgb(195, 232, 141)">'accept: application/json'</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -H </span><span class="token string" style="color:rgb(195, 232, 141)">'Content-Type: application/json'</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -H </span><span class="token string" style="color:rgb(195, 232, 141)">'Authorization: Bearer <TOKEN>'</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> -d </span><span class="token string" style="color:rgb(195, 232, 141)">'{"urn:li:dataset:(urn:li:dataPlatform:bigquery,transactions.user_profile,PROD)": ["status"]}'</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li>Example response<div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"urn:li:dataset:(urn:li:dataPlatform:bigquery,transactions.user_profile,PROD)"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"status"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"success"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token boolean" style="color:rgb(255, 88, 116)">false</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"primaryStorage"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"writeStatus"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"ERROR"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"writeExceptions"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"message"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"Expected version -100000, actual version -1"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"exceptionClass"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"com.linkedin.metadata.aspect.plugins.validation.AspectValidationException"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"stackTrace"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"com.linkedin.metadata.aspect.plugins.validation.AspectValidationException.forPrecondition(AspectValidationException.java:33)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"com.linkedin.metadata.aspect.plugins.validation.AspectValidationException.forPrecondition(AspectValidationException.java:25)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"com.linkedin.metadata.aspect.validation.ConditionalWriteValidator.validateVersionPrecondition(ConditionalWriteValidator.java:152)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"com.linkedin.metadata.aspect.validation.ConditionalWriteValidator.lambda$validatePreCommitAspects$2(ConditionalWriteValidator.java:100)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"java.base/java.util.Optional.flatMap(Optional.java:289)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"com.linkedin.metadata.aspect.validation.ConditionalWriteValidator.validatePreCommitAspects(ConditionalWriteValidator.java:98)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"com.linkedin.metadata.aspect.plugins.validation.AspectPayloadValidator.validatePreCommit(AspectPayloadValidator.java:38)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"com.linkedin.metadata.aspect.batch.AspectsBatch.lambda$validatePreCommit$4(AspectsBatch.java:129)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:273)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"com.linkedin.metadata.aspect.batch.AspectsBatch.validatePreCommit(AspectsBatch.java:130)"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">]</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">]</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"searchStorage"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"writeStatus"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"ERROR"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"writeMessage"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"Primary storage write failed."</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li></ul></li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="ingestion-tracing-experimental">Ingestion Tracing (Experimental)<a href="#ingestion-tracing-experimental" class="hash-link" aria-label="Direct link to Ingestion Tracing (Experimental)" title="Direct link to Ingestion Tracing (Experimental)"></a></h3><p>Known Limitations:</p><ul><li>Only OpenAPI is supported</li><li>ASYNC_WAIT/ASYNC - Async modes are impacted by kafka lag.</li></ul><p>Ingestion can be used with tracing enabled however it does require using a <code>ASYNC_WAIT</code> emit mode as well as the <code>OPENAPI</code>. This
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can be enabled by setting a couple environment variables shown below.</p><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">DATAHUB_REST_SINK_DEFAULT_ENDPOINT</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">OPENAPI </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">DATAHUB_EMIT_MODE</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">ASYNC_WAIT </span><span class="token punctuation" style="color:rgb(199, 146, 234)">\</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> datahub ingest </span><span class="token punctuation" style="color:rgb(199, 146, 234)">..</span><span class="token plain">.</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="trace-performance">Trace Performance<a href="#trace-performance" class="hash-link" aria-label="Direct link to Trace Performance" title="Direct link to Trace Performance"></a></h2><p>The Trace API's performance profile varies based on operation status:</p><p>Successful Operations:</p><ul><li>Optimal performance through direct storage access</li><li>Requires single lookup operations from SQL and Elasticsearch</li><li>Bypasses Kafka interaction entirely</li></ul><p>Error State Operations:</p><ul><li>Performance impact due to required Kafka topic inspection<ul><li>Optimization mechanisms implemented:<ul><li>Timestamp-based offset seeking for efficient topic traversal</li><li>Parallel trace processing with controlled concurrency</li><li>Offset caching system to enhance response times<ul><li>Cache bypass available via skipCache parameter when data currency is critical</li></ul></li></ul></li></ul></li></ul><p>The performance differential between success and error states stems primarily from the additional overhead of Kafka
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||
topic inspection required for error tracking and diagnosis.</p><p>For more detail, please see the <a href="#design-notes">Design Notes</a> section.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="real-world-test">Real World Test<a href="#real-world-test" class="hash-link" aria-label="Direct link to Real World Test" title="Direct link to Real World Test"></a></h3><p>A test was executed with 627,712 aspects in <code>ASYNC_BATCH</code> and averaged over 2 runs. The overhead from tracing introduced
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||
a 3.84% increase in runtime. Example test runs shown below.</p><p>Without Tracing:</p><div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"total_records_written"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">627712</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"records_written_per_second"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">376</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"total_duration_in_seconds"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">1665.25</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"mode"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"ASYNC_BATCH"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"max_threads"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">15</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"gms_version"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"v0.3.9.3"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"pending_requests"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">0</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"async_batches_prepared"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">6290</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"async_batches_split"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">0</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"main_thread_blocking_timer"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"1186.301 seconds"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>With Tracing:</p><div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"total_records_written"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">627612</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"records_written_per_second"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">368</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"total_duration_in_seconds"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">1701.51</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"mode"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"ASYNC_BATCH"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"max_threads"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">15</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"gms_version"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"v0.3.9.3"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"pending_requests"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">0</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"async_batches_prepared"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">6291</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"async_batches_split"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">0</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"main_thread_blocking_timer"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"1224.738 seconds"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="trace-exporters">Trace Exporters<a href="#trace-exporters" class="hash-link" aria-label="Direct link to Trace Exporters" title="Direct link to Trace Exporters"></a></h2><p>At the foundation of the trace instrumentation is OpenTelemetry which has been a part of DataHub for quite some time. As
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documented in the <a href="/docs/advanced/monitoring">Monitoring</a> section, OpenTelemetry can be configured to export traces
|
||
to external systems. For the Trace API to function, this external system is NOT required.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="trace-log-export">Trace Log Export<a href="#trace-log-export" class="hash-link" aria-label="Direct link to Trace Log Export" title="Direct link to Trace Log Export"></a></h3><p>A special log-based OpenTelemetry exporter was implemented for debugging purposes. When selectively activated for a given
|
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request it will print <code>trace id</code>s and detailed timing information as the request traverses the different components of DataHub.
|
||
The output of these logs is also not required for the Trace API to function, however it leverages the same underlying OpenTelemetry
|
||
foundation.</p><p>Activating a trace log is done using one of these methods:</p><ul><li>HTTP Header: <code>X-Enable-Trace-Log: true</code></li><li>Cookie: <code>enable-trace-log: true</code><ul><li>javascript: <code>document.cookie = "enable-trace-log=true";</code></li></ul></li></ul><p>Example logs for a single request with tracing logging enabled:</p><ul><li>GMS</li></ul><div class="language-text codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.RequestContext:53 - RequestContext{actorUrn='urn:li:corpuser:datahub', sourceIP='172.18.0.5', requestAPI=OPENAPI, requestID='createAspect([dataset])', userAgent='Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36'}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: a2898a18f9f0c4f1, ParentId: dd746f079d1232ba, Name: ingestTimeseriesProposal, Duration: 0.03 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={async=true, batch.size=1}, capacity=128, totalAddedValues=2}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 02e058ff616e4c99, ParentId: 7ed88659811a8fdb, Name: produceMetadataChangeProposal, Duration: 0.03 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={messaging.destination_kind=topic, messaging.system=kafka, messaging.destination=MetadataChangeProposal_v1, messaging.operation=publish, queue.enqueued_at=1737418391958}, capacity=128, totalAddedValues=5}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 7ed88659811a8fdb, ParentId: dd746f079d1232ba, Name: ingestProposalAsync, Duration: 2.57 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={batch.size=1}, capacity=128, totalAddedValues=1}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><ul><li>MCE Consumer</li></ul><div class="language-text codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.m.k.MetadataChangeProposalsProcessor:89 - Got MCP event key: urn:li:dataset:(urn:li:dataPlatform:snowflake,climate.daily_temperature,PROD), topic: MetadataChangeProposal_v1, partition: 0, offset: 75, value size: 412, timestamp: 1737418391959</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: a65075fe0982d873, ParentId: 02e058ff616e4c99, Name: consume, Duration: 0.01 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={messaging.destination_kind=topic, queue.duration_ms=4, messaging.system=kafka, messaging.destination=MetadataChangeProposal_v1, messaging.operation=receive, queue.enqueued_at=1737418391958}, capacity=128, totalAddedValues=6}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: dd746f079d1232ba, ParentId: 0000000000000000, Name: POST /openapi/v3/entity/dataset/urn%3Ali%3Adataset%3A%28urn%3Ali%3AdataPlatform%3Asnowflake%2Cclimate.daily_temperature%2CPROD%29/status, Duration: 16.18 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={request.api=OPENAPI, http.status_code=202, user.id=urn:li:corpuser:datahub, http.url=/openapi/v3/entity/dataset/urn%3Ali%3Adataset%3A%28urn%3Ali%3AdataPlatform%3Asnowflake%2Cclimate.daily_temperature%2CPROD%29/status, request.id=createAspect([dataset]), http.method=POST}, capacity=128, totalAddedValues=6}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 94a019b95154c0e7, ParentId: 0cb378fe4f5ad185, Name: ingestProposalSync, Duration: 0.01 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={batch.size=0}, capacity=128, totalAddedValues=1}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 0cb378fe4f5ad185, ParentId: 68df6bc4729dc0a2, Name: ingestTimeseriesProposal, Duration: 0.25 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={async=false, batch.size=1}, capacity=128, totalAddedValues=2}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.m.entity.EntityServiceImpl:988 - Ingesting aspects batch to database: AspectsBatchImpl{items=[ChangeMCP{changeType=UPSERT, urn=urn:li:dataset:(urn:li:dataPlatform:snowflake,climate.daily_temperature,PROD), aspectName='status', recordTemplate={removed=false}, systemMetadata={lastObserved=1737418391954, version=1, properties={telemetryLog=true, telemetryQueueSpanId=02e058ff616e4c99, telemetryEnqueu...}]}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 4754a1c02dadec4c, ParentId: ef383b26f0040fc5, Name: retentionService, Duration: 0.09 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={batch.size=1}, capacity=128, totalAddedValues=1}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: ef383b26f0040fc5, ParentId: 7ae629151400fc18, Name: ingestAspectsToLocalDB, Duration: 18.64 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={batch.size=1, dwizName=com.linkedin.metadata.entity.EntityServiceImpl.ingestAspectsToLocalDB}, capacity=128, totalAddedValues=2}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.m.entity.EntityServiceImpl:1900 - Producing MCL for ingested aspect status, urn urn:li:dataset:(urn:li:dataPlatform:snowflake,climate.daily_temperature,PROD)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: f1a8a1da99f1ae23, ParentId: c5f8b3884060722c, Name: produceMetadataChangeLog, Duration: 0.10 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={messaging.destination_kind=topic, messaging.system=kafka, messaging.destination=MetadataChangeLog_Versioned_v1, messaging.operation=publish, queue.enqueued_at=1737418391982}, capacity=128, totalAddedValues=5}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: c5f8b3884060722c, ParentId: 7ae629151400fc18, Name: emitMCL, Duration: 14.32 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={batch.size=1}, capacity=128, totalAddedValues=1}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 7ae629151400fc18, ParentId: 68df6bc4729dc0a2, Name: ingestProposalSync, Duration: 37.90 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={batch.size=1}, capacity=128, totalAddedValues=1}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.m.k.MetadataChangeProposalsProcessor:128 - Successfully processed MCP event urn: urn:li:dataset:(urn:li:dataPlatform:snowflake,climate.daily_temperature,PROD)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 68df6bc4729dc0a2, ParentId: 02e058ff616e4c99, Name: consume, Duration: 39.11 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={batch.size=1, dwizName=com.linkedin.metadata.kafka.MetadataChangeProposalsProcessor.consume}, capacity=128, totalAddedValues=2}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 04dc44653b634df2, ParentId: 02e058ff616e4c99, Name: consume, Duration: 0.03 ms</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><ul><li>MAE Consumer</li></ul><div class="language-text codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={messaging.destination_kind=topic, queue.duration_ms=22, messaging.system=kafka, messaging.destination=MetadataChangeLog_Versioned_v1, messaging.operation=receive, queue.enqueued_at=1737418391982}, capacity=128, totalAddedValues=6}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.metadata.kafka.MCLKafkaListener:96 - Invoking MCL hooks for consumer: generic-mae-consumer-job-client urn: urn:li:dataset:(urn:li:dataPlatform:snowflake,climate.daily_temperature,PROD), aspect name: status, entity type: dataset, change type: UPSERT</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 3c3c055c360dc8e4, ParentId: 1de99215a0e82697, Name: FormAssignmentHook, Duration: 0.06 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={dwizName=com.linkedin.metadata.kafka.MCLKafkaListener.FormAssignmentHook_latency}, capacity=128, totalAddedValues=1}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 8e238d0156baacc4, ParentId: 1de99215a0e82697, Name: IngestionSchedulerHook, Duration: 0.05 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={dwizName=com.linkedin.metadata.kafka.MCLKafkaListener.IngestionSchedulerHook_latency}, capacity=128, totalAddedValues=1}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.m.s.e.update.ESBulkProcessor:85 - Added request id: urn%3Ali%3Adataset%3A%28urn%3Ali%3AdataPlatform%3Asnowflake%2Cclimate.daily_temperature%2CPROD%29, operation type: UPDATE, index: datasetindex_v2</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.m.s.e.update.ESBulkProcessor:85 - Added request id: SIHRXj1ktF7qkwPBZO8w0A==, operation type: UPDATE, index: system_metadata_service_v1</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.m.s.e.update.ESBulkProcessor:85 - Added request id: 2p3742l4sFS3wcL82Qh2lQ==, operation type: UPDATE, index: system_metadata_service_v1</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.m.s.e.update.ESBulkProcessor:85 - Added request id: CfZKRLsf25/e3p3mURzlnA==, operation type: UPDATE, index: system_metadata_service_v1</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.m.s.e.update.ESBulkProcessor:85 - Added request id: 8tvhG5ARd5BOdEbqaZkE0g==, operation type: UPDATE, index: system_metadata_service_v1</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.m.s.e.update.ESBulkProcessor:85 - Added request id: rAvQOOBItiKAym622S4dcQ==, operation type: UPDATE, index: system_metadata_service_v1</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.m.s.e.update.ESBulkProcessor:85 - Added request id: YqT6TNy7MAMOAyVXh6abMA==, operation type: UPDATE, index: system_metadata_service_v1</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 054ac726204b449c, ParentId: 1de99215a0e82697, Name: UpdateIndicesHook, Duration: 47.31 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={dwizName=com.linkedin.metadata.kafka.MCLKafkaListener.UpdateIndicesHook_latency}, capacity=128, totalAddedValues=1}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 14d9ded49a94c7b8, ParentId: 1de99215a0e82697, Name: IncidentsSummaryHook, Duration: 0.09 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={dwizName=com.linkedin.metadata.kafka.MCLKafkaListener.IncidentsSummaryHook_latency}, capacity=128, totalAddedValues=1}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: a92d9e54ade6073b, ParentId: 1de99215a0e82697, Name: EntityChangeEventGeneratorHook, Duration: 9.10 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={dwizName=com.linkedin.metadata.kafka.MCLKafkaListener.EntityChangeEventGeneratorHook_latency}, capacity=128, totalAddedValues=1}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: c06dc7f131e57fca, ParentId: 1de99215a0e82697, Name: SiblingAssociationHook, Duration: 0.07 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={dwizName=com.linkedin.metadata.kafka.MCLKafkaListener.SiblingAssociationHook_latency}, capacity=128, totalAddedValues=1}</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">c.l.metadata.kafka.MCLKafkaListener:139 - Successfully completed MCL hooks for consumer: generic-mae-consumer-job-client urn: urn:li:dataset:(urn:li:dataPlatform:snowflake,climate.daily_temperature,PROD)</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:366 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, SpanId: 1de99215a0e82697, ParentId: 02e058ff616e4c99, Name: consume, Duration: 58.67 ms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">i.d.metadata.context.TraceContext:376 - Trace: 00062c2c3e1403109bbaf3d2e39adcd0, Attributes: AttributesMap{data={batch.size=1, dwizName=com.linkedin.metadata.kafka.MCLKafkaListener.consume}, capacity=128, totalAddedValues=2}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="design-notes">Design Notes<a href="#design-notes" class="hash-link" aria-label="Direct link to Design Notes" title="Direct link to Design Notes"></a></h2><p>For the initial implementation no specific OpenTelemetry infrastructure is required, however existing environment variables
|
||
for OpenTelemetry can continue to be used and will export the new spans if configured.</p><p>The Trace API implementation does not rely on any additional external systems or infrastructure. Due to this design
|
||
choice, the trace is determined by inspecting the 3 storage systems (Primary Storage (SQL/Cassandra), Elasticsearch/Opensearch,
|
||
Kafka topics) for the <code>trace id</code> or related timestamps.</p><p>The <code>trace id</code> is stored in systemMetadata in both SQL and ES. For ES specifically, the presence of the <code>trace id</code> in
|
||
the system metadata index is used as a proxy to determine a successful write to ES.</p><p>The tracing feature will additionally fetch messages from the kafka topics (including the failed MCP topic) for
|
||
more detailed error information. Pending states are derived from offsets of the message vs the current offsets of the
|
||
consumer groups.</p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="slackUtm_uoBr"><div class="slackUtm_uoBr"><hr>Need more help? 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