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</a><div class="searchBox_ZlJk"><button type="button" class="DocSearch DocSearch-Button" aria-label="Search"><span class="DocSearch-Button-Container"><svg width="20" height="20" class="DocSearch-Search-Icon" viewBox="0 0 20 20" aria-hidden="true"><path d="M14.386 14.386l4.0877 4.0877-4.0877-4.0877c-2.9418 2.9419-7.7115 2.9419-10.6533 0-2.9419-2.9418-2.9419-7.7115 0-10.6533 2.9418-2.9419 7.7115-2.9419 10.6533 0 2.9419 2.9418 2.9419 7.7115 0 10.6533z" stroke="currentColor" fill="none" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="DocSearch-Button-Placeholder">Search</span></span><span class="DocSearch-Button-Keys"></span></button></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="main-wrapper mainWrapper_z2l0 docsWrapper_BCFX"><button aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_sjWU" type="button"></button><div class="docPage__5DB"><main class="docMainContainer_gTbr docMainContainerEnhanced_Uz_u"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><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>Elasticsearch & OpenSearch Multi-Client Shim</h1><p>This guide explains how to use DataHub's multi-client search engine shim to support different versions of Elasticsearch and OpenSearch through a unified interface.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="overview">Overview<a href="#overview" class="hash-link" aria-label="Direct link to Overview" title="Direct link to Overview"></a></h2><p>DataHub's search client shim provides seamless support for:</p><ul><li><strong>Elasticsearch 7.17</strong></li><li><strong>Elasticsearch 8.17+</strong></li><li><strong>OpenSearch 2.x</strong> with full REST high-level client support</li></ul><p>This enables smooth migrations between different search engine versions while maintaining backward compatibility with existing DataHub deployments.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="architecture">Architecture<a href="#architecture" class="hash-link" aria-label="Direct link to Architecture" title="Direct link to Architecture"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="core-components">Core Components<a href="#core-components" class="hash-link" aria-label="Direct link to Core Components" title="Direct link to Core Components"></a></h3><p>The shim consists of several key components:</p><ol><li><strong><code>SearchClientShim</code></strong> - Main abstraction interface</li><li><strong><code>SearchClientShimFactory</code></strong> - Factory for creating appropriate client implementations</li><li><strong>Implementation Classes</strong> - Concrete implementations for each search engine:<ul><li><code>Es7CompatibilitySearchClientShim</code> - ES 7.17</li><li><code>Es8SearchClientShim</code> - ES 8.17+</li><li><code>OpenSearch2SearchClientShim</code> - OpenSearch 2.x</li></ul></li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="supported-configurations">Supported Configurations<a href="#supported-configurations" class="hash-link" aria-label="Direct link to Supported Configurations" title="Direct link to Supported Configurations"></a></h3><table><thead><tr><th>Source Engine</th><th>Target Engine</th><th>Shim Implementation</th><th>Status</th></tr></thead><tbody><tr><td>DataHub → ES 7.17</td><td>ES 7.17</td><td><code>Es7CompatibilitySearchClientShim</code></td><td>✅ Complete</td></tr><tr><td>DataHub → ES 8.17+</td><td>ES 8.17+</td><td><code>Es8SearchClientShim</code></td><td>✅ Complete</td></tr><tr><td>DataHub → OpenSearch 2.x</td><td>OpenSearch 2.x</td><td><code>OpenSearch2SearchClientShim</code></td><td>✅ Complete</td></tr></tbody></table><h2 class="anchor anchorWithStickyNavbar_LWe7" id="configuration">Configuration<a href="#configuration" class="hash-link" aria-label="Direct link to Configuration" title="Direct link to Configuration"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="environment-variables">Environment Variables<a href="#environment-variables" class="hash-link" aria-label="Direct link to Environment Variables" title="Direct link to Environment Variables"></a></h3><p>Configure the shim using these environment variables:</p><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Enable the search client shim (required)</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)">ELASTICSEARCH_SHIM_ENABLED</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Specify engine type (or use AUTO_DETECT)</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)">ELASTICSEARCH_SHIM_ENGINE_TYPE</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">AUTO_DETECT</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Options: AUTO_DETECT, ELASTICSEARCH_7, ELASTICSEARCH_8, OPENSEARCH_2</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Enable auto-detection (recommended)</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)">ELASTICSEARCH_SHIM_AUTO_DETECT</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true</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="applicationyaml-configuration">application.yaml Configuration<a href="#applicationyaml-configuration" class="hash-link" aria-label="Direct link to application.yaml Configuration" title="Direct link to application.yaml Configuration"></a></h3><p>Alternatively, configure via application.yaml:</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">elasticsearch</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 key atrule">host</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> localhost</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">port</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">9200</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">username</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> $</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain">ELASTICSEARCH_USERNAME</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">#{null}}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">password</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> $</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain">ELASTICSEARCH_PASSWORD</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic">#{null}}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">useSSL</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" 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 comment" style="color:rgb(105, 112, 152);font-style:italic"># Standard Elasticsearch configuration...</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Multi-client shim configuration</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">shim</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 key atrule">enabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Enable shim</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">engineType</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> AUTO_DETECT </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># or specific type</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">autoDetectEngine</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Auto-detect cluster type</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="migration-scenarios">Migration Scenarios<a href="#migration-scenarios" class="hash-link" aria-label="Direct link to Migration Scenarios" title="Direct link to Migration Scenarios"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="scenario-1-elasticsearch-717--elasticsearch-8x">Scenario 1: Elasticsearch 7.17 → Elasticsearch 8.x<a href="#scenario-1-elasticsearch-717--elasticsearch-8x" class="hash-link" aria-label="Direct link to Scenario 1: Elasticsearch 7.17 → Elasticsearch 8.x" title="Direct link to Scenario 1: Elasticsearch 7.17 → Elasticsearch 8.x"></a></h3><p>This is the most common migration path.</p><p><strong>Step 1: Enable the shim</strong></p><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token assign-left variable" style="color:rgb(191, 199, 213)">ELASTICSEARCH_SHIM_ENABLED</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true</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)">ELASTICSEARCH_SHIM_ENGINE_TYPE</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">ELASTICSEARCH_8</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><strong>Step 2: Verify connection</strong></p><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Check logs for successful connection</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="scenario-2-elasticsearch-717--opensearch-2x">Scenario 2: Elasticsearch 7.17 → OpenSearch 2.x<a href="#scenario-2-elasticsearch-717--opensearch-2x" class="hash-link" aria-label="Direct link to Scenario 2: Elasticsearch 7.17 → OpenSearch 2.x" title="Direct link to Scenario 2: Elasticsearch 7.17 → OpenSearch 2.x"></a></h3><p>Direct migration from Elasticsearch to OpenSearch 2.x.</p><p><strong>Configuration:</strong></p><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token assign-left variable" style="color:rgb(191, 199, 213)">ELASTICSEARCH_SHIM_ENABLED</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true</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)">ELASTICSEARCH_SHIM_ENGINE_TYPE</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">OPENSEARCH_2</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)">ELASTICSEARCH_SHIM_AUTO_DETECT</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true</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="scenario-3-auto-detection-recommended">Scenario 3: Auto-Detection (Recommended)<a href="#scenario-3-auto-detection-recommended" class="hash-link" aria-label="Direct link to Scenario 3: Auto-Detection (Recommended)" title="Direct link to Scenario 3: Auto-Detection (Recommended)"></a></h3><p>Let DataHub automatically detect your search engine type:</p><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token assign-left variable" style="color:rgb(191, 199, 213)">ELASTICSEARCH_SHIM_ENABLED</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true</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)">ELASTICSEARCH_SHIM_ENGINE_TYPE</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">AUTO_DETECT</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)">ELASTICSEARCH_SHIM_AUTO_DETECT</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true</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>The shim will:</p><ol><li>Connect to your search cluster</li><li>Identify the engine type and version</li><li>Select the appropriate client implementation</li></ol><h2 class="anchor anchorWithStickyNavbar_LWe7" id="deployment-guide">Deployment Guide<a href="#deployment-guide" class="hash-link" aria-label="Direct link to Deployment Guide" title="Direct link to Deployment Guide"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="docker-compose">Docker Compose<a href="#docker-compose" class="hash-link" aria-label="Direct link to Docker Compose" title="Direct link to Docker Compose"></a></h3><p>Update your <code>docker-compose.yml</code>:</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">services</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 key atrule">datahub-gms</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 key atrule">environment</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"> ELASTICSEARCH_SHIM_ENABLED=true</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"> ELASTICSEARCH_SHIM_ENGINE_TYPE=AUTO_DETECT</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># ... other ES config</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="kubernetes">Kubernetes<a href="#kubernetes" class="hash-link" aria-label="Direct link to Kubernetes" title="Direct link to Kubernetes"></a></h3><p>Update your deployment manifests:</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">apiVersion</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> apps/v1</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token key atrule">kind</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> Deployment</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token key atrule">metadata</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 key atrule">name</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> datahub</span><span class="token punctuation" style="color:rgb(199, 146, 234)">-</span><span class="token plain">gms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token key atrule">spec</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 key atrule">template</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 key atrule">spec</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 key atrule">containers</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><span class="token key atrule">name</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> datahub</span><span class="token punctuation" style="color:rgb(199, 146, 234)">-</span><span class="token plain">gms</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">env</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><span class="token key atrule">name</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> ELASTICSEARCH_SHIM_ENABLED</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">value</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"true"</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><span class="token key atrule">name</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> ELASTICSEARCH_SHIM_ENGINE_TYPE</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">value</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"AUTO_DETECT"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># ... other configuration</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="helm">Helm<a href="#helm" class="hash-link" aria-label="Direct link to Helm" title="Direct link to Helm"></a></h3><p>Update your <code>values.yaml</code>:</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">global</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 key atrule">elasticsearch</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 key atrule">shim</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 key atrule">enabled</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">engineType</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"AUTO_DETECT"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">autoDetectEngine</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</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="validation-and-testing">Validation and Testing<a href="#validation-and-testing" class="hash-link" aria-label="Direct link to Validation and Testing" title="Direct link to Validation and Testing"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="verify-shim-configuration">Verify Shim Configuration<a href="#verify-shim-configuration" class="hash-link" aria-label="Direct link to Verify Shim Configuration" title="Direct link to Verify Shim Configuration"></a></h3><ol><li><strong>Check logs</strong> for shim initialization:</li></ol><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash 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)">docker</span><span class="token plain"> logs datahub-gms </span><span class="token operator" style="color:rgb(137, 221, 255)">|</span><span class="token plain"> </span><span class="token function" style="color:rgb(130, 170, 255)">grep</span><span class="token plain"> -i </span><span class="token string" style="color:rgb(195, 232, 141)">"shim\|search"</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>Look for messages like:</p><div class="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">INFO Creating SearchClientShim for engine type: ELASTICSEARCH_7</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">INFO Auto-detected search engine type: ELASTICSEARCH_7</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><ol><li><strong>Test search functionality</strong> in DataHub UI:</li></ol><ul><li>Search for datasets</li><li>Browse data assets</li><li>Check that lineage is working</li></ul><ol start="2"><li><strong>Monitor performance</strong> during transition:</li></ol><ul><li>Watch for connection errors</li><li>Check response times</li><li>Monitor resource usage</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="common-validation-steps">Common Validation Steps<a href="#common-validation-steps" class="hash-link" aria-label="Direct link to Common Validation Steps" title="Direct link to Common Validation Steps"></a></h3><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># 1. Check DataHub health endpoint</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token function" style="color:rgb(130, 170, 255)">curl</span><span class="token plain"> http://localhost:8080/health</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># 2. Verify search index access</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token function" style="color:rgb(130, 170, 255)">curl</span><span class="token plain"> -u user:pass </span><span class="token string" style="color:rgb(195, 232, 141)">"http://elasticsearch:9200/_cat/indices?v"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># 3. Test search functionality</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token function" style="color:rgb(130, 170, 255)">curl</span><span class="token plain"> -X POST </span><span class="token string" style="color:rgb(195, 232, 141)">"http://localhost:8080/api/graphql"</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"> -d </span><span class="token string" style="color:rgb(195, 232, 141)">'{"query": "{ search(input: {type: DATASET, query: \"*\"}) { total }}"}'</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="troubleshooting">Troubleshooting<a href="#troubleshooting" class="hash-link" aria-label="Direct link to Troubleshooting" title="Direct link to Troubleshooting"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="common-issues">Common Issues<a href="#common-issues" class="hash-link" aria-label="Direct link to Common Issues" title="Direct link to Common Issues"></a></h3><h4 class="anchor anchorWithStickyNavbar_LWe7" id="1-connection-failures">1. Connection Failures<a href="#1-connection-failures" class="hash-link" aria-label="Direct link to 1. Connection Failures" title="Direct link to 1. Connection Failures"></a></h4><div class="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">ERROR: Unable to connect to search cluster</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><strong>Solutions:</strong></p><ul><li>Verify <code>ELASTICSEARCH_HOST</code> and <code>ELASTICSEARCH_PORT</code></li><li>Check network connectivity between DataHub and search cluster</li><li>Ensure credentials are correct</li><li>Verify SSL/TLS configuration (ES8 Containers use SSL by default so if you previously weren't this may cause issues)</li></ul><h4 class="anchor anchorWithStickyNavbar_LWe7" id="2-auto-detection-failures">2. Auto-Detection Failures<a href="#2-auto-detection-failures" class="hash-link" aria-label="Direct link to 2. Auto-Detection Failures" title="Direct link to 2. Auto-Detection Failures"></a></h4><div class="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">ERROR: Unable to detect search engine type</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><strong>Solutions:</strong></p><ul><li>Manually specify engine type: <code>ELASTICSEARCH_SHIM_ENGINE_TYPE=ELASTICSEARCH_8</code></li><li>Check cluster health: <code>curl http://elasticsearch:9200/_cluster/health</code></li><li>Verify authentication credentials</li></ul><h4 class="anchor anchorWithStickyNavbar_LWe7" id="3-api-compatibility-issues">3. API Compatibility Issues<a href="#3-api-compatibility-issues" class="hash-link" aria-label="Direct link to 3. API Compatibility Issues" title="Direct link to 3. API Compatibility Issues"></a></h4><div class="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">ERROR: Incompatible API version</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><strong>Solutions:</strong></p><ul><li>Check Elasticsearch version compatibility</li><li>Review deprecation warnings in ES logs</li></ul><h4 class="anchor anchorWithStickyNavbar_LWe7" id="4-dependency-issues">4. Dependency Issues<a href="#4-dependency-issues" class="hash-link" aria-label="Direct link to 4. Dependency Issues" title="Direct link to 4. Dependency Issues"></a></h4><div class="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">ERROR: ClassNotFoundException for ES client</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><strong>Solutions:</strong></p><ul><li>Ensure correct client dependencies are included in classpath</li><li>Check <code>build.gradle</code> for required dependencies</li><li>Rebuild DataHub with appropriate client libraries</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="debug-mode">Debug Mode<a href="#debug-mode" class="hash-link" aria-label="Direct link to Debug Mode" title="Direct link to Debug Mode"></a></h3><p>Enable debug logging to troubleshoot issues:</p><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Add to environment</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_LOG_LEVEL</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">DEBUG</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)">ELASTICSEARCH_SHIM_DEBUG</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true</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="performance-monitoring">Performance Monitoring<a href="#performance-monitoring" class="hash-link" aria-label="Direct link to Performance Monitoring" title="Direct link to Performance Monitoring"></a></h3><p>Monitor key metrics during migration:</p><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Connection pool metrics</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token function" style="color:rgb(130, 170, 255)">curl</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"http://localhost:8080/actuator/metrics/elasticsearch.connections"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Search operation metrics</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token function" style="color:rgb(130, 170, 255)">curl</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"http://localhost:8080/actuator/metrics/elasticsearch.search"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Error rates</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token function" style="color:rgb(130, 170, 255)">curl</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"http://localhost:8080/actuator/metrics/elasticsearch.errors"</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="best-practices">Best Practices<a href="#best-practices" class="hash-link" aria-label="Direct link to Best Practices" title="Direct link to Best Practices"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="pre-migration">Pre-Migration<a href="#pre-migration" class="hash-link" aria-label="Direct link to Pre-Migration" title="Direct link to Pre-Migration"></a></h3><ol><li><strong>Backup your data</strong> before changing search engine configuration</li><li><strong>Test in staging</strong> with representative data volumes</li><li><strong>Monitor resource usage</strong> patterns in current deployment</li><li><strong>Document current configuration</strong> for rollback scenarios</li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="during-migration">During Migration<a href="#during-migration" class="hash-link" aria-label="Direct link to During Migration" title="Direct link to During Migration"></a></h3><ol><li><strong>Enable auto-detection initially</strong> for smooth transition</li><li><strong>Monitor logs closely</strong> for connection and performance issues</li><li><strong>Test all search functionality</strong> after configuration changes</li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="post-migration">Post-Migration<a href="#post-migration" class="hash-link" aria-label="Direct link to Post-Migration" title="Direct link to Post-Migration"></a></h3><ol><li><strong>Update documentation</strong> with new configuration</li><li><strong>Monitor performance metrics</strong> for several days</li><li><strong>Plan for future upgrades</strong> (ES 8.x native support)</li><li><strong>Train team members</strong> on new configuration options</li></ol><h2 class="anchor anchorWithStickyNavbar_LWe7" id="future-enhancements">Future Enhancements<a href="#future-enhancements" class="hash-link" aria-label="Direct link to Future Enhancements" title="Direct link to Future Enhancements"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="planned-features">Planned Features<a href="#planned-features" class="hash-link" aria-label="Direct link to Planned Features" title="Direct link to Planned Features"></a></h3><ol><li><strong>OpenSearch 3.x support</strong> when available</li><li><strong>Enhanced AWS IAM authentication</strong> for all client types</li><li><strong>Advanced feature detection</strong> and capability querying</li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="contributing">Contributing<a href="#contributing" class="hash-link" aria-label="Direct link to Contributing" title="Direct link to Contributing"></a></h3><p>To extend the shim for additional search engines:</p><ol><li><strong>Implement <code>SearchClientShim</code></strong> interface</li><li><strong>Add engine type</strong> to <code>SearchEngineType</code> enum</li><li><strong>Update factory logic</strong> in <code>SearchClientShimFactory</code></li><li><strong>Add configuration options</strong> to application.yaml</li><li><strong>Write tests</strong> and documentation</li></ol><h2 class="anchor anchorWithStickyNavbar_LWe7" id="support-matrix">Support Matrix<a href="#support-matrix" class="hash-link" aria-label="Direct link to Support Matrix" title="Direct link to Support Matrix"></a></h2><table><thead><tr><th>DataHub Version</th><th>ES 7.17</th><th>ES 8.x</th><th>OpenSearch 2.x</th></tr></thead><tbody><tr><td>0.3.15+</td><td>✅ Full</td><td>✅ 8.17+</td><td>✅ Full</td></tr><tr><td>Future</td><td>✅ Full</td><td>✅ Full</td><td>✅ Full</td></tr></tbody></table><h2 class="anchor anchorWithStickyNavbar_LWe7" id="faq">FAQ<a href="#faq" class="hash-link" aria-label="Direct link to FAQ" title="Direct link to FAQ"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="q-can-i-use-the-shim-with-existing-deployments">Q: Can I use the shim with existing deployments?<a href="#q-can-i-use-the-shim-with-existing-deployments" class="hash-link" aria-label="Direct link to Q: Can I use the shim with existing deployments?" title="Direct link to Q: Can I use the shim with existing deployments?"></a></h3><p><strong>A:</strong> Yes, the shim is backward compatible. It is a thin abstraction layer over the existing code</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="q-can-i-use-multiple-search-engines-simultaneously">Q: Can I use multiple search engines simultaneously?<a href="#q-can-i-use-multiple-search-engines-simultaneously" class="hash-link" aria-label="Direct link to Q: Can I use multiple search engines simultaneously?" title="Direct link to Q: Can I use multiple search engines simultaneously?"></a></h3><p><strong>A:</strong> No, DataHub connects to one search cluster at a time. Use the shim to switch between different engine types.</p><p>For additional support, please refer to the <a href="https://datahubproject.io/docs/community" target="_blank" rel="noopener noreferrer">DataHub community forums</a> or file an issue in the <a href="https://github.com/datahubproject/datahub" target="_blank" rel="noopener noreferrer">GitHub repository</a>.</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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