From b6589ab1d1e7cca32f9f0e4d07d22db525691cab Mon Sep 17 00:00:00 2001 From: Mars Lan Date: Wed, 3 Jun 2020 13:52:56 -0700 Subject: [PATCH] Update README.md --- metadata-ingestion/README.md | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/metadata-ingestion/README.md b/metadata-ingestion/README.md index 19bf724764..5ad24036f6 100644 --- a/metadata-ingestion/README.md +++ b/metadata-ingestion/README.md @@ -48,6 +48,11 @@ Flushing records... ``` This will bootstrap DataHub with sample datasets and sample users. +> ***Note*** +> There is a [known issue](https://github.com/fastavro/fastavro/issues/292) with the Python Avro serialization library +> that can lead to unexpected result when it comes to union of types. +> Always [use the tuple notation](https://fastavro.readthedocs.io/en/latest/writer.html#using-the-tuple-notation-to-specify-which-branch-of-a-union-to-take) to avoid encountering these difficult-to-debug issues. + ## Ingest metadata from LDAP to DataHub The ldap_etl provides you ETL channel to communicate with your LDAP server. ```