[GitHub] [hudi] sbernauer edited a comment on issue #1806: [SUPPORT] Deltastreamer can`t validate rewritten record that is valid

[GitBox <gi...@apache.org>]

sbernauer edited a comment on issue #1806:
URL: https://github.com/apache/hudi/issues/1806#issuecomment-655375517


   I just wanted to point out, that i use a patched version of avro 1.8.2. If i dont patch avro 1.8.2 the following exception occurs: "org.apache.avro.AvroRuntimeException: Unknown datum type org.apache.avro.JsonProperties$Null" (see https://issues.apache.org/jira/browse/AVRO-1954)
   
   The events with `optionalField == null` can't be processed. If i run Deltastreamer with `--commit-on-errors` the events with `optionalField != null` are processed, events with `optionalField == null` are missing in the MOR table.
   
   As next step i created a similar schema without `"default": null`. New Testdata, topic and schema in schema registry. Everything worked, all events (with and without null-value) get processed :)
   
   Lastly i tried reading with the new schema from the first topic with Testdata (written with `"default": null`). Everything worked again.


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