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https://issues.apache.org/jira/browse/AVRO-3099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17428378#comment-17428378
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Dan Hill commented on AVRO-3099:
--------------------------------
I ended up extending the proto classes and handled this case myself.
> ProtobufDataWriter fails when enum value is UNRECOGNIZED
> --------------------------------------------------------
>
> Key: AVRO-3099
> URL: https://issues.apache.org/jira/browse/AVRO-3099
> Project: Apache Avro
> Issue Type: Bug
> Components: java
> Affects Versions: 1.10.1
> Reporter: Dan Hill
> Priority: Major
>
> This happens when the Java job with the protobuf writer has an older version
> of the protobuf class but receives protobuf data containing new, unrecognized
> enum values. When I print out the enum's toString, it returns 'UNRECOGNIZED'.
> 2021-03-29 22:01:33
> org.apache.avro.file.DataFileWriter$AppendWriteException:
> java.lang.NullPointerException: null of com.example.proto.event.ActionType in
> field action_type of com.example.proto.event.Action of union in field action
> of com.example.proto.event.FlatEvent
> at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:317)
> ...
> Caused by: java.lang.NullPointerException: null of
> com.example.proto.event.ActionType in field action_type of
> com.example.proto.event.Action of union in field action of
> com.example.proto.event.Record
> at
> org.apache.avro.generic.GenericDatumWriter.npe(GenericDatumWriter.java:184)
> at
> org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:178)
> at
> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:83)
> at
> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:73)
> at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:314)
> ... 35 more
> Caused by: java.lang.NullPointerException
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