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https://issues.apache.org/jira/browse/BEAM-2993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16185562#comment-16185562
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Etienne Chauchot commented on BEAM-2993:
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stacktrace says `unable to serialize
org.apache.beam.sdk.io.WriteFiles$ApplyShardingKey@7a3793c7` but the code has
`write().withoutSharding();` so there should be no sharding key, right?.
> AvroIO.write without specifying a schema
> ----------------------------------------
>
> Key: BEAM-2993
> URL: https://issues.apache.org/jira/browse/BEAM-2993
> Project: Beam
> Issue Type: Improvement
> Components: sdk-java-extensions
> Reporter: Etienne Chauchot
> Assignee: Etienne Chauchot
>
> Similarly to https://issues.apache.org/jira/browse/BEAM-2677, we should be
> able to write to avro files using {{AvroIO}} without specifying a schema at
> build time. Consider the following use case: a user has a
> {{PCollection<GenericRecord>}} but the schema is only known while running
> the pipeline. {{AvroIO.writeGenericRecords}} needs the schema, but the
> schema is already available in {{GenericRecord}}. We should be able to call
> {{AvroIO.writeGenericRecords()}} with no schema.
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