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https://issues.apache.org/jira/browse/BEAM-2993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16185569#comment-16185569
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Jean-Baptiste Onofré commented on BEAM-2993:
--------------------------------------------

Indeed. That's weird.

> 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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