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https://issues.apache.org/jira/browse/BEAM-2605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismaël Mejía resolved BEAM-2605.
--------------------------------
Resolution: Duplicate
Fix Version/s: 2.2.0
> Exception raised when using MongoDBIO.Write in streaming mode
> -------------------------------------------------------------
>
> Key: BEAM-2605
> URL: https://issues.apache.org/jira/browse/BEAM-2605
> Project: Beam
> Issue Type: Bug
> Components: io-java-mongodb
> Affects Versions: 2.0.0
> Reporter: Pascal Castéran
> Priority: Major
> Fix For: 2.2.0
>
>
> In org.apache.beam.sdk.io.mongodb.MongoDbIO.Write.WriteFn#flush(), no check
> is done on the size of the batch list of documents before executing the
> _*insertMany*_ operation.
> In streaming mode, when processing an empty pane, an empty list of documents
> can be passed to the MongoDB client which results in the following exception:
> {quote}java.lang.IllegalArgumentException: state should be: writes is not an
> empty list
> at com.mongodb.assertions.Assertions.isTrueArgument(Assertions.java:99)
> at
> com.mongodb.operation.MixedBulkWriteOperation.<init>(MixedBulkWriteOperation.java:95)
> at
> com.mongodb.MongoCollectionImpl.insertMany(MongoCollectionImpl.java:323)
> at
> com.mongodb.MongoCollectionImpl.insertMany(MongoCollectionImpl.java:311)
> at
> org.apache.beam.sdk.io.mongodb.MongoDbIO$Write$WriteFn.flush(MongoDbIO.java:513)
> at
> org.apache.beam.sdk.io.mongodb.MongoDbIO$Write$WriteFn.finishBundle(MongoDbIO.java:506){quote}
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