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https://issues.apache.org/jira/browse/BEAM-2629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16254468#comment-16254468
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ASF GitHub Bot commented on BEAM-2629:
--------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/beam/pull/3581
> Adding timestamp and id attributes to pubsub messages with no other
> attributes causes an exception.
> ---------------------------------------------------------------------------------------------------
>
> Key: BEAM-2629
> URL: https://issues.apache.org/jira/browse/BEAM-2629
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-gcp
> Affects Versions: 2.2.0
> Reporter: Nigel Kilmer
> Assignee: Nigel Kilmer
>
> I'm trying to use PubsubIO.writeProtos along with a timestamp and id
> attribute. When PubsubIO tries to write the messages to my topic, it throws a
> PipelineExecutionException with this cause:
> Caused by: java.lang.UnsupportedOperationException
> at java.util.AbstractMap.put(AbstractMap.java:209)
> at
> org.apache.beam.sdk.io.gcp.pubsub.PubsubJsonClient.publish(PubsubJsonClient.java:148)
> at
> org.apache.beam.sdk.io.gcp.pubsub.PubsubUnboundedSink$WriterFn.publishBatch(PubsubUnboundedSink.java:249)
> at
> org.apache.beam.sdk.io.gcp.pubsub.PubsubUnboundedSink$WriterFn.processElement(PubsubUnboundedSink.java:285)
> Looks like the problem is that PubsubJsonClient attempts to add the timestamp
> and id attributes to a map which may be empty and immutable if no other
> attributes are specified on the message. I will submit a pull request with a
> fix for this bug shortly.
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