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https://issues.apache.org/jira/browse/BEAM-724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Sumit Chawla reassigned BEAM-724:
---------------------------------
Assignee: Sumit Chawla
> NullPointerException in Snapshot State
> --------------------------------------
>
> Key: BEAM-724
> URL: https://issues.apache.org/jira/browse/BEAM-724
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Reporter: Sumit Chawla
> Assignee: Sumit Chawla
>
> This seems like a timing Issue. Its reproducible in case where Kafka topic
> does not exist yet. The UDF operator run is not called yet, but other thread
> calls snapshot before that:
> {code}
> java.lang.RuntimeException: Error while triggering checkpoint for Source:
> Read(UnboundedKafkaSource) -> ParDo(KafkaRecordToCTuple) ->
> ParDo(NetFlowToFlowContentTransformation) ->
> ParDo(FlowContentToRelationsTransformation) ->
> ParDo(GraphToJsonTransformation) -> AnonymousParDo -> ParDo(KafkaWriter) (1/1)
> at org.apache.flink.runtime.taskmanager.Task$2.run(Task.java:949)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.Exception: Failed to draw state snapshot from function:
> null
> at
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.snapshotOperatorState(AbstractUdfStreamOperator.java:132)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.performCheckpoint(StreamTask.java:598)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.triggerCheckpoint(StreamTask.java:565)
> at org.apache.flink.runtime.taskmanager.Task$2.run(Task.java:941)
> ... 5 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.beam.runners.flink.translation.wrappers.streaming.io.UnboundedSourceWrapper.snapshotState(UnboundedSourceWrapper.java:340)
> at
> org.apache.beam.runners.flink.translation.wrappers.streaming.io.UnboundedSourceWrapper.snapshotState(UnboundedSourceWrapper.java:54)
> at
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.snapshotOperatorState(AbstractUdfStreamOperator.java:129)
> ... 8 more
> {code}
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