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https://issues.apache.org/jira/browse/BEAM-7091?focusedWorklogId=228994&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-228994
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ASF GitHub Bot logged work on BEAM-7091:
----------------------------------------
Author: ASF GitHub Bot
Created on: 17/Apr/19 10:35
Start Date: 17/Apr/19 10:35
Worklog Time Spent: 10m
Work Description: mxm commented on issue #8327: [BEAM-7091] fix NPE in
DoFnOperator#dispose
URL: https://github.com/apache/beam/pull/8327#issuecomment-484030292
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Issue Time Tracking
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Worklog Id: (was: 228994)
Time Spent: 0.5h (was: 20m)
> FlinkRunner: NPE in DoFnOperator
> --------------------------------
>
> Key: BEAM-7091
> URL: https://issues.apache.org/jira/browse/BEAM-7091
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Affects Versions: 2.11.0
> Reporter: Jan Lukavský
> Priority: Minor
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Under some unknown conditions - probably caused by some other error - I see
> following trace in flink's taskmanager:
> {code:java}
> 2019-04-17 07:41:17,863 ERROR
> org.apache.flink.streaming.runtime.tasks.StreamTask - Error during
> disposal of stream operator.
> java.lang.NullPointerException
> at
> org.apache.beam.runners.flink.translation.wrappers.streaming.DoFnOperator.dispose(DoFnOperator.java:435)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:477)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:378)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:704)
> at java.lang.Thread.run(Thread.java:748)
> {code}
> It looks like there are missing null checks in {{DoFnOperator}}, which will
> cause this if {{dispose}} is called before {{open}} (for whatever reason).
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