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https://issues.apache.org/jira/browse/KAFKA-9258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16986386#comment-16986386
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ASF GitHub Bot commented on KAFKA-9258:
---------------------------------------
cyrusv commented on pull request #7768: KAFKA-9258 Check Connect Metrics
non-null in task stop
URL: https://github.com/apache/kafka/pull/7768
Connect sometimes will stop task when start() has failed. In these cases, we
must guard against NPE as noted in
https://issues.apache.org/jira/browse/KAFKA-9258
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> Connect ConnectorStatusMetricsGroup sometimes NPE
> -------------------------------------------------
>
> Key: KAFKA-9258
> URL: https://issues.apache.org/jira/browse/KAFKA-9258
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Reporter: Cyrus Vafadari
> Priority: Major
>
> java.lang.NullPointerException
> at
> org.apache.kafka.connect.runtime.Worker$ConnectorStatusMetricsGroup.recordTaskRemoved(Worker.java:901)
> at
> org.apache.kafka.connect.runtime.Worker.awaitStopTask(Worker.java:720)
> at
> org.apache.kafka.connect.runtime.Worker.awaitStopTasks(Worker.java:740)
> at
> org.apache.kafka.connect.runtime.Worker.stopAndAwaitTasks(Worker.java:758)
> at
> org.apache.kafka.connect.runtime.distributed.DistributedHerder.processTaskConfigUpdatesWithIncrementalCooperative(DistributedHerder.java:575)
> at
> org.apache.kafka.connect.runtime.distributed.DistributedHerder.tick(DistributedHerder.java:396)
> at
> org.apache.kafka.connect.runtime.distributed.DistributedHerder.run(DistributedHerder.java:282)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
> at java.util.concurrent.FutureTask.run(FutureTask.java)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
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