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https://issues.apache.org/jira/browse/SPARK-26927?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Marcelo Vanzin resolved SPARK-26927.
------------------------------------
Resolution: Fixed
Fix Version/s: 2.3.4
2.4.2
3.0.0
Issue resolved by pull request 23842
[https://github.com/apache/spark/pull/23842]
> Race condition may cause dynamic allocation not working
> -------------------------------------------------------
>
> Key: SPARK-26927
> URL: https://issues.apache.org/jira/browse/SPARK-26927
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.1.0, 2.4.0
> Reporter: liupengcheng
> Assignee: liupengcheng
> Priority: Major
> Fix For: 3.0.0, 2.4.2, 2.3.4
>
> Attachments: Selection_042.jpg, Selection_043.jpg, Selection_044.jpg,
> Selection_045.jpg, Selection_046.jpg
>
>
> Recently, we catch a bug that caused our production spark thriftserver hangs:
> There is a race condition in the ExecutorAllocationManager that the
> `SparkListenerExecutorRemoved` event is posted before the
> `SparkListenerTaskStart` event, which will cause the incorrect result of
> `executorIds`, then when some executor idles, the real executors will be
> removed even executor number is equal to `minNumExecutors` due to the
> incorrect computation of `newExecutorTotal`(may greater than the
> `minNumExecutors`), thus may finally causing zero available executors but a
> wrong number of executorIds was kept in memory.
> What's more, even the `SparkListenerTaskEnd` event can not make the fake
> `executorIds` released, because later idle event for the fake executors can
> not cause the real removal of these executors, as they are already removed
> and they are not exist in the `executorDataMap` of
> `CoaseGrainedSchedulerBackend`.
> Logs:
> !Selection_042.jpg!
> !Selection_043.jpg!
> !Selection_044.jpg!
> !Selection_045.jpg!
> !Selection_046.jpg!
> EventLogs(DisOrder of events):
> {code:java}
> {"Event":"SparkListenerExecutorRemoved","Timestamp":1549936077543,"Executor
> ID":"131","Removed Reason":"Container
> container_e28_1547530852233_236191_02_000180 exited from explicit termination
> request."}
> {"Event":"SparkListenerTaskStart","Stage ID":136689,"Stage Attempt
> ID":0,"Task Info":{"Task ID":448048,"Index":2,"Attempt":0,"Launch
> Time":1549936032872,"Executor
> ID":"131","Host":"mb2-hadoop-prc-st474.awsind","Locality":"RACK_LOCAL",
> "Speculative":false,"Getting Result Time":0,"Finish
> Time":1549936032906,"Failed":false,"Killed":false,"Accumulables":[{"ID":12923945,"Name":"internal.metrics.executorDeserializeTime","Update":10,"Value":13,"Internal":true,"Count
> Faile d
> Values":true},{"ID":12923946,"Name":"internal.metrics.executorDeserializeCpuTime","Update":2244016,"Value":4286494,"Internal":true,"Count
> Failed
> Values":true},{"ID":12923947,"Name":"internal.metrics.executorRunTime","Update":20,"Val
> ue":39,"Internal":true,"Count Failed
> Values":true},{"ID":12923948,"Name":"internal.metrics.executorCpuTime","Update":13412614,"Value":26759061,"Internal":true,"Count
> Failed Values":true},{"ID":12923949,"Name":"internal.metrics.resultS
> ize","Update":3578,"Value":7156,"Internal":true,"Count Failed
> Values":true},{"ID":12923954,"Name":"internal.metrics.peakExecutionMemory","Update":33816576,"Value":67633152,"Internal":true,"Count
> Failed Values":true},{"ID":12923962,"Na
> me":"internal.metrics.shuffle.write.bytesWritten","Update":1367,"Value":2774,"Internal":true,"Count
> Failed
> Values":true},{"ID":12923963,"Name":"internal.metrics.shuffle.write.recordsWritten","Update":23,"Value":45,"Internal":true,"Cou
> nt Failed
> Values":true},{"ID":12923964,"Name":"internal.metrics.shuffle.write.writeTime","Update":3259051,"Value":6858121,"Internal":true,"Count
> Failed Values":true},{"ID":12921550,"Name":"number of output
> rows","Update":"158","Value" :"289","Internal":true,"Count Failed
> Values":true,"Metadata":"sql"},{"ID":12921546,"Name":"number of output
> rows","Update":"23","Value":"45","Internal":true,"Count Failed
> Values":true,"Metadata":"sql"},{"ID":12921547,"Name":"peak memo ry total
> (min, med,
> max)","Update":"33816575","Value":"67633149","Internal":true,"Count Failed
> Values":true,"Metadata":"sql"},{"ID":12921541,"Name":"data size total (min,
> med, max)","Update":"551","Value":"1077","Internal":true,"Count Failed
> Values":true,"Metadata":"sql"}]}}
> {code}
>
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