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Posted to issues@spark.apache.org by "Shixiong Zhu (JIRA)" <ji...@apache.org> on 2019/04/02 18:38:03 UTC
[jira] [Updated] (SPARK-27348) HeartbeatReceiver doesn't remove
lost executors from CoarseGrainedSchedulerBackend
[ https://issues.apache.org/jira/browse/SPARK-27348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Shixiong Zhu updated SPARK-27348:
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Description: When a heartbeat timeout happens in HeartbeatReceiver, it doesn't remove lost executors from CoarseGrainedSchedulerBackend. When a connection of an executor is not gracefully shut down, CoarseGrainedSchedulerBackend may not receive a disconnect event. In this case, CoarseGrainedSchedulerBackend still thinks a lost executor is still alive. CoarseGrainedSchedulerBackend may ask TaskScheduler to run tasks on this lost executor. This task will never finish and the job will hang forever. (was: When a heartbeat timeout happens in HeartbeatReceiver, it doesn't remove lost executors from CoarseGrainedSchedulerBackend. When a connection is not gracefully shut down, CoarseGrainedSchedulerBackend may not receive a disconnect event. In this case, CoarseGrainedSchedulerBackend still thinks a lost executor is still alive. CoarseGrainedSchedulerBackend may ask TaskScheduler to run tasks on this lost executor. This task will never finish and the job will hang forever.)
> HeartbeatReceiver doesn't remove lost executors from CoarseGrainedSchedulerBackend
> ----------------------------------------------------------------------------------
>
> Key: SPARK-27348
> URL: https://issues.apache.org/jira/browse/SPARK-27348
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.4.0
> Reporter: Shixiong Zhu
> Priority: Major
>
> When a heartbeat timeout happens in HeartbeatReceiver, it doesn't remove lost executors from CoarseGrainedSchedulerBackend. When a connection of an executor is not gracefully shut down, CoarseGrainedSchedulerBackend may not receive a disconnect event. In this case, CoarseGrainedSchedulerBackend still thinks a lost executor is still alive. CoarseGrainedSchedulerBackend may ask TaskScheduler to run tasks on this lost executor. This task will never finish and the job will hang forever.
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