Shixiong Zhu created SPARK-27348:
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Summary: 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
When a heartbeat timeout happens in HeartbeatReceiver, it doesn't remove lost
executors from CoarseGrainedSchedulerBackend. When a connection is gracefully
shut down, CoarseGrainedSchedulerBackend will 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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