Xianyang Liu created SPARK-29236:
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Summary: Access 'executorDataMap' out of 'DriverEndpoint' should
be protected by lock
Key: SPARK-29236
URL: https://issues.apache.org/jira/browse/SPARK-29236
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 2.4.4
Reporter: Xianyang Liu
Just as the comments:
>
// Accessing `executorDataMap` in `DriverEndpoint.receive/receiveAndReply`
doesn't need any
// protection. But accessing `executorDataMap` out of
`DriverEndpoint.receive/receiveAndReply`
// must be protected by `CoarseGrainedSchedulerBackend.this`. Besides,
`executorDataMap` should
// only be modified in `DriverEndpoint.receive/receiveAndReply` with protection
by
// `CoarseGrainedSchedulerBackend.this`.
`executorDataMap` is not threadsafe, it should be protected by lock when
accessing it out of `DriverEndpoint`
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