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https://issues.apache.org/jira/browse/SPARK-21188?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shixiong Zhu resolved SPARK-21188.
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Resolution: Fixed
Assignee: Feng Liu
Fix Version/s: 2.3.0
> releaseAllLocksForTask should synchronize the whole method
> ----------------------------------------------------------
>
> Key: SPARK-21188
> URL: https://issues.apache.org/jira/browse/SPARK-21188
> Project: Spark
> Issue Type: Bug
> Components: Block Manager, Spark Core
> Affects Versions: 2.1.0, 2.2.0
> Reporter: Feng Liu
> Assignee: Feng Liu
> Fix For: 2.3.0
>
>
> Since the objects readLocksByTask, writeLocksByTask and infos are coupled and
> supposed to be modified by other threads concurrently, all the read and
> writes of them in the releaseAllLocksForTask method should be protected by a
> single synchronized block. The fine-grained synchronization in the current
> code can cause some test flakiness.
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