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https://issues.apache.org/jira/browse/HDFS-16973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17708607#comment-17708607
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ASF GitHub Bot commented on HDFS-16973:
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virajjasani opened a new pull request, #5533:
URL: https://github.com/apache/hadoop/pull/5533
Mount table resolver location cache gets invalidated by taking write lock as
part of addEntry/removeEntry/refreshEntries calls. Since the write lock
exclusively updates the cache, getDestinationForPath already takes read lock
before accessing the cache. Similarly, retrieval of the cache size should also
take the read lock.
> RBF: MountTableResolver cache size lookup should take read lock
> ---------------------------------------------------------------
>
> Key: HDFS-16973
> URL: https://issues.apache.org/jira/browse/HDFS-16973
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
>
> Mount table resolver location cache gets invalidated by taking write lock as
> part of addEntry/removeEntry/refreshEntries calls. Since the write lock
> exclusively updates the cache, getDestinationForPath already takes read lock
> before accessing the cache. Similarly, retrieval of the cache size should
> also take the read lock.
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