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https://issues.apache.org/jira/browse/HDFS-16888?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Takanobu Asanuma resolved HDFS-16888.
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Fix Version/s: 3.4.0
Resolution: Fixed
> BlockManager#maxReplicationStreams, replicationStreamsHardLimit,
> blocksReplWorkMultiplier and PendingReconstructionBlocks#timeout should be
> volatile
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-16888
> URL: https://issues.apache.org/jira/browse/HDFS-16888
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Haiyang Hu
> Assignee: Haiyang Hu
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
>
> BlockManager#maxReplicationStreams, replicationStreamsHardLimit,
> blocksReplWorkMultiplier and PendingReconstructionBlocks#timeout these
> variables may be writen by NameNode#reconfReplicationParameters then while
> read by the other threads.
> Thus they should be declared as volatile to make sure the "happens-before"
> consistency.
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