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https://issues.apache.org/jira/browse/HDFS-16888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17675832#comment-17675832
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ASF GitHub Bot commented on HDFS-16888:
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haiyang1987 opened a new pull request, #5296:
URL: https://github.com/apache/hadoop/pull/5296
### Description of PR
[HDFS-16888](https://issues.apache.org/jira/browse/HDFS-16888)
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.
> 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
>
> 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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