Haiyang Hu created HDFS-16888:
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Summary: 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
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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