Jing Zhao created HDFS-4106:
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Summary: BPServiceActor#lastHeartbeat, lastBlockReport and
lastDeletedReport should be declared as volatile
Key: HDFS-4106
URL: https://issues.apache.org/jira/browse/HDFS-4106
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 3.0.0
Reporter: Jing Zhao
Assignee: Jing Zhao
Priority: Minor
Attachments: HDFS-4106-trunk.001.patch
All these variables may be assigned/read by a testing thread (through
BPServiceActor#triggerXXX) while also assigned/read by the actor thread. Thus
they should be declared as volatile to make sure the "happens-before"
consistency.
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