Small race in BlockManager#close
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Key: HDFS-3048
URL: https://issues.apache.org/jira/browse/HDFS-3048
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Affects Versions: 0.23.2
Reporter: Eli Collins
Assignee: Eli Collins
There's a small race in BlockManager#close, we close the BlocksMap before the
replication monitor, which means the replication monitor can NPE if it tries to
access the blocks map. We need to swap the order (close the blocks map after
shutting down the repl monitor).
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