If locking of a storage dir fails, it will remove the other NN's lock file on
exit
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Key: HDFS-2877
URL: https://issues.apache.org/jira/browse/HDFS-2877
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Affects Versions: 1.0.0, 0.23.0, 0.24.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
In {{Storage.tryLock()}}, we call {{lockF.deleteOnExit()}} regardless of
whether we successfully lock the directory. So, if another NN has the directory
locked, then we'll fail to lock it the first time we start another NN. But our
failed start attempt will still remove the other NN's lockfile, and a second
attempt will erroneously start.
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