HA: NN throws NPE during shutdown if it fails to startup
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Key: HDFS-2948
URL: https://issues.apache.org/jira/browse/HDFS-2948
Project: Hadoop HDFS
Issue Type: Sub-task
Components: ha, name-node
Affects Versions: HA branch (HDFS-1623)
Reporter: Todd Lipcon
Priority: Minor
Last night's nightly build had a bunch of NPEs thrown in NameNode.stop. Not
sure which patch introduced the issue, but the problem is that NameNode.stop()
is called if an exception is thrown during startup. If the exception is thrown
before the namesystem is created, then NameNode.namesystem is null, and
{{namesystem.stop}} throws NPE.
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