Daryn Sharp created HDFS-12173:
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Summary: MiniDFSCluster cannot reliably use NameNode#stop
Key: HDFS-12173
URL: https://issues.apache.org/jira/browse/HDFS-12173
Project: Hadoop HDFS
Issue Type: Bug
Components: namenode
Affects Versions: 2.7.0
Reporter: Daryn Sharp
Sporadic test failures occur because {{NameNode#stop}} used by the mini cluster
does not properly manage the HA context's state. It directly calls
{{HAState#exitState(context)}} instead of {{HAState#setState(context,state)}}.
The latter will properly lock the namesystem and update the ha state while
locked, while the former does not. The result is that while the cluster is
stopping, the lock is released and any queued rpc calls think the NN is still
active and are processed while the NN is in an unstable half-stopped state.
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