James Thomas created HDFS-6853:
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Summary: MiniDFSCluster.isClusterUp() should not check if null
NameNodes are up
Key: HDFS-6853
URL: https://issues.apache.org/jira/browse/HDFS-6853
Project: Hadoop HDFS
Issue Type: Bug
Reporter: James Thomas
Suppose we have a two-NN cluster and then shut down one of the NN's (NN0). When
we try to restart the other NN (NN1), we wait for isClusterUp() to return true,
but this will never happen because NN0 is null and isNameNodeUp returns false
for a null NN.
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