Konstantin Shvachko created HDFS-5077:
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Summary: NPE in FSNamesystem.commitBlockSynchronization()
Key: HDFS-5077
URL: https://issues.apache.org/jira/browse/HDFS-5077
Project: Hadoop HDFS
Issue Type: Bug
Components: namenode
Affects Versions: 2.0.5-alpha
Reporter: Konstantin Shvachko
NN starts a block recovery, which will synchronize block replicas on different
DNs. In the end one of DNs will report the list of the nodes containing the
consistent replicas to the NN via commitBlockSynchronization() call. The NPE
happens if just before processing commitBlockSynchronization() NN removes from
active one of DNs that are then reported in the call.
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