Daryn Sharp created HDFS-5773:
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Summary: NN may reject formerly dead DNs
Key: HDFS-5773
URL: https://issues.apache.org/jira/browse/HDFS-5773
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 0.23.10, 2.0.0-alpha, 3.0.0
Reporter: Daryn Sharp
Priority: Critical
If the heartbeat monitor declares a node dead, it may never allow a DN to
rejoin. The NN will generate messages like "Got blockReceivedDeleted message
from unregistered or dead node".
There appears to be a bug where the the isAlive flag is not set to true when a
formerly known DN attempts to rejoin.
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