Felix N created HDFS-17905:
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Summary: Standby/Observer NameNode can leak stale pending DN
messages
Key: HDFS-17905
URL: https://issues.apache.org/jira/browse/HDFS-17905
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Felix N
Assignee: Felix N
Since DNs do not report deleted blocks to NNs, in standby and observer
namenodes, if not removed, pendingDNMessages will never drain messages from
blocks that have already been deleted, leading to a leak.
The solution is to clean up the messages inside removeBlock() as well.
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