"Node deleted but still in RIT" printed too often
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Key: HBASE-4574
URL: https://issues.apache.org/jira/browse/HBASE-4574
Project: HBase
Issue Type: Bug
Affects Versions: 0.92.0
Reporter: Jean-Daniel Cryans
Fix For: 0.92.0
Looking at the 0.92 master logs, I see I often get this message:
bq. WARN org.apache.hadoop.hbase.master.AssignmentManager: Node deleted but
still in RIT: TestTable,blah. state=OPEN, ts=1318369648361, server=blah
The issue seems to be due to a race between OpenedRegionHandler and watchers in
AssignmentManager. Specifically, ORH first deletes the znode then deletes the
in-memory RIT data structure (via regionOnline). Between the two steps a
watcher is triggered and if it arrives first then it will see the region still
in RIT.
If the message is really supposed to be a warning then in the current form it's
useless as people will see this message 99% of the time because of this race.
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