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Posted to issues@hbase.apache.org by "Jean-Daniel Cryans (Created) (JIRA)" <ji...@apache.org> on 2011/10/12 00:05:11 UTC
[jira] [Created] (HBASE-4574) "Node deleted but still in RIT"
printed too often
"Node deleted but still in RIT" printed too often
-------------------------------------------------
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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[jira] [Resolved] (HBASE-4574) "Node deleted but still in RIT"
printed too often
Posted by "Jean-Daniel Cryans (Resolved) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4574?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jean-Daniel Cryans resolved HBASE-4574.
---------------------------------------
Resolution: Duplicate
Fix Version/s: (was: 0.92.0)
Dup of HBASE-4308
> "Node deleted but still in RIT" printed too often
> -------------------------------------------------
>
> 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
>
> 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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