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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HBASE-2915) Deadlock between HRegion.ICV and HRegion.close
Date Mon, 23 Aug 2010 22:51:20 GMT

     [ https://issues.apache.org/jira/browse/HBASE-2915?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jean-Daniel Cryans resolved HBASE-2915.
---------------------------------------

    Hadoop Flags: [Reviewed]
      Resolution: Fixed

Committed to trunk, thanks for the review Stack!

> Deadlock between HRegion.ICV and HRegion.close
> ----------------------------------------------
>
>                 Key: HBASE-2915
>                 URL: https://issues.apache.org/jira/browse/HBASE-2915
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>            Priority: Blocker
>             Fix For: 0.90.0
>
>         Attachments: HBASE-2915-v4.patch
>
>
> HRegion.ICV gets a row lock then gets a newScanner lock.
> HRegion.close gets a newScanner lock, slitCloseLock and finally waits for all row locks
to finish.
> If the ICV got the row lock and then close got the newScannerLock, both end up waiting
on the other. This was introduced when Get became a Scan.
> Stack thinks we can get rid of the newScannerLock in close since we setClosing to true.

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