[jira] [Resolved] (HBASE-3893) HRegion.internalObtainRowLock shouldn't wait forever

["Ted Yu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-3893?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ted Yu resolved HBASE-3893.
---------------------------

      Resolution: Fixed
    Hadoop Flags: [Reviewed]

> HRegion.internalObtainRowLock shouldn't wait forever
> ----------------------------------------------------
>
>                 Key: HBASE-3893
>                 URL: https://issues.apache.org/jira/browse/HBASE-3893
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.90.2
>            Reporter: Jean-Daniel Cryans
>            Assignee: Ted Yu
>            Priority: Blocker
>             Fix For: 0.90.4
>
>         Attachments: 3893-v2.txt, 3893.txt
>
>
> We just had a weird episode where one user was trying to insert a lot of data with overlapping keys into a single region (all of that is a separate problem), and the region server rapidly filled up all it's handlers + queues with those calls. Basically it wasn't deadlocked but almost.
> Worse, now that we have a 60 seconds socket timeout the clients were eventually getting the timeout and then retrying another call to that same region server.
> We should have a timeout on lockedRows.wait() in HRegion.internalObtainRowLock in order to survive this better.

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