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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4246) Cluster with too many regions cannot withstand some master failover scenarios
Date Wed, 20 Jun 2012 04:58:43 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13397269#comment-13397269
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ramkrishna.s.vasudevan commented on HBASE-4246:
-----------------------------------------------

@Gao
You got this in 0.90? or someother version?
                
> Cluster with too many regions cannot withstand some master failover scenarios
> -----------------------------------------------------------------------------
>
>                 Key: HBASE-4246
>                 URL: https://issues.apache.org/jira/browse/HBASE-4246
>             Project: HBase
>          Issue Type: Bug
>          Components: master, zookeeper
>    Affects Versions: 0.90.4
>            Reporter: Todd Lipcon
>            Priority: Critical
>             Fix For: 0.96.0
>
>
> We ran into the following sequence of events:
> - master startup failed after only ROOT had been assigned (for another reason)
> - restarted the master without restarting other servers. Since there was at least one
region assigned, it went through the failover code path
> - master scanned META and inserted every region into /hbase/unassigned in ZK.
> - then, it called "listChildren" on the /hbase/unassigned znode, and crashed with "Packet
len6080218 is out of range!" since the IPC response was larger than the default maximum.

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