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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:
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@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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