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https://issues.apache.org/jira/browse/HBASE-6660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack resolved HBASE-6660.
--------------------------
Resolution: Cannot Reproduce
Old hbase. Reopen if can repro in new hbase.
> Meta assignment to a region server caused continuous NPE loop during
> postOpenDeployTasks
> ----------------------------------------------------------------------------------------
>
> Key: HBASE-6660
> URL: https://issues.apache.org/jira/browse/HBASE-6660
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.2
> Environment: CentOS release 5.7
> Reporter: Shrijeet Paliwal
>
> Recently I upgraded three data centers to our own checkout of 0.92.2, last
> commit :
> {noformat}
> commit 5accb6a1be4776630126ac21d07adb652b74df95
> Author: Zhihong Yu <[email protected]>
> Date: Mon Aug 20 18:19:45 2012 +0000
> HBASE-6608 Fix for HBASE-6160, META entries from daughters can be deleted
> before parent entries, shouldn't compare HRegionInfo's (Enis)
> {noformat}
> Two upgrades went fine, upgrade to one data center failed. Failed in the
> sense that ROOT and META assignment took forever. Panic struck I restarted
> master and all region servers. I may have deleted zookeeper node
> /hbase/root-region-server as well, dont ask me why :-(
> After this I managed to get ROOT assigned. But META assignment got stuck
> again.
> The log is here :
> https://raw.github.com/gist/3455435/adebd118b47aa3d715201010aa09e5eb8930033c/npe_rs_0.92.2.log
> Notice how region server was stuck in a loop of NPE (grep
> processBatchCallback). There is one more NPE related to zookeeper
> constructor.
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