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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-2766) cluster may not recover if RS hosting ROOT and META together crashes
Date Thu, 05 May 2011 21:05:03 GMT

     [ https://issues.apache.org/jira/browse/HBASE-2766?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack resolved HBASE-2766.
--------------------------

    Resolution: Cannot Reproduce

Resolving as stale and can't reproduce (I've been bunch of rolling restart testing lately
and cluster comes back if one server has meta and root for me).

> cluster may not recover if RS hosting ROOT and META together crashes
> --------------------------------------------------------------------
>
>                 Key: HBASE-2766
>                 URL: https://issues.apache.org/jira/browse/HBASE-2766
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Eugene Koontz
>            Assignee: Eugene Koontz
>
> If both -ROOT- and .META. are located on the same regionserver, and that regionserver
crashes, the master is unable to reassign these tables to a new regionserver. 
> Andrew writes:
> "I ran a webtable scenario up on EC2 using the latest TM-2 and a cluster with 1 ZK, 1
master, 5 slaves, and 1 auxiliary node, using the HBase cluster scripts at  https://tm-files.s3.amazonaws.com/hbase-ec2.tar.bz2.
On the aux node I uploaded the Faulkner utility --  https://tm-files.s3.amazonaws.com/faulkner.tar.gz
 -- and ran the 'webtable.sh' script in that tarball. On the master I waited about 30 minutes
for a fair amount of regions to proliferate and then ran:
>     # nice -10 hbase shell
>     hbase> count 'TestTable'
> and walked away, leaving it to chew on the heavy write load and scan.
> At some point during this test scenario a region server crashed, due to a JVM segfault.
The client (Faulkner) never recovered.
> As far as I can see, in this test scenario the master never reassigns regions away from
a crashed RS."

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