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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-3147) Regions stuck in transition after rolling restart, perpetual timeout handling but nothing happens
Date Tue, 26 Oct 2010 16:50:20 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3147?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-3147:
-------------------------

    Attachment: HBASE-3147-v11.patch

This is the patch I'm applying.  It fixes the two items raised at the top of this issue but
now I'm seeing other, lesser issues for which I'll open new JIRAs.

> Regions stuck in transition after rolling restart, perpetual timeout handling but nothing
happens
> -------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-3147
>                 URL: https://issues.apache.org/jira/browse/HBASE-3147
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>             Fix For: 0.90.0
>
>         Attachments: HBASE-3147-v11.patch, HBASE-3147-v6.patch
>
>
> The rolling restart script is great for bringing on the weird stuff.  On my little loaded
cluster if I run it, it horks the cluster and it doesn't recover.  I notice two issues that
need fixing:
> 1. We'll miss noticing that a server was carrying .META. and it never gets assigned --
the shutdown handlers get stuck in perpetual wait on a .META. assign that will never happen.
> 2. Perpetual cycling of the this sequence per region not succesfully assigned:
> {code}
>  2010-10-23 21:37:57,404 INFO org.apache.hadoop.hbase.master.AssignmentManager: Regions
in transition timed out:  usertable,user510588360,1287547556587.7f2d92497d2d03917afd574ea2aca55b.
state=PENDING_OPEN,                       ts=1287869814294  45154 2010-10-23 21:37:57,404
INFO org.apache.hadoop.hbase.master.AssignmentManager: Region has been PENDING_OPEN or OPENING
for too long, reassigning region=usertable,user510588360,1287547556587.                  
                  7f2d92497d2d03917afd574ea2aca55b.  45155 2010-10-23 21:37:57,404 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
master:60000-0x2bd57d1475046a Attempting to transition node 7f2d92497d2d03917afd574ea2aca55b
from RS_ZK_REGION_OPENING to M_ZK_REGION_OFFLINE  45156 2010-10-23 21:37:57,404 WARN org.apache.hadoop.hbase.zookeeper.ZKAssign:
master:60000-0x2bd57d1475046a Attempt to transition the unassigned node for 7f2d92497d2d03917afd574ea2aca55b
from RS_ZK_REGION_OPENING to                 M_ZK_REGION_OFFLINE failed, the node existed
but was in the state M_ZK_REGION_OFFLINE  45157 2010-10-23 21:37:57,404 INFO org.apache.hadoop.hbase.master.AssignmentManager:
Region transitioned OPENING to OFFLINE so skipping timeout, region=usertable,user510588360,1287547556587.7f2d92497d2d03917afd574ea2aca55b.
 
> ,,,
> {code}
> Timeout period again elapses an then same sequence.
> This is what I've been working on.

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