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https://issues.apache.org/jira/browse/HBASE-4124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13089261#comment-13089261
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ramkrishna.s.vasudevan commented on HBASE-4124:
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@Gao
{bq}
step 3: startup master again .
As per the scenario you have described when the master restarted the RS has it
opened the region? I think the scenario here is RS is also dead.
If so the assignment manager will try assigning it to a new RS. Do you think
any problem here?
If the RS is alive then the znode status will be OPENED state and the
processRIT will take care of clearing the node as it is already opened. Could
be be more clear on the state of RS after you killed the master and also on the
state of znode in zookeeper for that region.
> ZK restarted while assigning a region, new active HM re-assign it but the RS
> warned 'already online on this server'.
> --------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-4124
> URL: https://issues.apache.org/jira/browse/HBASE-4124
> Project: HBase
> Issue Type: Bug
> Components: master
> Reporter: fulin wang
> Assignee: gaojinchao
> Fix For: 0.90.5
>
> Attachments: HBASE-4124_Branch90V1_trial.patch,
> HBASE-4124_Branch90V2.patch, log.txt
>
> Original Estimate: 0.4h
> Remaining Estimate: 0.4h
>
> ZK restarted while assigning a region, new active HM re-assign it but the RS
> warned 'already online on this server'.
> Issue:
> The RS failed besause of 'already online on this server' and return; The HM
> can not receive the message and report 'Regions in transition timed out'.
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