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https://issues.apache.org/jira/browse/HBASE-5916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13284485#comment-13284485
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ramkrishna.s.vasudevan edited comment on HBASE-5916 at 5/28/12 5:32 PM:
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Committed to trunk and 0.94.
Thanks for the review Chunhui, Ted and Stack.
Thanks to Rajesh for his patches also.
was (Author: ram_krish):
Committed to trunk and 0.94.
Thanks for the review Chunhui, Ted and Stack.
Thanks for Rajesh for his patches also.
> RS restart just before master intialization we make the cluster non operative
> -----------------------------------------------------------------------------
>
> Key: HBASE-5916
> URL: https://issues.apache.org/jira/browse/HBASE-5916
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.1, 0.94.0
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Priority: Critical
> Fix For: 0.96.0, 0.94.1
>
> Attachments: HBASE-5916_94.patch, HBASE-5916_trunk.patch,
> HBASE-5916_trunk_1.patch, HBASE-5916_trunk_1.patch, HBASE-5916_trunk_2.patch,
> HBASE-5916_trunk_3.patch, HBASE-5916_trunk_4.patch,
> HBASE-5916_trunk_v5.patch, HBASE-5916_trunk_v6.patch,
> HBASE-5916_trunk_v7.patch, HBASE-5916_trunk_v8.patch,
> HBASE-5916_trunk_v9.patch, HBASE-5916v8.patch
>
>
> Consider a case where my master is getting restarted. RS that was alive when
> the master restart started, gets restarted before the master initializes the
> ServerShutDownHandler.
> {code}
> serverShutdownHandlerEnabled = true;
> {code}
> In this case when the RS tries to register with the master, the master will
> try to expire the server but the server cannot be expired as still the
> serverShutdownHandler is not enabled.
> This case may happen when i have only one RS gets restarted or all the RS
> gets restarted at the same time.(before assignRootandMeta).
> {code}
> LOG.info(message);
> if (existingServer.getStartcode() < serverName.getStartcode()) {
> LOG.info("Triggering server recovery; existingServer " +
> existingServer + " looks stale, new server:" + serverName);
> expireServer(existingServer);
> }
> {code}
> If another RS is brought up then the cluster comes back to normalcy.
> May be a very corner case.
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