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https://issues.apache.org/jira/browse/HBASE-4124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13091474#comment-13091474
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gaojinchao commented on HBASE-4124:
-----------------------------------
@ Ted
I am making a patch for TRUNK. But I have some questions about TRUNK.
It seems a bug.
In function assign, when we get the return value "ALREADY_OPENED" .
should we update the meta table ? or we do this on region server.
hmaster code:
RegionOpeningState regionOpenState = serverManager.sendRegionOpen(plan
.getDestination(), state.getRegion());
if (regionOpenState == RegionOpeningState.ALREADY_OPENED) {
region server code: if we don't update the meta ,the client may access to the
old server.
HRegion onlineRegion = this.getFromOnlineRegions(region.getEncodedName());
if (null != onlineRegion) {
LOG.warn("Attempted open of " + region.getEncodedName()
+ " but already online on this server");
return RegionOpeningState.ALREADY_OPENED;
}
> ZK restarted while a region is being assigned, new active HM re-assigns it
> but the RS warns '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, HBASE-4124_Branch90V3.patch,
> HBASE-4124_Branch90V4.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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