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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2011/09/23 18:48:26 UTC
[jira] [Resolved] (HBASE-4446) Rolling restart RSs scenario,
regions could stay in OPENING state
[ https://issues.apache.org/jira/browse/HBASE-4446?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack resolved HBASE-4446.
--------------------------
Resolution: Fixed
Hadoop Flags: [Reviewed]
Committed to 0.92 branch and trunk. Thanks for the patch Ming.
> Rolling restart RSs scenario, regions could stay in OPENING state
> -----------------------------------------------------------------
>
> Key: HBASE-4446
> URL: https://issues.apache.org/jira/browse/HBASE-4446
> Project: HBase
> Issue Type: Bug
> Components: master
> Reporter: Ming Ma
> Assignee: Ming Ma
> Fix For: 0.92.0
>
> Attachments: HBASE-4446-trunk.patch
>
>
> Keep Master up all the time, do rolling restart of RSs like this - stop RS1, wait for 2 seconds, stop RS2, start RS1, wait for 2 seconds, stop RS3, start RS2, wait for 2 seconds, etc. Region sometimes can just stay in OPENING state even after timeoutmonitor period.
> 2011-09-19 08:10:33,131 WARN org.apache.hadoop.hbase.master.AssignmentManager: While timing out a region in state OPENING, found ZK node in unexpected state: RS_ZK_REGION_FAILED_OPEN
> The issue - RS was shutdown when a region is being opened, it was transitioned to RS_ZK_REGION_FAILED_OPEN in ZK. In timeoutmonitor, it didn't take care of RS_ZK_REGION_FAILED_OPEN.
> processOpeningState
> ...
> else if (dataInZNode.getEventType() != EventType.RS_ZK_REGION_OPENING &&
> LOG.warn("While timing out a region in state OPENING, "
> + "found ZK node in unexpected state: "
> + dataInZNode.getEventType());
> return;
> }
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