Rolling restart RS, region could stay in OPENING state
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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
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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