[
https://issues.apache.org/jira/browse/HBASE-3627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13006518#comment-13006518
]
Todd Lipcon commented on HBASE-3627:
------------------------------------
This was also reported on the cdh-user list.
> NPE in EventHandler when region already reassigned
> --------------------------------------------------
>
> Key: HBASE-3627
> URL: https://issues.apache.org/jira/browse/HBASE-3627
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.90.1
> Reporter: Jean-Daniel Cryans
> Priority: Critical
> Fix For: 0.90.2
>
>
> When a region takes too long to open, it will try to update the unassigned
> znode and will fail on an ugly NPE like this:
> {quote}
> DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
> regionserver:60020-0x22dc571dde04ca7 Attempting to transition node
> 0519dc3b62a569347526875048c37faa from RS_ZK_REGION_OPENING to
> RS_ZK_REGION_OPENING
> DEBUG org.apache.hadoop.hbase.zookeeper.ZKUtil:
> regionserver:60020-0x22dc571dde04ca7 Unable to get data of znode
> /hbase/unassigned/0519dc3b62a569347526875048c37faa because node does not
> exist (not necessarily an error)
> ERROR org.apache.hadoop.hbase.executor.EventHandler: Caught throwable while
> processing event M_RS_OPEN_REGION
> java.lang.NullPointerException
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:75)
> at
> org.apache.hadoop.hbase.executor.RegionTransitionData.fromBytes(RegionTransitionData.java:198)
> at
> org.apache.hadoop.hbase.zookeeper.ZKAssign.transitionNode(ZKAssign.java:672)
> at
> org.apache.hadoop.hbase.zookeeper.ZKAssign.retransitionNodeOpening(ZKAssign.java:585)
> at
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.tickleOpening(OpenRegionHandler.java:322)
> at
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:97)
> at
> org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:151)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> {quote}
> I think the region server in this case should be closing the region ASAP.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
