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
