[HBASE-7698] race between RS shutdown thread and openregionhandler causes region to get stuck

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.94.6, 0.95.0
• Fix Version/s: 0.94.5, 0.95.0
• Hadoop Flags: Reviewed
• Assignee: ramkrishna.s.vasudevan
• Reporter: Sergey Shelukhin
• Created: 28/Jan/13 22:26
• Updated: 05/Mar/13 07:52
• Resolved: 07/Feb/13 18:13

Description

2013-01-22 17:59:03,237 INFO [Shutdown of org.apache.hadoop.hbase.fs.HFileSystem@5984cf08] hbase.MiniHBaseCluster$SingleFileSystemShutdownThread(186): Hook closing fs=org.apache.hadoop.hbase.fs.HFileSystem@5984cf08
...
2013-01-22 17:59:03,411 DEBUG [RS_OPEN_REGION-10.11.2.92,50661,1358906192942-0] regionserver.HRegion(1001): Closing IntegrationTestRebalanceAndKillServersTargeted,66666660,1358906196709.0200b366bc37c5afd1185f7d487c7dfb.: disabling compactions & flushes
2013-01-22 17:59:03,411 DEBUG [RS_OPEN_REGION-10.11.2.92,50661,1358906192942-0] regionserver.HRegion(1023): Updates disabled for region IntegrationTestRebalanceAndKillServersTargeted,66666660,1358906196709.0200b366bc37c5afd1185f7d487c7dfb.
2013-01-22 17:59:03,415 ERROR [RS_OPEN_REGION-10.11.2.92,50661,1358906192942-0] executor.EventHandler(205): Caught throwable while processing event M_RS_OPEN_REGION
java.io.IOException: java.io.IOException: java.io.IOException: Filesystem closed
at org.apache.hadoop.hbase.regionserver.HRegion.doClose(HRegion.java:1058)
at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:974)
at org.apache.hadoop.hbase.regionserver.HRegion.close(HRegion.java:945)
at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.cleanupFailedOpen(OpenRegionHandler.java:459)
at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:143)
at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:202)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)

tryTransitionFromOpeningToFailedOpen or transitionToOpened below is never called and region can get stuck.
As an added benefit, the meta is already written by that time.

Issue Links

• relates to: HBASE-7520 org.apache.hadoop.hbase.IntegrationTestRebalanceAndKillServersTargeted fails when I cd hbase-it and mvn verify