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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (HBASE-20146) Regions are stuck while opening when WAL is disabled
Date Wed, 14 Mar 2018 22:10:00 GMT

     [ https://issues.apache.org/jira/browse/HBASE-20146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell reopened HBASE-20146:
------------------------------------

Reopened because there is an addendum in progress and some discussion about it. Please commit
the addendum asap as soon as the discussion is settled or revert the original commit. Thanks!

> Regions are stuck while opening when WAL is disabled
> ----------------------------------------------------
>
>                 Key: HBASE-20146
>                 URL: https://issues.apache.org/jira/browse/HBASE-20146
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>    Affects Versions: 1.3.1
>            Reporter: Ashish Singhi
>            Assignee: Ashish Singhi
>            Priority: Critical
>             Fix For: 2.0.0, 3.0.0, 1.3.2, 1.5.0, 1.2.7, 1.4.3
>
>         Attachments: HBASE-20146-addendum.patch, HBASE-20146.patch, HBASE-20146.v1.patch
>
>
> On a running cluster we had set {{hbase.regionserver.hlog.enabled}} to false, to disable
the WAL for complete cluster, after restarting HBase service, regions are not getting opened
leading to HMaster abort as Namespace table regions are not getting assigned. 
> jstack for region open:
> {noformat}
> "RS_OPEN_PRIORITY_REGION-BLR1000006595:16045-1" #159 prio=5 os_prio=0 tid=0x00007fdfa4341000
nid=0x419d waiting on condition [0x00007fdfa0467000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x0000000087554448> (a java.util.concurrent.CountDownLatch$Sync)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:997)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
> at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
> at org.apache.hadoop.hbase.wal.WALKey.getWriteEntry(WALKey.java:98)
> at org.apache.hadoop.hbase.regionserver.wal.WALUtil.writeMarker(WALUtil.java:131)
> at org.apache.hadoop.hbase.regionserver.wal.WALUtil.writeRegionEventMarker(WALUtil.java:88)
> at org.apache.hadoop.hbase.regionserver.HRegion.writeRegionOpenMarker(HRegion.java:1026)
> at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:6849)
> at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:6803)
> at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:6774)
> at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:6730)
> at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:6681)
> at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:363)
> at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:129)
> at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:129)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> This used to work with HBase 1.0.2 version.



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