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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2008/06/25 23:32:45 UTC
[jira] Updated: (HBASE-709) Deadlock while rolling WAL-log while
finishing flush
[ https://issues.apache.org/jira/browse/HBASE-709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-709:
------------------------
Status: Patch Available (was: Open)
Please review.
> Deadlock while rolling WAL-log while finishing flush
> ----------------------------------------------------
>
> Key: HBASE-709
> URL: https://issues.apache.org/jira/browse/HBASE-709
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Priority: Blocker
> Fix For: 0.1.3, 0.2.0
>
> Attachments: deadlock.txt
>
>
> Found this in our cluster:
> {code}
> Found one Java-level deadlock:
> =============================
> "IPC Server handler 5 on 60020":
> waiting for ownable synchronizer 0x00007f5f659d4e90, (a java.util.concurrent.locks.ReentrantLock$NonfairSync),
> which is held by "regionserver/0:0:0:0:0:0:0:0:60020.cacheFlusher"
> "regionserver/0:0:0:0:0:0:0:0:60020.cacheFlusher":
> waiting to lock monitor 0x00007f5f56312f78 (object 0x00007f5f659d4ec0, a java.lang.Integer),
> which is held by "IPC Server handler 5 on 60020"
> Java stack information for the threads listed above:
> ===================================================
> "IPC Server handler 5 on 60020":
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00007f5f659d4e90> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
> at java.util.concurrent.locks.LockSupport.park(Unknown Source)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(Unknown Source)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(Unknown Source)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(Unknown Source)
> at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(Unknown Source)
> at java.util.concurrent.locks.ReentrantLock.lock(Unknown Source)
> at org.apache.hadoop.hbase.HLog.rollWriter(HLog.java:219)
> at org.apache.hadoop.hbase.HLog.append(HLog.java:390)
> - locked <0x00007f5f659d4ec0> (a java.lang.Integer)
> at org.apache.hadoop.hbase.HRegion.update(HRegion.java:1633)
> at org.apache.hadoop.hbase.HRegion.batchUpdate(HRegion.java:1436)
> at org.apache.hadoop.hbase.HRegionServer.batchUpdate(HRegionServer.java:1552)
> at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:413)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:901)
> "regionserver/0:0:0:0:0:0:0:0:60020.cacheFlusher":
> at org.apache.hadoop.hbase.HLog.completeCacheFlush(HLog.java:481)
> - waiting to lock <0x00007f5f659d4ec0> (a java.lang.Integer)
> at org.apache.hadoop.hbase.HRegion.internalFlushcache(HRegion.java:1133)
> at org.apache.hadoop.hbase.HRegion.flushcache(HRegion.java:1020)
> at org.apache.hadoop.hbase.HRegionServer$Flusher.flushRegion(HRegionServer.java:446)
> - locked <0x00007f5f659d3ec8> (a java.util.HashSet)
> at org.apache.hadoop.hbase.HRegionServer$Flusher.run(HRegionServer.java:390)
> Found 1 deadlock.
> {code}
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