[hbase] OOME makes zombie of region server
------------------------------------------
Key: HADOOP-1813
URL: https://issues.apache.org/jira/browse/HADOOP-1813
Project: Hadoop
Issue Type: Bug
Components: contrib/hbase
Reporter: stack
Priority: Minor
We need to catch Errors in the main regionserver and master run methods.
During a cluster loading, an OOME made main thread exit but server stayed up
doing a zombie-impersonation. For OOME's we could add an attempted handler.
Service threads also need to be 'daemon'-ified. Here's an extract from thread
dump of hung region server:
{code}
Full thread dump Java HotSpot(TM) Server VM (1.6.0_01-b06 mixed mode):
...
"Lease.monitor" prio=10 tid=0x082ec800 nid=0x41ca waiting on condition
[0xb122d000..0xb122df30]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at org.apache.hadoop.hbase.Leases$LeaseMonitor.run(Leases.java:226)
at java.lang.Thread.run(Thread.java:619)
"Thread-10.logRoller" prio=10 tid=0x082eb400 nid=0x41c9 waiting on condition
[0xb127e000..0xb127eeb0]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at
org.apache.hadoop.hbase.HRegionServer$LogRoller.run(HRegionServer.java:379)
at java.lang.Thread.run(Thread.java:619)
"Thread-10.cacheFlusher" prio=10 tid=0x082ea000 nid=0x41c7 waiting on condition
[0xb1320000..0xb1320fb0]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at
org.apache.hadoop.hbase.HRegionServer$Flusher.run(HRegionServer.java:325)
at java.lang.Thread.run(Thread.java:619)
"Thread-10.worker" prio=10 tid=0x082e9400 nid=0x41c6 waiting on condition
[0xb1371000..0xb1372130]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0xb649a288> (a
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:1927)
at
java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:395)
at
org.apache.hadoop.hbase.HRegionServer$Worker.run(HRegionServer.java:859)
at java.lang.Thread.run(Thread.java:619)
...
{code}
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