deadlock between put and cacheflusher in 0.20 branch
----------------------------------------------------
Key: HBASE-2322
URL: https://issues.apache.org/jira/browse/HBASE-2322
Project: Hadoop HBase
Issue Type: Bug
Reporter: stack
Assignee: stack
Priority: Blocker
Fix For: 0.20.4, 0.21.0
{code}
Found one Java-level deadlock:
=============================
"IPC Server handler 59 on 60020":
waiting for ownable synchronizer 0x00007fec9eb050f8, (a
java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
which is held by "IPC Server handler 54 on 60020"
"IPC Server handler 54 on 60020":
waiting to lock monitor 0x000000004190e950 (object 0x00007fec64f25258, a
java.util.HashSet),
which is held by "regionserver/10.20.20.186:60020.cacheFlusher"
"regionserver/10.20.20.186:60020.cacheFlusher":
waiting for ownable synchronizer 0x00007fec651df998, (a
java.util.concurrent.locks.ReentrantLock$NonfairSync),
which is held by "IPC Server handler 19 on 60020"
"IPC Server handler 19 on 60020":
waiting for ownable synchronizer 0x00007fec9eb050f8, (a
java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
which is held by "IPC Server handler 54 on 60020"
Java stack information for the threads listed above:
===================================================
"IPC Server handler 59 on 60020":
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00007fec9eb050f8> (a
java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:778)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1114)
at
java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:807)
at org.apache.hadoop.hbase.regionserver.HRegion.put(HRegion.java:1299)
at org.apache.hadoop.hbase.regionserver.HRegion.put(HRegion.java:1281)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.put(HRegionServer.java:1789)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:577)
at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:915)
"IPC Server handler 54 on 60020":
at
org.apache.hadoop.hbase.regionserver.MemStoreFlusher.request(MemStoreFlusher.java:172)
- waiting to lock <0x00007fec64f25258> (a java.util.HashSet)
at
org.apache.hadoop.hbase.regionserver.HRegion.requestFlush(HRegion.java:1549)
at org.apache.hadoop.hbase.regionserver.HRegion.put(HRegion.java:1534)
at org.apache.hadoop.hbase.regionserver.HRegion.put(HRegion.java:1318)
at org.apache.hadoop.hbase.regionserver.HRegion.put(HRegion.java:1281)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.put(HRegionServer.java:1789)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:577)
at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:915)
"regionserver/10.20.20.186:60020.cacheFlusher":
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00007fec651df998> (a
java.util.concurrent.locks.ReentrantLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:778)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1114)
at
java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:186)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:262)
at
org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:235)
- locked <0x00007fec64f25258> (a java.util.HashSet)
at
org.apache.hadoop.hbase.regionserver.MemStoreFlusher.run(MemStoreFlusher.java:149)
"IPC Server handler 19 on 60020":
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00007fec9eb050f8> (a
java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:778)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1114)
at
java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:807)
at
org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:980)
at
org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:873)
at
org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:241)
at
org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushSomeRegions(MemStoreFlusher.java:352)
- locked <0x00007fec64ed96f0> (a
org.apache.hadoop.hbase.regionserver.MemStoreFlusher)
at
org.apache.hadoop.hbase.regionserver.MemStoreFlusher.reclaimMemStoreMemory(MemStoreFlusher.java:321)
- locked <0x00007fec64ed96f0> (a
org.apache.hadoop.hbase.regionserver.MemStoreFlusher)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.put(HRegionServer.java:1783)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:577)
at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:915)
Found 1 deadlock.
{code}
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