Re: Solrj possible deadlock

Wed, 23 Sep 2009 16:45:41 -0700 

do you have anything custom going on?

The fact that the lock is in java2d seems suspicious...


On Sep 23, 2009, at 7:01 PM, pof wrote:
I had the same problem again yesterday except the process halted after about 
20mins this time.


pof wrote:


Hello, I was running a batch index the other day using the Solrj
EmbeddedSolrServer when the process abruptly froze in it's tracks after running for about 4-5 hours and indexing ~400K documents. There were no document locks so it would seem likely that there was some kind of thread deadlock. I was hoping someone might be able to tell me some information 
about the following thread dump taken at the time:

Full thread dump OpenJDK Client VM (1.6.0-b09 mixed mode):

"DestroyJavaVM" prio=10 tid=0x9322a800 nid=0xcef waiting on condition
[0x00000000..0x0018a044]
  java.lang.Thread.State: RUNNABLE
"Java2D Disposer" daemon prio=10 tid=0x0a28cc00 nid=0xf1c in Object.wait() 
[0x0311d000..0x0311def4]
  java.lang.Thread.State: WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)
- waiting on <0x97a96840> (a java.lang.ref.ReferenceQueue $Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java: 133) 
       - locked <0x97a96840> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java: 149) 
       at sun.java2d.Disposer.run(Disposer.java:143)
       at java.lang.Thread.run(Thread.java:636)
"pool-1-thread-1" prio=10 tid=0x93a26c00 nid=0xcf7 waiting on condition 
[0x08a6a000..0x08a6b074]
  java.lang.Thread.State: WAITING (parking)
       at sun.misc.Unsafe.park(Native Method)
       - parking to wait for  <0x967acfd0> (a
java.util.concurrent.locks.AbstractQueuedSynchronizer $ConditionObject) 
       at
java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
       at
java.util.concurrent.locks.AbstractQueuedSynchronizer $ConditionObject.await(AbstractQueuedSynchronizer.java:1978) 
       at
java .util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java: 386) 
       at
java .util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java: 1043) 
       at
java .util .concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java: 1103) 
       at
java.util.concurrent.ThreadPoolExecutor $Worker.run(ThreadPoolExecutor.java:603) 
       at java.lang.Thread.run(Thread.java:636)
"Low Memory Detector" daemon prio=10 tid=0x93a00c00 nid=0xcf5 runnable 
[0x00000000..0x00000000]
  java.lang.Thread.State: RUNNABLE

"CompilerThread0" daemon prio=10 tid=0x09fe9800 nid=0xcf4 waiting on
condition [0x00000000..0x096a7af4]
  java.lang.Thread.State: RUNNABLE
"Signal Dispatcher" daemon prio=10 tid=0x09fe8800 nid=0xcf3 waiting on 
condition [0x00000000..0x00000000]
  java.lang.Thread.State: RUNNABLE

"Finalizer" daemon prio=10 tid=0x09fd7000 nid=0xcf2 in Object.wait()
[0x005ca000..0x005caef4]
  java.lang.Thread.State: WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)
- waiting on <0x966e6d40> (a java.lang.ref.ReferenceQueue $Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java: 133) 
       - locked <0x966e6d40> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java: 149) at java.lang.ref.Finalizer $FinalizerThread.run(Finalizer.java:177) 

"Reference Handler" daemon prio=10 tid=0x09fd2c00 nid=0xcf1 in
Object.wait() [0x00579000..0x00579d74]
  java.lang.Thread.State: WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)
       - waiting on <0x966e6dc8> (a java.lang.ref.Reference$Lock)
       at java.lang.Object.wait(Object.java:502)
       at
java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)
       - locked <0x966e6dc8> (a java.lang.ref.Reference$Lock)

"VM Thread" prio=10 tid=0x09fcf800 nid=0xcf0 runnable

"VM Periodic Task Thread" prio=10 tid=0x93a02400 nid=0xcf6 waiting on
condition

JNI global references: 1072

Heap
def new generation total 36288K, used 23695K [0x93f10000, 0x96670000, 
0x96670000)
 eden space 32256K,  73% used [0x93f10000, 0x95633f60, 0x95e90000)
 from space 4032K,   0% used [0x95e90000, 0x95e90000, 0x96280000)
 to   space 4032K,   0% used [0x96280000, 0x96280000, 0x96670000)
tenured generation total 483968K, used 72129K [0x96670000, 0xb3f10000, 
0xb3f10000)
  the space 483968K,  14% used [0x96670000, 0x9ace04b8, 0x9ace0600,
0xb3f10000)
compacting perm gen total 23040K, used 22983K [0xb3f10000, 0xb5590000, 
0xb7f10000)
  the space 23040K,  99% used [0xb3f10000, 0xb5581ff8, 0xb5582000,
0xb5590000)
No shared spaces configured.

Cheers. Brett.



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