W dniu 21.05.2016 o 17:25, Andrea Aime pisze:
> If that's not your case, looking at a jstack output may help identify
> the issue.
> Normally this lockups are due to control-flow not receiving the notification
> that a request completed, or by requests not completing at all.

I have now:

INFO [geoserver.flow] - Running requests: 0, blocked requests: 23

and jstack gives me 52 threads with TIMED_WAITING state

with two kinds of stack:

"http-apr-8443-exec-21" #25008 daemon prio=5 os_prio=0 
tid=0x00007f42d8021000 nid=0x655 waiting on condition [0x00007f423bffe000]
    java.lang.Thread.State: TIMED_WAITING (parking)
         at sun.misc.Unsafe.park(Native Method)
         - parking to wait for  <0x00000004c5330050> (a 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:467)
         at org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:86)
         at org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:32)
         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066)
         at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
         at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
         at java.lang.Thread.run(Thread.java:745)

or

"http-apr-8443-exec-12" #24999 daemon prio=5 os_prio=0 
tid=0x00007f42d8016800 nid=0x64c waiting on condition [0x00007f423b4f1000]
    java.lang.Thread.State: TIMED_WAITING (parking)
         at sun.misc.Unsafe.park(Native Method)
         - parking to wait for  <0x00000004c1d9dac0> (a 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
java.util.concurrent.ArrayBlockingQueue.offer(ArrayBlockingQueue.java:379)
         at 
org.geoserver.flow.controller.SingleQueueFlowController.requestIncoming(SingleQueueFlowController.java:58)
         at 
org.geoserver.flow.ControlFlowCallback.operationDispatched(ControlFlowCallback.java:139)
         at 
org.geoserver.ows.Dispatcher.fireOperationDispatchedCallback(Dispatcher.java:800)
         at org.geoserver.ows.Dispatcher.dispatch(Dispatcher.java:795)
         at 
org.geoserver.ows.Dispatcher.handleRequestInternal(Dispatcher.java:265)
         at 
org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
...



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