Re: [jira] Commented: (FELIX-951) Deadlock in iPojo when stopping Felix

Sun, 22 Feb 2009 23:36:03 -0800 

Hi,

Yes, you can close it.
As it does not require a fix/improvement on the iPOJO side, it can be closed. 


I only keep opened and resolved issues requiring a fix or providing an  
improvement. I do this just because of the ability of Jira to generate  
release notes :-). So when I cut a release I can track every changes  
quickly and generate the changelog file easily. Once the release is  
done, I close all the issue related to the released version. However,  
this is my own strategy.


Regards,

Clement


On 21.02.2009, at 18:22, David GAY (JIRA) wrote:




   [ https://issues.apache.org/jira/browse/FELIX-951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12675581 
#action_12675581 ]


David GAY commented on FELIX-951:
---------------------------------

Hi,

I've tested with a fresh trunk version today.
And very good news : there is no more deadlock !

I made a simple test : a iPojo like that inside a bundle :

@Component
@Provides
public class DarkStarServiceImpl implements DarkStarService
{
  // .... bla bla bla

  @Validate
  public void buildDarkStar()
  {
      // Gives me some time to build an artificial moon please !!!
      try { Thread.sleep( 100000 ); } catch (Exception ex ) {}
  }

  // ... bla bla bla
}


run it and type shutdown in the console ... with Felix 1.4.1 the  
server never stop.
With the today's trunk version (1.5.0-SNAPSHOT) the server stop.  
Excellent !


Thanks again for your help. Keep the good work.


PS: I don't know if it's my role to close issue. Please let me known  
what the correct procedure is.



Bon week end. Salut et merci.



Deadlock in iPojo when stopping Felix
-------------------------------------

               Key: FELIX-951
               URL: https://issues.apache.org/jira/browse/FELIX-951
           Project: Felix
        Issue Type: Bug
        Components: iPOJO
  Affects Versions: iPOJO-1.2.0
       Environment: JDK 1.6 / Windows XP
          Reporter: David GAY
          Priority: Critical


I suspect a deadlock when iPojo register services while Felix  
framework stopping the bundles (shutdown)

This is the thread dump of the JVM :

Full thread dump Java HotSpot(TM) Client VM (11.0-b16 mixed mode,  
sharing):
"FelixShutdown" daemon prio=6 tid=0x030ba400 nid=0x1168 in  
Object.wait() [0x03b1f000..0x03b1fc14]

  java.lang.Thread.State: WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)
       - waiting on <0x230fb080> (a java.lang.Integer)
       at java.lang.Object.wait(Object.java:485)

       at  
org 
.apache 
.felix 
.framework.StartLevelImpl.setStartLevelAndWait(StartLevelImpl.java: 
136)

       - locked <0x230fb080> (a java.lang.Integer)

       at org.apache.felix.framework.Felix 
$SystemBundleActivator.run(Felix.java:3876)

       at java.lang.Thread.run(Thread.java:619)

"RMI TCP Connection(idle)" daemon prio=6 tid=0x03542800 nid=0x1478  
waiting on condition [0x03a7f000..0x03a7fd94]

  java.lang.Thread.State: TIMED_WAITING (parking)
       at sun.misc.Unsafe.park(Native Method)

       - parking to wait for  <0x22eaeec8> (a  
java.util.concurrent.SynchronousQueue$TransferStack)
       at  
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java: 
198)
       at java.util.concurrent.SynchronousQueue 
$TransferStack.awaitFulfill(SynchronousQueue.java:424)
       at java.util.concurrent.SynchronousQueue 
$TransferStack.transfer(SynchronousQueue.java:323)
       at  
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:874)
       at  
java 
.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java: 
945)
       at java.util.concurrent.ThreadPoolExecutor 
$Worker.run(ThreadPoolExecutor.java:907)

       at java.lang.Thread.run(Thread.java:619)

"RMI TCP Connection(idle)" daemon prio=6 tid=0x03548800 nid=0x14e0  
waiting on condition [0x03a2f000..0x03a2fa14]

  java.lang.Thread.State: TIMED_WAITING (parking)
       at sun.misc.Unsafe.park(Native Method)

       - parking to wait for  <0x22eaeec8> (a  
java.util.concurrent.SynchronousQueue$TransferStack)
       at  
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java: 
198)
       at java.util.concurrent.SynchronousQueue 
$TransferStack.awaitFulfill(SynchronousQueue.java:424)
       at java.util.concurrent.SynchronousQueue 
$TransferStack.transfer(SynchronousQueue.java:323)
       at  
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:874)
       at  
java 
.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java: 
945)
       at java.util.concurrent.ThreadPoolExecutor 
$Worker.run(ThreadPoolExecutor.java:907)

       at java.lang.Thread.run(Thread.java:619)

"Prototyper" daemon prio=6 tid=0x030bb400 nid=0x146c in  
Object.wait() [0x039df000..0x039dfa94]

  java.lang.Thread.State: WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)

       - waiting on <0x230ec668> (a  
org.logicalcobwebs.proxool.PrototyperThread)

       at java.lang.Object.wait(Object.java:485)

       at  
org 
.logicalcobwebs 
.proxool.PrototyperThread.doWait(PrototyperThread.java:69)
       - locked <0x230ec668> (a  
org.logicalcobwebs.proxool.PrototyperThread)
       at  
org 
.logicalcobwebs.proxool.PrototyperThread.run(PrototyperThread.java: 
58)
"HouseKeeper" daemon prio=6 tid=0x030c4400 nid=0x14c4 waiting on  
condition [0x0398f000..0x0398fb14]

  java.lang.Thread.State: TIMED_WAITING (sleeping)
       at java.lang.Thread.sleep(Native Method)

       at  
org 
.logicalcobwebs 
.proxool.HouseKeeperThread.run(HouseKeeperThread.java:46)
"SelectorThread-9998" daemon prio=6 tid=0x03064400 nid=0x14d8  
runnable [0x0353f000..0x0353fb94]

  java.lang.Thread.State: RUNNABLE

       at sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native  
Method)
       at sun.nio.ch.WindowsSelectorImpl 
$SubSelector.poll(WindowsSelectorImpl.java:274)
       at sun.nio.ch.WindowsSelectorImpl$SubSelector.access 
$400(WindowsSelectorImpl.java:256)
       at  
sun.nio.ch.WindowsSelectorImpl.doSelect(WindowsSelectorImpl.java:137)
       at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java: 
69)

       - locked <0x23095600> (a sun.nio.ch.Util$1)

       - locked <0x23095610> (a java.util.Collections 
$UnmodifiableSet)

       - locked <0x23095588> (a sun.nio.ch.WindowsSelectorImpl)
       at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)

       at  
com.sun.grizzly.TCPSelectorHandler.select(TCPSelectorHandler.java: 
483)

       at com.sun.grizzly.Controller.doSelect(Controller.java:372)

       at  
com 
.sun.grizzly.SelectorHandlerRunner.run(SelectorHandlerRunner.java:82)
       at  
com 
.sun.grizzly.Controller.startSelectorHandlerRunner(Controller.java: 
1169)

       at com.sun.grizzly.Controller.start(Controller.java:976)

       at  
com 
.sun.grizzly.http.SelectorThread.startListener(SelectorThread.java: 
1148)

       - locked <0x22fa95f0> (a java.lang.Object)

       at  
com.sun.grizzly.http.SelectorThread.run(SelectorThread.java:1000)
"JMX server connection timeout 20" daemon prio=6 tid=0x02fed800  
nid=0x1300 in Object.wait() [0x034ef000..0x034efc14]

  java.lang.Thread.State: TIMED_WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)
       - waiting on <0x22f56378> (a [I)

       at com.sun.jmx.remote.internal.ServerCommunicatorAdmin 
$Timeout.run(ServerCommunicatorAdmin.java:150)

       - locked <0x22f56378> (a [I)
       at java.lang.Thread.run(Thread.java:619)

"Thread-1" daemon prio=6 tid=0x02fc0c00 nid=0x1324 in Object.wait()  
[0x0349f000..0x0349fc94]

  java.lang.Thread.State: WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)
       - waiting on <0x22eb5318> (a [Ljava.lang.Object;)
       at java.lang.Object.wait(Object.java:485)

       at  
org.apache.felix.framework.Felix.acquireBundleLock(Felix.java:4227)

       - locked <0x22eb5318> (a [Ljava.lang.Object;)

       at  
org.apache.felix.framework.Felix.registerService(Felix.java:2736)
       at  
org 
.apache 
.felix 
.framework.BundleContextImpl.registerService(BundleContextImpl.java: 
252)
       at  
org 
.apache.felix.ipojo.IPojoContext.registerService(IPojoContext.java: 
336)
       at  
org 
.apache 
.felix 
.ipojo 
.handlers 
.providedservice 
.ProvidedService.registerService(ProvidedService.java:285)
       - locked <0x230c7630> (a  
org.apache.felix.ipojo.handlers.providedservice.ProvidedService)
       at  
org 
.apache 
.felix 
.ipojo 
.handlers 
.providedservice 
.ProvidedServiceHandler.__stateChanged(ProvidedServiceHandler.

java:441)

       at  
org 
.apache 
.felix 
.ipojo 
.handlers 
.providedservice 
.ProvidedServiceHandler.stateChanged(ProvidedServiceHandler.ja

va)

       at  
org 
.apache.felix.ipojo.InstanceManager.setState(InstanceManager.java: 
428)
       at  
org.apache.felix.ipojo.InstanceManager.start(InstanceManager.java: 
309)
       at  
org 
.apache 
.felix.ipojo.ComponentFactory.createInstance(ComponentFactory.java: 
155)
       at  
org 
.apache 
.felix.ipojo.IPojoFactory.createComponentInstance(IPojoFactory.java: 
283)
       - locked <0x230a5ac0> (a  
org.apache.felix.ipojo.ComponentFactory)
       at  
org 
.apache 
.felix.ipojo.IPojoFactory.createComponentInstance(IPojoFactory.java: 
220)
       at org.apache.felix.ipojo.InstanceCreator 
$ManagedInstance.create(InstanceCreator.java:349)
       at  
org 
.apache 
.felix.ipojo.InstanceCreator.addInstance(InstanceCreator.java:84)
       - locked <0x22f31748> (a  
org.apache.felix.ipojo.InstanceCreator)

       at org.apache.felix.ipojo.Extender.parse(Extender.java:269)

       at  
org.apache.felix.ipojo.Extender.startManagementFor(Extender.java:208)
       at org.apache.felix.ipojo.Extender.access$600(Extender.java: 
52)
       at org.apache.felix.ipojo.Extender 
$CreatorThread.run(Extender.java:669)

       at java.lang.Thread.run(Thread.java:619)

"RMI TCP Connection(2)-172.16.173.69" daemon prio=6 tid=0x02f73c00  
nid=0x1338 runnable [0x0344f000..0x0344fd14]

  java.lang.Thread.State: RUNNABLE
       at java.net.SocketInputStream.socketRead0(Native Method)
       at java.net.SocketInputStream.read(SocketInputStream.java:129)

       at java.io.BufferedInputStream.fill(BufferedInputStream.java: 
218)
       at java.io.BufferedInputStream.read(BufferedInputStream.java: 
237)

       - locked <0x22f58548> (a java.io.BufferedInputStream)
       at java.io.FilterInputStream.read(FilterInputStream.java:66)

       at  
sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java: 
517)
       at sun.rmi.transport.tcp.TCPTransport 
$ConnectionHandler.run0(TCPTransport.java:790)
       at sun.rmi.transport.tcp.TCPTransport 
$ConnectionHandler.run(TCPTransport.java:649)
       at java.util.concurrent.ThreadPoolExecutor 
$Worker.runTask(ThreadPoolExecutor.java:886)
       at java.util.concurrent.ThreadPoolExecutor 
$Worker.run(ThreadPoolExecutor.java:908)

       at java.lang.Thread.run(Thread.java:619)

"RMI Scheduler(0)" daemon prio=6 tid=0x02f90800 nid=0xddc waiting  
on condition [0x033ff000..0x033ffd94]

  java.lang.Thread.State: TIMED_WAITING (parking)
       at sun.misc.Unsafe.park(Native Method)

       - parking to wait for  <0x22eb1098> (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.j

ava:1963)
       at java.util.concurrent.DelayQueue.take(DelayQueue.java:164)

       at java.util.concurrent.ScheduledThreadPoolExecutor 
$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:583)
       at java.util.concurrent.ScheduledThreadPoolExecutor 
$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:576)
       at  
java 
.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java: 
947)
       at java.util.concurrent.ThreadPoolExecutor 
$Worker.run(ThreadPoolExecutor.java:907)

       at java.lang.Thread.run(Thread.java:619)

"RMI TCP Connection(1)-172.16.173.69" daemon prio=6 tid=0x02fbf800  
nid=0x137c runnable [0x033af000..0x033afa14]

  java.lang.Thread.State: RUNNABLE
       at java.net.SocketInputStream.socketRead0(Native Method)
       at java.net.SocketInputStream.read(SocketInputStream.java:129)

       at java.io.BufferedInputStream.fill(BufferedInputStream.java: 
218)
       at java.io.BufferedInputStream.read(BufferedInputStream.java: 
237)

       - locked <0x22f44358> (a java.io.BufferedInputStream)
       at java.io.FilterInputStream.read(FilterInputStream.java:66)

       at  
sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java: 
517)
       at sun.rmi.transport.tcp.TCPTransport 
$ConnectionHandler.run0(TCPTransport.java:790)
       at sun.rmi.transport.tcp.TCPTransport 
$ConnectionHandler.run(TCPTransport.java:649)
       at java.util.concurrent.ThreadPoolExecutor 
$Worker.runTask(ThreadPoolExecutor.java:886)
       at java.util.concurrent.ThreadPoolExecutor 
$Worker.run(ThreadPoolExecutor.java:908)

       at java.lang.Thread.run(Thread.java:619)

"telnetconsole.Listener" daemon prio=6 tid=0x02fa7c00 nid=0x12fc  
runnable [0x0335f000..0x0335fa94]

  java.lang.Thread.State: RUNNABLE
       at java.net.PlainSocketImpl.socketAccept(Native Method)
       at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
       - locked <0x22f27e68> (a java.net.SocksSocketImpl)
       at java.net.ServerSocket.implAccept(ServerSocket.java:453)
       at java.net.ServerSocket.accept(ServerSocket.java:421)

       at org.apache.felix.shell.remote.Listener 
$Acceptor.run(Listener.java:109)

       at java.lang.Thread.run(Thread.java:619)

"FelixPackageAdmin" daemon prio=6 tid=0x02f80400 nid=0x1040 in  
Object.wait() [0x0330f000..0x0330fb14]

  java.lang.Thread.State: WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)

       - waiting on <0x22f23510> (a  
org.apache.felix.framework.PackageAdminImpl)

       at java.lang.Object.wait(Object.java:485)

       at  
org 
.apache.felix.framework.PackageAdminImpl.run(PackageAdminImpl.java: 
322)
       - locked <0x22f23510> (a  
org.apache.felix.framework.PackageAdminImpl)

       at java.lang.Thread.run(Thread.java:619)

"FelixStartLevel" daemon prio=6 tid=0x02f65400 nid=0x1304 waiting  
for monitor entry [0x032bf000..0x032bfb94]

  java.lang.Thread.State: BLOCKED (on object monitor)

       at  
org 
.apache 
.felix 
.ipojo.IPojoFactory.removeFactoryStateListener(IPojoFactory.java:470)
       - waiting to lock <0x230a5ac0> (a  
org.apache.felix.ipojo.ComponentFactory)
       at  
org 
.apache 
.felix.ipojo.InstanceCreator.removeFactory(InstanceCreator.java:182)
       at  
org.apache.felix.ipojo.Extender.closeManagementFor(Extender.java:156)
       at  
org.apache.felix.ipojo.Extender.bundleChanged(Extender.java:129)

       - locked <0x22f2ff28> (a org.apache.felix.ipojo.Extender)

       at  
org 
.apache 
.felix 
.framework 
.util 
.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java: 
745)
       at  
org 
.apache 
.felix 
.framework 
.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:674)
       at  
org 
.apache 
.felix 
.framework 
.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:587)
       at  
org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:3629)
       at org.apache.felix.framework.Felix._stopBundle(Felix.java: 
2076)
       at org.apache.felix.framework.Felix.stopBundle(Felix.java: 
2034)
       at  
org.apache.felix.framework.Felix.setFrameworkStartLevel(Felix.java: 
1197)
       at  
org.apache.felix.framework.StartLevelImpl.run(StartLevelImpl.java: 
265)

       at java.lang.Thread.run(Thread.java:619)

"FelixDispatchQueue" prio=6 tid=0x02f75800 nid=0x11a8 in  
Object.wait() [0x0326f000..0x0326fc14]

  java.lang.Thread.State: WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)
       - waiting on <0x22ebfce0> (a java.util.ArrayList)
       at java.lang.Object.wait(Object.java:485)

       at  
org 
.apache 
.felix.framework.util.EventDispatcher.run(EventDispatcher.java:849)

       - locked <0x22ebfce0> (a java.util.ArrayList)

       at org.apache.felix.framework.util.EventDispatcher.access 
$000(EventDispatcher.java:45)
       at org.apache.felix.framework.util.EventDispatcher 
$1.run(EventDispatcher.java:97)

       at java.lang.Thread.run(Thread.java:619)

"RMI TCP Accept-0" daemon prio=6 tid=0x02f30c00 nid=0x5e4 runnable  
[0x031bf000..0x031bfd14]

  java.lang.Thread.State: RUNNABLE
       at java.net.PlainSocketImpl.socketAccept(Native Method)
       at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
       - locked <0x22ea5788> (a java.net.SocksSocketImpl)
       at java.net.ServerSocket.implAccept(ServerSocket.java:453)
       at java.net.ServerSocket.accept(ServerSocket.java:421)

       at sun.management.jmxremote.LocalRMIServerSocketFactory 
$1.accept(LocalRMIServerSocketFactory.java:34)
       at sun.rmi.transport.tcp.TCPTransport 
$AcceptLoop.executeAcceptLoop(TCPTransport.java:369)
       at sun.rmi.transport.tcp.TCPTransport 
$AcceptLoop.run(TCPTransport.java:341)

       at java.lang.Thread.run(Thread.java:619)

"RMI TCP Accept-1199" daemon prio=6 tid=0x02f29c00 nid=0x8dc  
runnable [0x0316f000..0x0316fd94]

  java.lang.Thread.State: RUNNABLE
       at java.net.PlainSocketImpl.socketAccept(Native Method)
       at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
       - locked <0x22ea5978> (a java.net.SocksSocketImpl)
       at java.net.ServerSocket.implAccept(ServerSocket.java:453)
       at java.net.ServerSocket.accept(ServerSocket.java:421)

       at sun.rmi.transport.tcp.TCPTransport 
$AcceptLoop.executeAcceptLoop(TCPTransport.java:369)
       at sun.rmi.transport.tcp.TCPTransport 
$AcceptLoop.run(TCPTransport.java:341)

       at java.lang.Thread.run(Thread.java:619)

"RMI TCP Accept-0" daemon prio=6 tid=0x02f25c00 nid=0x1138 runnable  
[0x0311f000..0x0311fa14]

  java.lang.Thread.State: RUNNABLE
       at java.net.PlainSocketImpl.socketAccept(Native Method)
       at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
       - locked <0x22ea5b68> (a java.net.SocksSocketImpl)
       at java.net.ServerSocket.implAccept(ServerSocket.java:453)
       at java.net.ServerSocket.accept(ServerSocket.java:421)

       at sun.rmi.transport.tcp.TCPTransport 
$AcceptLoop.executeAcceptLoop(TCPTransport.java:369)
       at sun.rmi.transport.tcp.TCPTransport 
$AcceptLoop.run(TCPTransport.java:341)

       at java.lang.Thread.run(Thread.java:619)

"Low Memory Detector" daemon prio=6 tid=0x02a6ec00 nid=0x13e0  
runnable [0x00000000..0x00000000]

  java.lang.Thread.State: RUNNABLE

"CompilerThread0" daemon prio=10 tid=0x02a6b800 nid=0x17dc waiting  
on condition [0x00000000..0x02d1f840]

  java.lang.Thread.State: RUNNABLE

"Attach Listener" daemon prio=10 tid=0x02a6a000 nid=0xdbc runnable  
[0x00000000..0x00000000]

  java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" daemon prio=10 tid=0x02a68c00 nid=0xaf0 waiting  
on condition [0x00000000..0x00000000]

  java.lang.Thread.State: RUNNABLE

"Finalizer" daemon prio=8 tid=0x02a63c00 nid=0x127c in  
Object.wait() [0x02c2f000..0x02c2fc94]

  java.lang.Thread.State: WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)

       - waiting on <0x22e96ee8> (a java.lang.ref.ReferenceQueue 
$Lock)
       at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java: 
116)

       - locked <0x22e96ee8> (a java.lang.ref.ReferenceQueue$Lock)

       at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java: 
132)
       at java.lang.ref.Finalizer 
$FinalizerThread.run(Finalizer.java:159)
"Reference Handler" daemon prio=10 tid=0x02a5f400 nid=0x12a0 in  
Object.wait() [0x02bdf000..0x02bdfd14]

  java.lang.Thread.State: WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)
       - waiting on <0x22e96f70> (a java.lang.ref.Reference$Lock)
       at java.lang.Object.wait(Object.java:485)

       at java.lang.ref.Reference 
$ReferenceHandler.run(Reference.java:116)

       - locked <0x22e96f70> (a java.lang.ref.Reference$Lock)

"main" prio=6 tid=0x002a6c00 nid=0x12a4 in Object.wait()  
[0x0090f000..0x0090fe54]

  java.lang.Thread.State: WAITING (on object monitor)
       at java.lang.Object.wait(Native Method)

       - waiting on <0x22f16ed0> (a  
org.apache.felix.framework.util.ThreadGate)
       at  
org.apache.felix.framework.util.ThreadGate.await(ThreadGate.java:48)
       - locked <0x22f16ed0> (a  
org.apache.felix.framework.util.ThreadGate)
       at org.apache.felix.framework.Felix.waitForStop(Felix.java: 
997)
       at  
com 
.axway.visualization.server.bootstrap.Bootstrap.main(Bootstrap.java: 
112)

"VM Thread" prio=10 tid=0x02a5d800 nid=0x1038 runnable

"VM Periodic Task Thread" prio=10 tid=0x02f32800 nid=0x1190 waiting  
on condition

JNI global references: 1144
Heap

def new generation   total 960K, used 476K [0x22970000, 0x22a70000,  
0x22e50000)

 eden space 896K,  48% used [0x22970000, 0x229dd688, 0x22a50000)
 from space 64K,  99% used [0x22a60000, 0x22a6fff8, 0x22a70000)
 to   space 64K,   0% used [0x22a50000, 0x22a50000, 0x22a60000)

tenured generation   total 6424K, used 5802K [0x22e50000,  
0x23496000, 0x26970000)
  the space 6424K,  90% used [0x22e50000, 0x233fa800, 0x233fa800,  
0x23496000)
compacting perm gen  total 12288K, used 9883K [0x26970000,  
0x27570000, 0x2a970000)
  the space 12288K,  80% used [0x26970000, 0x27316fb0, 0x27317000,  
0x27570000)
   ro space 8192K,  67% used [0x2a970000, 0x2aed2d98, 0x2aed2e00,  
0x2b170000)
   rw space 12288K,  53% used [0x2b170000, 0x2b7e0640, 0x2b7e0800,  
0x2bd70000)
What I understand is that the thread "FelixStartLevel" is blocked  
by the thread "Thread-1" from iPojo.
In my case iPojo is in the process of validating a service while a  
shutdown felix command is started.

I suspect this is maybe related to this bug : 
https://issues.apache.org/jira/browse/FELIX-911
Tell me if you need more information other than the thread dump.
Thanks.
Regards
David


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