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From "David GAY (JIRA)" <j...@apache.org>
Subject [jira] Closed: (FELIX-951) Deadlock in iPojo when stopping Felix
Date Mon, 23 Feb 2009 08:13:01 GMT

     [ https://issues.apache.org/jira/browse/FELIX-951?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

David GAY closed FELIX-951.
---------------------------

       Resolution: Won't Fix
    Fix Version/s: felix-1.6.0

After checking, this problem is related to https://issues.apache.org/jira/browse/FELIX-911
and it's fixed in Felix 1.6.0

> 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
>             Fix For: felix-1.6.0
>
>
> 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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