richardgood
commented
7 years ago Closed richardgood closed 6 years ago
richardgood
commented
7 years ago 
satanatoly
commented
6 years ago applied provided patch. closing
We've been experience a deadlock in classloading when using Wildfly. Full details of deadlock below.
It seems in org.mobicents.slee.container.component.deployment.classloading.URLClassLoaderDomainImpl There is a mix of synchronize, global locking and also locking within the default Java class loader that can cause this deadlock.
Suggested patch to solve this is attached.
Here is the deadlock: Found one Java-level deadlock:
"SLEE-EventRouterExecutor-49-thread-1": waiting to lock monitor 0x00007f7b0436ca48 (object 0x00000000e8155878, a org.mobicents.slee.container.component.deployment.classloading.URLClassLoaderDomainImpl), which is held by "SLEE-EventRouterExecutor-39-thread-1" "SLEE-EventRouterExecutor-39-thread-1": waiting for ownable synchronizer 0x0000000088a13a28, (a java.util.concurrent.locks.ReentrantLock$NonfairSync), which is held by "SLEE-EventRouterExecutor-98-thread-1" "SLEE-EventRouterExecutor-98-thread-1": waiting to lock monitor 0x00007f7b0436ca48 (object 0x00000000e8155878, a org.mobicents.slee.container.component.deployment.classloading.URLClassLoaderDomainImpl), which is held by "SLEE-EventRouterExecutor-39-thread-1"
Java stack information for the threads listed above:
"SLEE-EventRouterExecutor-49-thread-1": at sun.misc.Unsafe.defineClass(Native Method) at sun.reflect.ClassDefiner.defineClass(ClassDefiner.java:63) at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:399) at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:394) at java.security.AccessController.doPrivileged(Native Method) at sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:393) at sun.reflect.MethodAccessorGenerator.generateConstructor(MethodAccessorGenerator.java:92) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:55) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at java.lang.Class.newInstance(Class.java:442) at org.mobicents.slee.runtime.sbb.SbbObjectImpl.createConcreteClass(SbbObjectImpl.java:547) at org.mobicents.slee.runtime.sbb.SbbObjectImpl.(SbbObjectImpl.java:106)
at org.mobicents.slee.runtime.sbb.SbbObjectPoolFactory.makeObject(SbbObjectPoolFactory.java:146)
at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1188)
at org.mobicents.slee.runtime.sbb.SbbObjectPoolImpl.borrowObject(SbbObjectPoolImpl.java:68)
at org.mobicents.slee.runtime.sbbentity.SbbEntityImpl.assignSbbObject(SbbEntityImpl.java:748)
at org.mobicents.slee.runtime.eventrouter.routingtask.EventRoutingTaskImpl.routeQueuedEvent(EventRoutingTaskImpl.java:362)
at org.mobicents.slee.runtime.eventrouter.routingtask.EventRoutingTaskImpl.run(EventRoutingTaskImpl.java:128)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
"SLEE-EventRouterExecutor-39-thread-1":
at sun.misc.Unsafe.park(Native Method)
Found 1 deadlock.