[jboss-user] [Installation, Configuration & Deployment] - IllegalStateException: ClassLoadingTask.loadedTask is null

[youngkin]

I'm having intermittent problems during initialization of an application deployed as a .sar.  I'm getting the error mentioned in the subject line.  When the error occurs it usually moves around - i.e,. the stack trace location and offending class changes from occurrence to occurrence.  

The context:
1. JBoss 4.0.3 SP1
  | 2. There are several other applications deployed in the same JBoss instance - other .sars as well as an .ear that includes a .war.
  | 3. JMX is used by the .sar to start other internal services.
  | 
  | 
  | Attached below is a partial stack trace.  Thanks in advance.
  | 
  | Rich
  | 
  | java.lang.IllegalStateException: ClassLoadingTask.loadedTask is null, name: javax.xml.rpc.handler.HandlerRegistry
  |   |         at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:516)
  |   |         at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:377)
  |   |         at java.lang.ClassLoader.loadClass(Unknown Source)
  |   |         at java.lang.ClassLoader.loadClassInternal(Unknown Source)
  |   |         at example.MyClass.foo(MyClass.java:72)
  |   |         at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:150)
  |   |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
  |   |         at org.jboss.system.server.jmx.LazyMBeanServer.invoke(LazyMBeanServer.java:225)
  |   |         at com.avaya.ccr.jmx.JmxUtil.invoke(JmxUtil.java:69)
  |   |         at example.MyService.start(MyService.java:48)
  |   |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |   |         at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
  |   |         at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  |   |         at java.lang.reflect.Method.invoke(Unknown Source)
  |   |         at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
  |   |         at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
  |   |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
  |   |         at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
  |   |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
  |   |         at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
  |   |         at java.util.concurrent.FutureTask.run(Unknown Source)
  |   |         at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
  |   |         at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
  |   |         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
  |   |         at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
  |   |         at java.lang.Thread.run(Unknown Source)
  |   | 

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