I am a bit surprised to see org.jboss.slf4j showing up in the stack trace. 
It should rather the load org.slf4j package instead.

It seems the use of JBoss slf4j at runtime is causing problems.



Torsten Mielke
torsten@fusesource.com
tmielke@blogspot.com




On Nov 2, 2011, at 6:30 AM, shwetesha wrote:

> I am using embedded broker. I get the exceptions when I start JBoss server.
> 
> 04:36:36,636 INFO  [TransportConnector] Connector vm://localhost Started
> 04:36:36,777 ERROR [STDERR] Exception in thread "BrokerService[localhost]
> Task-1" 
> 04:36:36,824 ERROR [STDERR] java.lang.NullPointerException
> 04:36:36,824 ERROR [STDERR] 	at java.util.Hashtable.put(Hashtable.java:394)
> 04:36:36,824 ERROR [STDERR] 	at org.apache.log4j.MDC.put0(MDC.java:117)
> 04:36:36,824 ERROR [STDERR] 	at org.apache.log4j.MDC.put(MDC.java:72)
> 04:36:36,824 ERROR [STDERR] 	at
> org.jboss.logging.log4j.Log4jMDCProvider.put(Log4jMDCProvider.java:49)
> 04:36:36,824 ERROR [STDERR] 	at org.jboss.logging.MDC.put(MDC.java:58)
> 04:36:36,824 ERROR [STDERR] 	at
> org.jboss.slf4j.JBossMDCAdapter.put(JBossMDCAdapter.java:53)
> 04:36:36,824 ERROR [STDERR] 	at
> org.jboss.slf4j.JBossMDCAdapter.setContextMap(JBossMDCAdapter.java:73)
> 04:36:36,824 ERROR [STDERR] 	at org.slf4j.MDC.setContextMap(MDC.java:192)
> 04:36:36,824 ERROR [STDERR] 	at
> org.apache.activemq.util.MDCHelper.setContextMap(MDCHelper.java:41)
> 04:36:36,824 ERROR [STDERR] 	at
> org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:45)
> 04:36:36,824 ERROR [STDERR] 	at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 04:36:36,824 ERROR [STDERR] 	at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 04:36:36,824 ERROR [STDERR] 	at java.lang.Thread.run(Thread.java:619)
> 
> Can you help me to resolve it ???
> 
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