I have created an MDB that receives messages from a queue.  I have sent messages to the queue successfully, but am receiving the following error.  Any insight would be greatly appeciated!!

2:02:53,359 ERROR [JmsServerSession] Unexpected error delivering message delegator->JBossMessage[20396533566456004]:PERSISTENT, deliveryId=10
javax.ejb.EJBException: Failed to acquire the pool semaphore, strictTimeout=10000
     at org.jboss.ejb3.pool.StrictMaxPool.get(StrictMaxPool.java:127)
     at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:58)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
     at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
     at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:194)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
     at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
     at org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:80)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
     at org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
     at org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
     at org.jboss.ejb3.mdb.MessagingContainer.localInvoke(MessagingContainer.java:282)
     at org.jboss.ejb3.mdb.inflow.MessageInflowLocalProxy.delivery(MessageInflowLocalProxy.java:270)
     at org.jboss.ejb3.mdb.inflow.MessageInflowLocalProxy.invoke(MessageInflowLocalProxy.java:140)
     at $Proxy348.onMessage(Unknown Source)
     at org.jboss.resource.adapter.jms.inflow.JmsServerSession.onMessage(JmsServerSession.java:178)
     at org.jboss.jms.client.container.ClientConsumer.callOnMessageStatic(ClientConsumer.java:160)
     at org.jboss.jms.client.container.SessionAspect.handleRun(SessionAspect.java:831)
     at org.jboss.aop.advice.org.jboss.jms.client.container.SessionAspect_z_handleRun_31088724.invoke(SessionAspect_z_handleRun_31088724.java)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
     at org.jboss.jms.client.container.ClosedInterceptor.invoke(ClosedInterceptor.java:170)
     at org.jboss.aop.advice.PerInstanceInterceptor.invoke(PerInstanceInterceptor.java:86)
     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
     at org.jboss.jms.client.delegate.ClientSessionDelegate.run(ClientSessionDelegate.java)
     at org.jboss.jms.client.JBossSession.run(JBossSession.java:199)
     at org.jboss.resource.adapter.jms.inflow.JmsServerSession.run(JmsServerSession.java:234)
     at org.jboss.resource.work.WorkWrapper.execute(WorkWrapper.java:205)
     at org.jboss.util.threadpool.BasicTaskWrapper.run(BasicTaskWrapper.java:260)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)