プールされているコネクションにエラーが発生した場合に NullPointerException が発生する．

Exception in thread "AcitveMQ Connection Worker: tcp://localhost/127.0.0.1:61616" java.lang.NullPointerException
at org.seasar.jca.outbound.policy.AbstractTransactionBoundedPoolingPolicy.connectionErrorOccurred(AbstractTransactionBoundedPoolingPolicy.java:83)
at org.seasar.jca.outbound.ConnectionManagerImpl$Listener.connectionErrorOccurred(ConnectionManagerImpl.java:175)
at org.apache.activemq.ra.ActiveMQManagedConnection.fireErrorOccurredEvent(ActiveMQManagedConnection.java:192)
at org.apache.activemq.ra.ActiveMQManagedConnection.onException(ActiveMQManagedConnection.java:416)
at org.apache.activemq.ActiveMQConnection$4.run(ActiveMQConnection.java:1524)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)