JMS CommunicationException Problem when programing run a long time

Hello,every one.
     I have a problem with OPenJms when my programing run a long time.
     I start my program,and it work fine begin.it can send messages and
receive messages normally for several hours, and it have send and receive
673902 amount messages.but for a longer time,when it send 
673903 message ,my programing catch an communication exception,the exception
message bellow:

javax.naming.CommunicationException:
org.exolab.jms.net.proxy.RemoteInvocationException
	at
org.codehaus.spice.jndikit.RemoteContext.handleException(RemoteContext.java:389)
	at org.codehaus.spice.jndikit.RemoteContext.lookup(RemoteContext.java:272)
	at
org.codehaus.spice.jndikit.AbstractContext.lookup(AbstractContext.java:263)
	at org.exolab.jms.jndi.ORBRemoteContext.lookup(ORBRemoteContext.java:110)
	at javax.naming.InitialContext.lookup(InitialContext.java:351)
	at com.nms.util.jms.TopicPublish.publishMessage(TopicPublish.java:57)
	at com.nms.util.jms.JmsUtil.sendMessageToTopic(JmsUtil.java:101)
	at com.nms.util.jms.TestPublish.SendMessageToTopic(TestPublish.java:28)
	at com.nms.util.jms.TestPublish.main(TestPublish.java:45)

every one ,if you know what problem with it,please tell me,thank you very
much!
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