系统对接调用EJB失败，是为什么啊，请高手指点

[DEBUG]   2011/06/09 03:56:38,607
[com.huawei.oss.mdsback.bssinter.WriteBackBossEngineNew] Exception occured when call CC interface(new optimized), exception info: java.rmi.MarshalException: CORBA COMM_FAILURE 0x4942f306 Maybe; nested exception is: 
org.omg.CORBA.COMM_FAILURE: purge_calls:1452 reason=1 state=5  vmcid: IBM  minor code: 306 completed: Maybe

[DEBUG]   2011/06/09 03:56:38,608
[com.huawei.oss.mdsback.bssinter.TaskWriteBackBossOptNew] Failed to write back BOSS, batchId: 130391946

补充：企业软件 ,  WebSphere