关于JBOSS的异常中断问题

[lvzhengrui2006]

程序我采用的javabean+jsp+ejb，用jboss做服务器，但经常会出现下面的异常，致使JBOSS中断,请教各位大哥是什么因为？？

日志片断1
2006-03-17 10:25:52,156 WARN [org.jboss.tm.TransactionImpl] XAException: tx=TransactionImpl:XidImpl [FormatId=257, GlobalId=vehicle_bar//294475, BranchQual=] errorCode=XA_UNKNOWN(0)
org.jboss.resource.connectionmanager.JBossLocalXAException: Error trying to start local tx: ; - nested throwable: (org.jboss.resource.JBossResourceException: SQLException; - nested throwable: (java.sql.SQLException: 违反协议))
at org.jboss.resource.connectionmanager.TxConnectionManager$LocalXAResource.start(TxConnectionManager.java:708)
at org.jboss.tm.TransactionImpl.startResource(TransactionImpl.java:1148)
at org.jboss.tm.TransactionImpl.enlistResource(TransactionImpl.java:636)
at org.jboss.resource.connectionmanager.TxConnectionManager$TxConnectionEventListener.enlist(TxConnectionManager.java:455)
at org.jboss.resource.connectionmanager.TxConnectionManager.managedConnectionReconnected(TxConnectionManager.java:343)
at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:483)
at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:814)

日志片断2
Caused by: org.jboss.resource.JBossResourceException: SQLException; - nested throwable: (java.sql.SQLException: 违反协议)
at org.jboss.resource.adapter.jdbc.BaseWrapperManagedConnection.checkException(BaseWrapperManagedConnection.java:546)
at org.jboss.resource.adapter.jdbc.local.LocalManagedConnection.begin(LocalManagedConnection.java:156)
at org.jboss.resource.connectionmanager.TxConnectionManager$LocalXAResource.start(TxConnectionManager.java:704)
... 89 more
Caused by: java.sql.SQLException: 违反协议
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:1160)
at oracle.jdbc.ttc7.Ocommoncall.receive(Ocommoncall.java:149)
at oracle.jdbc.ttc7.TTC7Protocol.setAutoCommit(TTC7Protocol.java:559)
at oracle.jdbc.driver.OracleConnection.setAutoCommit(OracleConnection.java:1288)
at org.jboss.resource.adapter.jdbc.local.LocalManagedConnection.begin(LocalManagedConnection.java:149)
... 90 more
2006-03-17 10:25:52,156 ERROR [STDERR] at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:46)
2006-03-17 10:25:53,796 ERROR [org.jboss.web.localhost.Engine] ----- Root Cause -----
javax.servlet.ServletException
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:536)
at org.apache.jsp.contractReport_jsp._jspService(contractReport_jsp.java:129)