WebSphere 5.x错误，高手请进！

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04-2-16 12:01:51:453 CST] 2d850cb DataAccessReq E PMGR6025E: 在乐观并发控制下尝试的更新失败，因为自从此事务读取数据存储中的 bean 数据后，该数据已经发生变化。或者是谓词字段更改了值，或者是 bean 本身已被除去。
[04-2-16 12:01:51:484 CST] 2d850cb DataAccessReq E PMGR0000E: 调用堆栈：
com.ibm.ws.ejbpersistence.utilpm.OptimisticUpdateFailedException: PMGR6025E: An attempted update under optimistic concurrency control failed because another application has changed the bean data in the datastore since this transaction read it. Either it changed a predicate field value or removed the bean itself.
at com.ibm.ws.ejbpersistence.dataaccess.DataAccessRequestImpl.execute(Unknown Source)
at com.ibm.ws.ejbpersistence.beanextensions.ConcreteBeanStatefulInstanceExtensionImpl.executeStore(Unknown Source)
at com.ibm.ws.ejbpersistence.beanextensions.CBOldDirtyState.ejbStore(Unknown Source)
at com.ibm.ws.ejbpersistence.beanextensions.ConcreteBeanStatefulInstanceExtensionImpl.ejbStore(Unknown Source)
at com.fenet.vss.ejb.ConcreteLog_ae1080e9.ejbStore(ConcreteLog_ae1080e9.java:56)
at com.ibm.ejs.container.ContainerManaged2_0BeanO.store(ContainerManaged2_0BeanO.java:232)
at com.ibm.ejs.container.EntityBeanO.beforeCompletion(EntityBeanO.java:1051)
at com.ibm.ejs.container.ContainerTx.beforeCompletion(ContainerTx.java:550)
at com.ibm.ejs.util.tran.SyncDriver.beforeCompletion(SyncDriver.java:226)
at com.ibm.ejs.jts.jta.TransactionImpl$SyncronizationWrapper.before_completion(TransactionImpl.java:1270)
at com.ibm.ejs.jts.jts.CoordinatorImpl$Sync.beforePrepare(CoordinatorImpl.java:1188)
at com.ibm.ejs.jts.tran.EventCallback.executeCallback(EventCallback.java:166)
at com.ibm.ejs.jts.tran.EventCallback.executeCallbackTree(EventCallback.java:132)
at com.ibm.ejs.jts.tran.EventPrepare.ExecuteBeforePrepareCallbacks(EventPrepare.java:307)
at com.ibm.ejs.jts.tran.EventPrepare.event_LocalPrepareWork(EventPrepare.java:287)
at com.ibm.ejs.jts.tran.EventPrepare.event_BecomeCoordinator(EventPrepare.java:970)
at com.ibm.ejs.jts.tran.EventControl.event_EndTopLevel(EventControl.java:295)
at com.ibm.ejs.jts.tran.TrecInterface.end(TrecInterface.java:89)
at com.ibm.ejs.jts.jts.TerminatorImpl.commit(TerminatorImpl.java:104)
at com.ibm.ejs.jts.jts.CurrentImpl.commit(CurrentImpl.java:249)
at com.ibm.ejs.jts.jts.CurrentSet.commit(CurrentSet.java:316)
at com.ibm.ejs.csi.TranStrategy.commit(TranStrategy.java:623)
at com.ibm.ejs.csi.TranStrategy.postInvoke(TranStrategy.java:148)
at com.ibm.ejs.csi.TransactionControlImpl.postInvoke(TransactionControlImpl.java:535)
at com.ibm.ejs.container.EJSContainer.postInvoke(EJSContainer.java:2911)
at com.ibm.ejs.container.EJSContainer.postInvoke(EJSContainer.java:2785)
at com.fenet.vss.ejb.EJSRemoteStatelessLogFacade_dc32536c.log(EJSRemoteStatelessLogFacade_dc32536c.java:61)
at com.fenet.vss.ejb._LogFacade_Stub.log(_LogFacade_Stub.java:261)
at com.fenet.vss.util.VSSLogger.log(VSSLogger.java:56)
at org.apache.jsp._login._jspService(_login.java:171)
at com.ibm.ws.webcontainer.jsp.runtime.HttpJspBase.service(HttpJspBase.java:89)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:357)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.serviceJspFile(JspServlet.java:675)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.service(JspServlet.java:773)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:313)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:283)
at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:948)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:530)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:176)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:79)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:201)
at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
at com.ibm.ws.webcontainer.cache.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:114)
at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:186)
at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:334)
at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:610)
at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:431)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:593)