java - The following objects may have been concurrently modified in another transaction -
i have jsf page has button when click button calls method update object exist in database. when click button twice exception. searched didn't find related answer. using jpa 2.0 full exception message
[4/10/14 10:36:54:532 edt] 00000138 registeredsyn e wtrn0074e: exception caught before_completion synchronization operation: <openjpa-1.2.4-snapshot-r422266:1481680 nonfatal store error> org.apache.openjpa.persistence.optimisticlockexception: optimistic locking errors detected when flushing data store. following objects may have been concurrently modified in transaction: [com.ibm.pp.epad.cmt.domain.brief-1] @ org.apache.openjpa.kernel.brokerimpl.newflushexception(brokerimpl.java:2184) @ org.apache.openjpa.kernel.brokerimpl.flush(brokerimpl.java:2031) @ org.apache.openjpa.kernel.brokerimpl.flushsafe(brokerimpl.java:1927) @ org.apache.openjpa.kernel.brokerimpl.beforecompletion(brokerimpl.java:1845) @ com.ibm.ws.uow.componentcontextsynchronizationwrapper.beforecompletion(componentcontextsynchronizationwrapper.java:65) @ com.ibm.tx.jta.registeredsyncs.coredistributebefore(registeredsyncs.java:289) @ com.ibm.ws.tx.jta.registeredsyncs.distributebefore(registeredsyncs.java:150) @ com.ibm.ws.tx.jta.transactionimpl.preprepare(transactionimpl.java:2353) @ com.ibm.ws.tx.jta.transactionimpl.stage1commitprocessing(transactionimpl.java:559) @ com.ibm.tx.jta.transactionimpl.processcommit(transactionimpl.java:986) @ com.ibm.tx.jta.transactionimpl.commit(transactionimpl.java:920) @ com.ibm.ws.tx.jta.tranmanagerimpl.commit(tranmanagerimpl.java:436) @ com.ibm.tx.jta.tranmanagerset.commit(tranmanagerset.java:161) @ com.ibm.ejs.csi.transtrategy.commit(transtrategy.java:952) @ com.ibm.ejs.csi.transtrategy.postinvoke(transtrategy.java:259) @ com.ibm.ejs.csi.transactioncontrolimpl.postinvoke(transactioncontrolimpl.java:570) @ com.ibm.ejs.container.ejscontainer.postinvoke(ejscontainer.java:4558) @ com.ibm.pp.epad.ejb.sessionbeans.ejslocal0slbriefservice_92ef595f.updatebrief(ejslocal0slbriefservice_92ef595f.java) @ com.ibm.pp.epad.controller.editbriefcontroller.savebrief(editbriefcontroller.java:369) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:48) @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:25) @ java.lang.reflect.method.invoke(method.java:600) @ org.apache.el.parser.astvalue.invoke(astvalue.java:159) @ org.apache.el.methodexpressionimpl.invoke(methodexpressionimpl.java:276) @ org.apache.myfaces.view.facelets.el.tagmethodexpression.invoke(tagmethodexpression.java:83) @ javax.faces.component._methodexpressiontomethodbinding.invoke(_methodexpressiontomethodbinding.java:88) @ org.apache.myfaces.application.actionlistenerimpl.processaction(actionlistenerimpl.java:100) @ javax.faces.component.uicommand.broadcast(uicommand.java:120) @ javax.faces.component.uiviewroot._broadcastall(uiviewroot.java:937) @ javax.faces.component.uiviewroot.broadcastevents(uiviewroot.java:271) @ javax.faces.component.uiviewroot._process(uiviewroot.java:1249) @ javax.faces.component.uiviewroot.processapplication(uiviewroot.java:675) @ org.apache.myfaces.lifecycle.invokeapplicationexecutor.execute(invokeapplicationexecutor.java:34) @ org.apache.myfaces.lifecycle.lifecycleimpl.executephase(lifecycleimpl.java:171) @ org.apache.myfaces.lifecycle.lifecycleimpl.execute(lifecycleimpl.java:118) @ javax.faces.webapp.facesservlet.service(facesservlet.java:189) @ com.ibm.ws.webcontainer.servlet.servletwrapper.service(servletwrapper.java:1661) @ com.ibm.ws.webcontainer.servlet.servletwrapper.service(servletwrapper.java:1602) @ com.ibm.ws.webcontainer.filter.webappfilterchain.dofilter(webappfilterchain.java:149) @ org.apache.myfaces.webapp.filter.extensionsfilter.dofilter(extensionsfilter.java:357) @ com.ibm.ws.webcontainer.filter.filterinstancewrapper.dofilter(filterinstancewrapper.java:190) @ com.ibm.ws.webcontainer.filter.webappfilterchain.dofilter(webappfilterchain.java:125) @ com.ibm.ws.webcontainer.filter.webappfilterchain._dofilter(webappfilterchain.java:80) @ com.ibm.ws.webcontainer.filter.webappfiltermanager.dofilter(webappfiltermanager.java:908) @ com.ibm.ws.webcontainer.servlet.servletwrapper.handlerequest(servletwrapper.java:939) @ com.ibm.ws.webcontainer.servlet.servletwrapper.handlerequest(servletwrapper.java:507) @ com.ibm.ws.webcontainer.servlet.servletwrapperimpl.handlerequest(servletwrapperimpl.java:181) @ com.ibm.ws.webcontainer.servlet.cacheservletwrapper.handlerequest(cacheservletwrapper.java:91) @ com.ibm.ws.webcontainer.webcontainer.handlerequest(webcontainer.java:878) @ com.ibm.ws.webcontainer.wswebcontainer.handlerequest(wswebcontainer.java:1592) @ com.ibm.ws.webcontainer.channel.wcchannellink.ready(wcchannellink.java:191) @ com.ibm.ws.http.channel.inbound.impl.httpinboundlink.handlediscrimination(httpinboundlink.java:453) @ com.ibm.ws.http.channel.inbound.impl.httpinboundlink.handlenewrequest(httpinboundlink.java:515) @ com.ibm.ws.http.channel.inbound.impl.httpinboundlink.processrequest(httpinboundlink.java:306) @ com.ibm.ws.http.channel.inbound.impl.httpiclreadcallback.complete(httpiclreadcallback.java:84) @ com.ibm.ws.tcp.channel.impl.aioreadcompletionlistener.futurecompleted(aioreadcompletionlistener.java:175) @ com.ibm.io.async.abstractasyncfuture.invokecallback(abstractasyncfuture.java:217) @ com.ibm.io.async.asyncchannelfuture.firecompletionactions(asyncchannelfuture.java:161) @ com.ibm.io.async.asyncfuture.completed(asyncfuture.java:138) @ com.ibm.io.async.resulthandler.complete(resulthandler.java:204) @ com.ibm.io.async.resulthandler.runeventprocessingloop(resulthandler.java:775) @ com.ibm.io.async.resulthandler$2.run(resulthandler.java:905) @ com.ibm.ws.util.threadpool$worker.run(threadpool.java:1656) can me please. in advance.
if understood correctly, happens when click button twice?
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