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Hibernate version: 3.0.5
Mapping documents:
Code between sessionFactory.openSession() and session.close():
Using Springs' Open Session In View (OSIV) filter
In pageValidate() // pageValidate is called early in page construction
a call to a service method reattachEntity calls:
getHibernateTemplate().lock(getUserFromSession(),LockMode.NONE);
Full stack trace of any exception that occurs:
org.springframework.orm.hibernate3.HibernateSystemException
Illegal attempt to associate a collection with two open sessions; nested exception is org.hibernate.HibernateException: Illegal attempt to associate a collection with two open sessions
org.hibernate.HibernateException
Illegal attempt to associate a collection with two open sessions
org.hibernate.collection.AbstractPersistentCollection.setCurrentSession(AbstractPersistentCollection.java:237)
org.hibernate.event.def.OnLockVisitor.processCollection(OnLockVisitor.java:40)
org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:104)
org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:64)
org.hibernate.event.def.AbstractVisitor.processEntityPropertyValues(AbstractVisitor.java:58)
org.hibernate.event.def.AbstractVisitor.process(AbstractVisitor.java:129)
org.hibernate.event.def.AbstractReassociateEventListener.reassociate(AbstractReassociateEventListener.java:75)
org.hibernate.event.def.DefaultLockEventListener.onLock(DefaultLockEventListener.java:57)
org.hibernate.impl.SessionImpl.lock(SessionImpl.java:508)
org.springframework.orm.hibernate3.HibernateTemplate$10.doInHibernate(HibernateTemplate.java:519)
org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:311)
org.springframework.orm.hibernate3.HibernateTemplate.lock(HibernateTemplate.java:517)
com.azudio.aptp.base.service.impl.APTPServiceImpl.reattachEntity(APTPServiceImpl.java:804)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:324)
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:287)
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:155)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:122)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:57)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:174)
$Proxy63.reattachEntity(Unknown Source)
com.azudio.aptp.base.web.ProtectedBasePage.pageValidate(ProtectedBasePage.java:54)
com.azudio.aptp.base.web.student.StudentBasePage.pageValidate(StudentBasePage.java:28)
org.apache.tapestry.AbstractPage.firePageValidate(AbstractPage.java:558)
org.apache.tapestry.AbstractPage.validate(AbstractPage.java:333)
org.apache.tapestry.engine.RequestCycle.activate(RequestCycle.java:685)
org.apache.tapestry.engine.PageService.service(PageService.java:75)
org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:889)
org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:198)
org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:159)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
com.azudio.aptp.base.web.MessageFilter.doFilter(MessageFilter.java:36)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:172)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
java.lang.Thread.run(Thread.java:552)
Also ...
org.apache.catalina.connector.ClientAbortException
java.net.SocketException: Broken pipe
java.net.SocketOutputStream.socketWrite0(Native Method)
java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
java.net.SocketOutputStream.write(SocketOutputStream.java:136)
org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:747)
org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:403)
org.apache.coyote.http11.InternalOutputBuffer.flush(InternalOutputBuffer.java:305)
org.apache.coyote.http11.Http11Processor.action(Http11Processor.java:978)
org.apache.coyote.Response.action(Response.java:182)
org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:322)
org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:293)
org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:85)
org.apache.tapestry.request.ResponseOutputStream.forceFlush(ResponseOutputStream.java:149)
org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:945)
org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:198)
org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:159)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
com.azudio.aptp.base.web.MessageFilter.doFilter(MessageFilter.java:36)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:172)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
java.lang.Thread.run(Thread.java:552)
Name and version of the database you are using:MySQL 4.1.10
Application Framework: Tapestry 3.03, Tomcat 5.5.9, Spring 1.2
I'm having difficulty working out how I should solve this problem:
Repeatedly clicking on a link to the StudentHome page causes the above exception. I'm storing a detached student object in my session, as my StudentHome page begins I get the student and reattach it to a hib session opened by Springs' OSIV filter, I think I understand why this is happening, two requests are coming in at the same time and the first hib session is still open when the second is processing - is that right?
Another thing I've just noticed is that a single click works fine, doubles
sometimes get both the broken pipe error & the 'Illegal attempt to associate a collection with two open sessions' error
So how would one get around this? Appreciate any help.
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