EclipseLink, Toplink NotSerializableException

[jmekman]

I have a basic crud application (SWF2, Spring-security, JPA) that works correctly by using Hibernate Entity Manager as JPA implementation.
when i try to use toplink or eclipselink as JPA providers i get
exceptions about not serializable objects in flow scope:
org.springframework.webflow.execution.repository.s napshot.SnapshotCreationException: Could not serialize flow execution; make sure all objects stored in flow or flash scope are serializable

java.io.NotSerializableException: org.eclipse.persistence.internal.jpa.EntityManager Impl

Does anyone jave a workaround for this? I tried with static and load time weaving but the result remains the same.

[andre80]

any updates on this matter ? i face the same issue too

[Keith Donald]

Hi,

Looks like their Entity Manager implementation is not serializable. I would bring this up with the EclipseLink team--perhaps they have this capability factored into their feature roadmap.

Keith

[andre80]

tq, I really appreciate it

I m a bit frustated yesterday, I was trying to save a web of object in one go, using Hibernate I get not serializable exception on MarkerObject, then I tried eclipse link and get the same exception on EntityManagerImpl, and after that I get problem on integrating OpenJPA, get NullPointerException on serializing and deserializing. Finally I decided to recompile Hibernate ^^, I hope the JPA Providers would help us.

[Fonto]

Hi,

I have changed the sample application swf-booking-faces (2.0.7-RELEASE) to work with EclipseLink 1.1.0. I have deployed it on Glassfish V3 ApplicationServer. When pushing the button "Book Hotel" I get the same error.

Does anybody know a sollution or workaround?



[#|2009-04-23T15:27:28.009+0200|INFO|sun-glassfish|null|_ThreadID=15;_ThreadName=Thread-3;|DEBUG: org.springframework.webflow.engine.ViewState - Entering state 'enterBookingDetails' of flow 'booking'
|#]

[#|2009-04-23T15:27:28.009+0200|INFO|sun-glassfish|null|_ThreadID=15;_ThreadName=Thread-3;|DEBUG: org.springframework.webflow.engine.impl.FlowExecut ionImpl - Assigned key e1s4
|#]

[#|2009-04-23T15:27:28.009+0200|INFO|sun-glassfish|null|_ThreadID=15;_ThreadName=Thread-3;|DEBUG: org.springframework.webflow.engine.Transition - Completed transition execution. As a result, the new state is 'enterBookingDetails' in flow 'booking'
|#]

[#|2009-04-23T15:27:28.009+0200|INFO|sun-glassfish|null|_ThreadID=15;_ThreadName=Thread-3;|DEBUG: org.springframework.webflow.execution.repository.i mpl.DefaultFlowExecutionRepository - Putting flow execution '[FlowExecutionImpl@fcc426 flow = 'main', flowSessions = list[[FlowSessionImpl@1f9603b flow = 'main', state = 'bookHotel', scope = map['searchCriteria' -> [Search Criteria searchString = '', 'hotel' -> Hotel(Chilworth Manor,The Cottage, Southampton Business Park,Southampton,SO16 7JF)]], [FlowSessionImpl@1bb71ac flow = 'booking', state = 'enterBookingDetails', scope = map['persistenceContext' -> org.eclipse.persistence.internal.jpa.EntityManager Impl@124044e, 'booking' -> Booking(User(erwin),Hotel(Chilworth Manor,The Cottage, Southampton Business Park,Southampton,SO16 7JF)), 'hotelId' -> 3, 'viewScope' -> map[[empty]]]]]]' into repository
|#]

[#|2009-04-23T15:27:28.024+0200|INFO|sun-glassfish|null|_ThreadID=15;_ThreadName=Thread-3;|DEBUG: org.springframework.webflow.conversation.impl.Sess ionBindingConversationManager - Unlocking conversation 1
|#]

[#|2009-04-23T15:27:28.024+0200|INFO|sun-glassfish|null|_ThreadID=15;_ThreadName=Thread-3;|DEBUG: org.springframework.web.servlet.DispatcherServlet - Could not complete request
org.springframework.webflow.execution.repository.s napshot.SnapshotCreationException: Could not serialize flow execution; make sure all objects stored in flow or flash scope are serializable
at org.springframework.webflow.execution.repository.s napshot.SerializedFlowExecutionSnapshot.<init>(SerializedFlowExecutionSnapshot.java:74)
at org.springframework.webflow.execution.repository.s napshot.SerializedFlowExecutionSnapshotFactory.cre ateSnapshot(SerializedFlowExecutionSnapshotFactory .java:70)
at org.springframework.webflow.execution.repository.s napshot.AbstractSnapshottingFlowExecutionRepositor y.snapshot(AbstractSnapshottingFlowExecutionReposi tory.java:75)
at org.springframework.webflow.execution.repository.i mpl.DefaultFlowExecutionRepository.putFlowExecutio n(DefaultFlowExecutionRepository.java:123)
at org.springframework.webflow.executor.FlowExecutorI mpl.resumeExecution(FlowExecutorImpl.java:165)
at org.springframework.webflow.mvc.servlet.FlowHandle rAdapter.handle(FlowHandlerAdapter.java:183)
at org.springframework.web.servlet.DispatcherServlet. doDispatch(DispatcherServlet.java:875)
at org.springframework.web.servlet.DispatcherServlet. doService(DispatcherServlet.java:807)
at org.springframework.web.servlet.FrameworkServlet.p rocessRequest(FrameworkServlet.java:571)
at org.springframework.web.servlet.FrameworkServlet.d oPost(FrameworkServlet.java:511)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:754)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:847)
at org.apache.catalina.core.ApplicationFilterChain.se rvletService(ApplicationFilterChain.java:431)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:337)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:218)
at org.springframework.security.util.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java :378)
at org.springframework.security.intercept.web.FilterS ecurityInterceptor.invoke(FilterSecurityIntercepto r.java:109)
at org.springframework.security.intercept.web.FilterS ecurityInterceptor.doFilter(FilterSecurityIntercep tor.java:83)
at org.springframework.security.util.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java :390)
at org.springframework.security.ui.SessionFixationPro tectionFilter.doFilterHttp(SessionFixationProtecti onFilter.java:67)
at org.springframework.security.ui.SpringSecurityFilt er.doFilter(SpringSecurityFilter.java:53)
at org.springframework.security.util.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java :390)
at org.springframework.security.ui.ExceptionTranslati onFilter.doFilterHttp(ExceptionTranslationFilter.j ava:101)
at org.springframework.security.ui.SpringSecurityFilt er.doFilter(SpringSecurityFilter.java:53)
at org.springframework.security.util.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java :390)
at org.springframework.security.providers.anonymous.A nonymousProcessingFilter.doFilterHttp(AnonymousPro cessingFilter.java:105)
at org.springframework.security.ui.SpringSecurityFilt er.doFilter(SpringSecurityFilter.java:53)
at org.springframework.security.util.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java :390)
at org.springframework.security.ui.rememberme.Remembe rMeProcessingFilter.doFilterHttp(RememberMeProcess ingFilter.java:116)
at org.springframework.security.ui.SpringSecurityFilt er.doFilter(SpringSecurityFilter.java:53)
at org.springframework.security.util.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java :390)
at org.springframework.security.wrapper.SecurityConte xtHolderAwareRequestFilter.doFilterHttp(SecurityCo ntextHolderAwareRequestFilter.java:91)
at org.springframework.security.ui.SpringSecurityFilt er.doFilter(SpringSecurityFilter.java:53)
at org.springframework.security.util.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java :390)
at org.springframework.security.ui.basicauth.BasicPro cessingFilter.doFilterHttp(BasicProcessingFilter.j ava:174)
at org.springframework.security.ui.SpringSecurityFilt er.doFilter(SpringSecurityFilter.java:53)
at org.springframework.security.util.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java :390)
at org.springframework.security.ui.AbstractProcessing Filter.doFilterHttp(AbstractProcessingFilter.java: 277)
at org.springframework.security.ui.SpringSecurityFilt er.doFilter(SpringSecurityFilter.java:53)
at org.springframework.security.util.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java :390)
at org.springframework.security.ui.logout.LogoutFilte r.doFilterHttp(LogoutFilter.java:89)
at org.springframework.security.ui.SpringSecurityFilt er.doFilter(SpringSecurityFilter.java:53)
at org.springframework.security.util.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java :390)
at org.springframework.security.context.HttpSessionCo ntextIntegrationFilter.doFilterHttp(HttpSessionCon textIntegrationFilter.java:235)
at org.springframework.security.ui.SpringSecurityFilt er.doFilter(SpringSecurityFilter.java:53)
at org.springframework.security.util.FilterChainProxy $VirtualFilterChain.doFilter(FilterChainProxy.java :390)
at org.springframework.security.util.FilterChainProxy .doFilter(FilterChainProxy.java:175)
at org.springframework.web.filter.DelegatingFilterPro xy.invokeDelegate(DelegatingFilterProxy.java:236)
at org.springframework.web.filter.DelegatingFilterPro xy.doFilter(DelegatingFilterProxy.java:167)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:250)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:218)
at org.springframework.web.filter.CharacterEncodingFi lter.doFilterInternal(CharacterEncodingFilter.java :96)
at org.springframework.web.filter.OncePerRequestFilte r.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:250)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:218)
at org.apache.catalina.core.StandardWrapperValve.preI nvoke(StandardWrapperValve.

[sashe]

I'm getting the same error as Fonto above :mad:

My config:
EclipseLink instead of Hibernate. I have tested the hibernate part and it works great

In case of EclipseLink not sure what to do:

EclipseLink
Spring WebFlow 2.0.8
Tomcat 6.0.20
MySQL 5.1

Caused by: java.io.NotSerializableException: org.eclipse.persistence.internal.jpa.EntityManager Impl
at java.io.ObjectOutputStream.writeObject0(ObjectOutp utStream.java:1156)
at java.io.ObjectOutputStream.defaultWriteFields(Obje ctOutputStream.java:1509)
at java.io.ObjectOutputStream.writeSerialData(ObjectO utputStream.java:1474)
at java.io.ObjectOutputStream.writeOrdinaryObject(Obj ectOutputStream.java:1392)
:mad:

[Nicolas]

Hi,

Looks like their Entity Manager implementation is not serializable. I would bring this up with the EclipseLink team--perhaps they have this capability factored into their feature roadmap.

Keith

Must the Entity Manager be Serializable?
This is not a requirement of JPA spec, so I guess we cannot rely on it.

Nicolas.

[moktc]

Hi All

Any progress on where this is going? Should Webflow expect EntityManager to be Serializable when the JPA spec does not specify that EntityManager need to be Serializable?

[cgs]

You should be able to disable serialization of the flow state with this:



<webflow:flow-executor id="flowExecutor">

<webflow:flow-execution-repository max-execution-snapshots="0" />

</webflow:flow-executor>


Of course, that brings with it other issues...

[vardlokkur]

Hi,

Looks like their Entity Manager implementation is not serializable. I would bring this up with the EclipseLink team--perhaps they have this capability factored into their feature roadmap.

Keith
Keith,

I've reported new issue into JIRA, related to this discussion - see: https://jira.springsource.org/browse/SWF-1463 - as I wrote there, the reason of this issue is wrong assumption that all implementations of EntityManager should be Serializable, while they don't have to - it has nothing to do with EclipseLink, and should be corrected in the Spring Webflow code.

[jaredp]

I'm having the same issue. On the JIRA ticket, Rossen Stoyanchev said that the workaround is to "merging your flow variables with EntityManager". Can anyone elaborate on what this means?