Error in retrieving session attribute for ejb remote in clustered env

Question

          We store EJB remote object in session and differnt clients retrieve it from sessionbefore
          making a business method call. This seems to work in most cases but sometimes
          it gives the exception attached. This happens only in a clustered environment.What
          has been observed is that if we put the remote object inside a hashtablewhich
          in-turn is stored in session retrieval from hashtable does not give thisproblem.
          Any suggestion / solution would be greatly appreciated.
          Regards,
          Shilpa
          The exception Stack trace is attachedjava.rmi.NoSuchObjectException: Unable to
          locate EJBHome: 'BalconHome' on server:'t3://176.19.183.6,176.19.183.15:9616 at
          weblogic.ejb20.internal.HomeHandleImpl.getEJBHome(HomeHandleImpl.java:80) at weblogic.ejb20.internal.HandleImpl.getEJBObject(HandleImpl.java:184)
          at weblogic.servlet.internal.session.SessionData.getAttribute(SessionData.java:395)
          at com.chase.ccs.util.AccountInfoAccessor.setCurrentAccountAttributeBalcon(AccountInfoAccessor.java:362)
          at com.chase.ccs.util.ModelAccessor.initBlaconOfferModel(ModelAccessor.java:311)
          at com.chase.ccs.balancetransfer.OfferPortlet.service(OfferPortlet.java:88) at
          com.chase.ccs.balancetransfer.OfferView.pageStart(OfferView.java:65) at com.chase.ccs.util.ModuleStarter.doAllPageStart(ModuleStarter.java:236)
          at jsp_servlet._templates._template0005._UXaQVaXTUaSYaWaSRZfdXbWSfYXbTRQb.__ccs_mm_tgl_pfp_grid._jspService(__ccs_mm_tgl_pfp_grid.java:316)
          at weblogic.servlet.jsp.JspBase.service(JspBase.java:27) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
          at weblogic.servlet.internal.RequestDispatcherImpl.include(RequestDispatcherImpl.java:482)
          at weblogic.servlet.internal.RequestDispatcherImpl.include(RequestDispatcherImpl.java:308)
          at weblogic.servlet.jsp.PageContextImpl.include(PageContextImpl.java:116) at com.epicentric.servlets.ServletUtils.include(ServletUtils.java:150)
          at com.epicentric.template.Style.execute(Style.java:538) at com.epicentric.taglib.html.IncludeGridTag.doStartTag(IncludeGridTag.java:57)
          at jsp_servlet.__index._jspService(__index.java:560) at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
          at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:242)
          at com.epicentric.servlets.stackable.SiteDispatcherServlet.service(SiteDispatcherServlet.java:195)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
          at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2546)
          at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2260)
          at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
          

Answer 1

          The EJB is stateful session EJB. Have seen some posts pointing to problems
          with
          stateful session EJB and cluster and the suggested solution was SP4 (we are
          on 6.1 SP3).
          Hope this gets more clarity (and some solutions!!!).
          regards,
          Rajesh / Shilpa
          "Cameron Purdy" <[email protected]> wrote in message
          news:[email protected]...
          > It's probably caused by the fact that the session attributes get
          serialized
          > when they are in a cluster. (Something to do with ser/deser process?)
          >
          > Peace,
          >
          > Cameron Purdy
          > Tangosol, Inc.
          > http://www.tangosol.com/coherence.jsp
          > Tangosol Coherence: Clustered Replicated Cache for Weblogic
          >
          >
          > "Shilpa" <[email protected]> wrote in message
          > news:[email protected]...
          > >
          > > We store EJB remote object in session and differnt clients retrieve it
          > from sessionbefore
          > > making a business method call. This seems to work in most cases but
          > sometimes
          > > it gives the exception attached. This happens only in a clustered
          > environment.What
          > > has been observed is that if we put the remote object inside a
          > hashtablewhich
          > > in-turn is stored in session retrieval from hashtable does not give
          > thisproblem.
          > > Any suggestion / solution would be greatly appreciated.
          > >
          > > Regards,
          > > Shilpa
          > >
          > > The exception Stack trace is attachedjava.rmi.NoSuchObjectException:
          > Unable to
          > > locate EJBHome: 'BalconHome' on
          > server:'t3://176.19.183.6,176.19.183.15:9616 at
          > >
          weblogic.ejb20.internal.HomeHandleImpl.getEJBHome(HomeHandleImpl.java:80)
          > at weblogic.ejb20.internal.HandleImpl.getEJBObject(HandleImpl.java:184)
          > > at
          >
          weblogic.servlet.internal.session.SessionData.getAttribute(SessionData.java:
          > 395)
          > > at
          >
          com.chase.ccs.util.AccountInfoAccessor.setCurrentAccountAttributeBalcon(Acco
          > untInfoAccessor.java:362)
          > > at
          >
          com.chase.ccs.util.ModelAccessor.initBlaconOfferModel(ModelAccessor.java:311
          > )
          > > at
          > com.chase.ccs.balancetransfer.OfferPortlet.service(OfferPortlet.java:88)
          at
          > > com.chase.ccs.balancetransfer.OfferView.pageStart(OfferView.java:65) at
          > com.chase.ccs.util.ModuleStarter.doAllPageStart(ModuleStarter.java:236)
          > > at
          >
          jsp_servlet._templates._template0005._UXaQVaXTUaSYaWaSRZfdXbWSfYXbTRQb.__ccs
          > mmtgl_pfp_grid._jspService(__ccs_mm_tgl_pfp_grid.java:316)
          > > at weblogic.servlet.jsp.JspBase.service(JspBase.java:27) at
          >
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
          > :265)
          > > at
          >
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
          > :200)
          > > at
          >
          weblogic.servlet.internal.RequestDispatcherImpl.include(RequestDispatcherImp
          > l.java:482)
          > > at
          >
          weblogic.servlet.internal.RequestDispatcherImpl.include(RequestDispatcherImp
          > l.java:308)
          > > at
          weblogic.servlet.jsp.PageContextImpl.include(PageContextImpl.java:116)
          > at com.epicentric.servlets.ServletUtils.include(ServletUtils.java:150)
          > > at com.epicentric.template.Style.execute(Style.java:538) at
          >
          com.epicentric.taglib.html.IncludeGridTag.doStartTag(IncludeGridTag.java:57)
          > > at jsp_servlet.__index._jspService(__index.java:560) at
          > weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
          > > at
          >
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
          > :265)
          > > at
          >
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
          > :200)
          > > at
          >
          weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImp
          > l.java:242)
          > > at
          >
          com.epicentric.servlets.stackable.SiteDispatcherServlet.service(SiteDispatch
          > erServlet.java:195)
          > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at
          >
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
          > :265)
          > > at
          >
          weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
          > :200)
          > > at
          >
          weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
          > ntext.java:2546)
          > > at
          >
          weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
          > :2260)
          > > at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139) at
          > weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
          >
          >