[ews.eclipse.technology.rap] Re: Failed to setup RAP application Cluster

[Stefan Roeck <stefan.roeck@xxxxxx>]

Hi,

I suppose that for session failover the whole session content must be 
serializable to allow copying it to another server. That means that most 
stateful RAP class plus SWT have to be serializable which is not the case.

Therefore, session failover will probably not work.

Regards,
Stefan.


zhang schrieb:
> Hi,
>
> We are installing a RAP application Cluster (failover management using 
> SimpleTcpCluster) behind a load balancer (httpd/mod-jk). The load 
> balancer with 4 instances TOMCAT (tcServer-6.0) works fine. But after 
> activating the failover function, we have an exception of "attribut non 
> serialisable".
>
> 09-Sep-2009 10:00:53 SEVERE 
> org.apache.catalina.core.StandardWrapperValve.invoke "Servlet.service()" 
> pour la servlet equinoxbridgeservlet a généré une exception
> java.lang.IllegalArgumentException: "setAttribute": attribut non 
> sérialisable
>     at 
> org.apache.catalina.session.StandardSession.setAttribute(StandardSession.java:1295) 
>
>     at 
> org.apache.catalina.ha.session.DeltaSession.setAttribute(DeltaSession.java:567) 
>
>     at 
> org.apache.catalina.ha.session.DeltaSession.setAttribute(DeltaSession.java:551) 
>
>     at 
> org.apache.catalina.session.StandardSessionFacade.setAttribute(StandardSessionFacade.java:130) 
>
>     at 
> org.eclipse.equinox.http.servlet.internal.HttpSessionAdaptor.setAttribute(HttpSessionAdaptor.java:96) 
>
>     at 
> org.eclipse.rwt.internal.service.SessionStoreImpl.<init>(SessionStoreImpl.java:40) 
>
>     at 
> org.eclipse.rwt.internal.service.ContextProvider.getSession(ContextProvider.java:152) 
>
>     at 
> org.eclipse.rwt.internal.engine.RWTDelegate.doPost(RWTDelegate.java:61)
>     at 
> org.eclipse.rap.ui.internal.servlet.RequestHandler.service(RequestHandler.java:51) 
>
>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>     at 
> org.eclipse.equinox.http.servlet.internal.ServletRegistration.handleRequest(ServletRegistration.java:90) 
>
>     at 
> org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:111) 
>
>     at 
> org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:59) 
>
>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>     at 
> org.eclipse.equinox.servletbridge.BridgeServlet.service(BridgeServlet.java:156) 
>
>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>     at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
>
>     at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
>
>     at 
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 
>
>     at 
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
>
>     at 
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) 
>
>     at 
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
>
>     at 
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
>
>     at 
> org.apache.catalina.ha.tcp.ReplicationValve.invoke(ReplicationValve.java:347) 
>
>     at 
> org.apache.catalina.ha.session.JvmRouteBinderValve.invoke(JvmRouteBinderValve.java:210) 
>
>     at 
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
>     at 
> org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
>     at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
>     at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:769)
>     at 
> org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:698) 
>
>     at 
> org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:891) 
>
>     at 
> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690) 
>
>     at java.lang.Thread.run(Thread.java:619)
>
> Did you have any experience on setup of RAP application Cluster ?
>
> Thanks
> Lifei