Failed to replicate non-serializable object Weblogic 10 3 Cluster environ

Hi,
We have problem in cluster environment, its showing all the objects in Session needs to be serialized, is there any tool to find what objects in session needs to be serialized or any way to find. There was no issue in WLS 8 when the application again setup in WLS 10, we are facing the session replication problem.
The setup is there are two managed server instance in cluster, they are set to mulicast(and also tried with unicast).
stacktrace:
####<Jun 30, 2010 7:11:16 PM EDT> <Error> <Cluster> <userbser01> <rs002> <[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <> <1277939476284> <BEA-000126> <All session objects should be serializable to replicate. Check the objects in your session. Failed to replicate non-serializable object.>
####<Jun 30, 2010 7:11:19 PM EDT> <Error> <Cluster> <userbser01> <rs002> <[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <> <1277939479750> <BEA-000126> <All session objects should be serializable to replicate. Check the objects in your session. Failed to replicate non-serializable object.>
Thanks,

Hi
Irrespective of WLS 8.x or WLS 9.x, 10.x, in general any objects that needs to be synced/replicated across the servers in cluster should be Serializable (or implement serializable). The object should be able to marshall and unmarshall. Simple reason why it did not showed in WLS 8.x is may be in that version they could not show these details like Error. May be they showed as Info or Warn or Just Ignored it. Weblogic Server became more and more stable and more efficient down the lines like from its oldest version 4.x, 5.x, 6.x, 7.x to latest 10.x. So my guess is they added more logic and more functionality to capture all possible errors and scenarios. I did worked on WLS 8.1 SP4 to SP6 long time back. Could not remember if I saw or did not see these errors for cluster domain with non-serializabe objects. I vaguley remember seeing it for Portal Domains but not sure. I do not have 8.x installed, otherwise I would have given a quick shot and confirm it.
So even though it did not showed up in WLS 8.x, still underneath rule is any object that needs to be replicated that is getting replicated in cluster needs to implement Serializable interface.
Thanks
Ravi Jegga

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>
>
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public class AgentMessage implements Serializable{
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package agentsLibrary;
public class StaticPart implements Serializable{
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     private String mainclass="";
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     public PrivateKey getPrivate() {
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package agentsLibrary;
import java.io.Serializable;
public class DynElement implements java.io.Serializable{
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     public PathEl[] getDpath() {
          return dpath;
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          return dsecret;
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AgentMessage msg=new AgentMessage(name,code,mainclass,signerId,privata,configuration,dclear,dsecret,dpath,c);
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               out.writeObject(msg);
               out.flush();
               s.close();
          } catch (Exception e) {
               return false;
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URGENT : Pass non-serializable objects over sockets

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{snip}
Like this:
public class SerializableLibraryClass extends
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LibraryClass, but is now serializable.Not quite. The base class still isn't Serializable. Take, for example, the following code:
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Pass non-serializable objects over sockets

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D.

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biso wrote:
I am storing an object in the session but after some requests the object gets null. A friend told me that happens because that object is not serializable.
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User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; .NET4.0E)
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at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
Truncated. see log file for complete stacktrace
Caused By: java.io.NotSerializableException: com.thortech.xl.webclient.workflowutil.ImageGenerator$Field
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1164)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at java.util.HashMap.writeObject(HashMap.java:1195)
at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
Truncated. see log file for complete stacktrace
>
<Feb 7, 2012 10:56:48 AM PST> <Error> <Cluster> <BEA-000126> <All session objects should be serializable to replicate. Check the objects in your session. Failed to replicate non-serializable object.
java.rmi.MarshalException: failed to marshal update(Lweblogic.cluster.replication.ROID;ILjava.io.Serializable;Ljava.lang.Object;); nested exception is:
java.io.NotSerializableException: com.thortech.xl.webclient.workflowutil.ImageGenerator$Field
at weblogic.rjvm.BasicOutboundRequest.marshalArgs(BasicOutboundRequest.java:92)
at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:221)
at weblogic.cluster.replication.ReplicationManager_1035_WLStub.update(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
Truncated. see log file for complete stacktrace
Caused By: java.io.NotSerializableException: com.thortech.xl.webclient.workflowutil.ImageGenerator$Field
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1164)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
at java.util.HashMap.writeObject(HashMap.java:1195)
at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
Truncated. see log file for complete stacktrace
>
ERROR,07 Feb 2012 10:56:51,516,[org.apache.struts.actions.DispatchAction],Request[resourceWorkflows] does not contain handler parameter named method
=============================
Anyone encountered this before in the clustered setup ?
Thanks,

Hello,
But if you see the trace, it is coming from the OOTB library. Isn't it ? It doesn't indicate if there is any issue in any custom beans.
java.io.NotSerializableException: com.thortech.xl.webclient.workflowutil.ImageGenerator$FieldMoreover, i see this error in the log with case 2: ("configure" data flow). However, it is working and the the UI is showing me the data flow with this error in the log.
My major concern is case 1: ("edit" workflow) which is not showing me anything on the UI ?
Ideally, it should trigger Nexaweb client to populate the workflows in the UI.
*1 interesting observation:*
If i go to "Design console" -> process definition -> "Render workflow",
then it opens the workflow in the default explorer and the url which is opened in the browser is same as the previous case. It is working here as expected. Does this means the problem is with Nexaweb client load in the UI in case 1. How to fix this ?
Please suggest.
Thanks,
Edited by: oimuser007 on Feb 7, 2012 2:44 PM

Failed to replicate entries in replicated cache

We are using replicated scheme for for the purpose of storing configuration items in the cluster. Once in a while we need to refresh those items in the cache. It has been noticed that during this process some items failed to replicate to other nodes even though the update succeeded in the primary backup.
We are using Coherence 3.7.1.8
We have observed the following messages in the logs of the nodes where replication failed:
Rejected update: Lease: EQ_ETN_STATIC (Cache=mds_guest, Size=77, Version=1/3, IssuerId=18, HolderId=0, Status=LEASE_AVAILABLE, Last locked at Thu Jan 01 01:00:00 GMT 1970)
by Lease: EQ_ETN_STATIC (Cache=mds_guest, Size=77, Version=1/1, IssuerId=18, HolderId=0, Status=LEASE_AVAILABLE, Last locked at Mon Dec 30 13:36:10 GMT 2013)

Hello,
Most of the non-serializable object issue comes because of following two reason
1. Application code issue
2. WLS product bug (sometime)
Please refer following Oracle KM article to know more about troubleshooting Serialization issues.
==> How To Troubleshoot Serialization Problems (Doc ID 1390822.1)
Also you can refer below KM and test JSP page which can detect serializable objects in a web application.
==> Session Replication Fails Due To Non-Serializable Object: JSP Test Page (Doc ID 1073386.1)
Hope this helps.
Regards,
Suraj

Log4j issue with two ears in weblogic cluster

Hi,
I am having issue with log4j.I am having 2 ear files say AppA and AppB.I have used log4j(DailyRollingFileAppender) in both so that logs from AppA gets written to a.log and from AppB gets written to b.log.
This approach is working fine in non-clustered environment(weblogic admin server).
But when i try the same in a clustered(weblogic cluster) environment the logs from both AppA and AppB gets written to a.log.
Could you please help me to resolve this issue.

Include ${weblogic.Name} in your log4j property file thiis will create the log file name with server name
log4j.appender.TEST_LOGGER.File=/logs/${weblogic.Name}_TEST_LOGGER_LOG.txt
Do not keep log4j within your ear
move it to server and include it in your class path of your server.

Weblogic clustering - Non session objects

Hi,
I have an app that doesn't have any HttpSession object or EJBs. We have only one servlet for entire application that works as a controller and we store all the information regarding the user in the servlet instance variable as cache. None of our objects are Serializable. Can i deploy my application on weblogic cluster. Will weblogic support clustering for thsi kind of applications. We have only one servlet and all other classes are normal java classes. No JSP, EJB etc. No HttpSession or ApplicationContext of servlets are being used.
thanks,
webbie.

Hi,
The There are basically two reasons ...for which we want Clustering:
<h3><font color=maroon>Reason - 1): Failover</font></h3>
This feature needs HttpSession replication...Failover means if a Userhas Logged in to our application and accessing some pages ...then his HttpSession Replica will be available in a Secondary WebLogic Server so...even if his Promary WebLogic Server Goes Down ...His Session data will not be lost...and client can interact with the Application without any Interruption. To Enable Failover in your Clustered Application you need to provide the <persistent-store-type>Tag inside your "<Application>/WEB-INF/weblogic.xml"
   <session-descriptor>
      <persistent-store-type>replicated</persistent-store-type>
   </session-descriptor>
<font color=red><b>NOTE:</b> until u dont put <persistent-store-type> Tag inside your "weblogic.xml" file...by default HttpSession replication will be disabled....because it's default value is "inMemory" means even If your Application has HttpSession ... it wont be replicated on Secondary Server.</font>
<h3><font color=maroon>Reason - 2): LoadBalancing</font></h3>
This feature has NOTHING TO DO with HttpSession replication (in general). It means simply different clients request will be processed by different WebLogic Server Instances in a Round-Robin fashion. I Think this is what you want to implement. Because your application is not using any HttpSession .So thet Application willl not have any Failover. But LoadBalancing is the Default Feature of WebLogic Cluster. U need not to do anything additionally to Achieve it.
<font color=green><b>Note:</b>Means Without Having HttpSession Objects in your Application Still u can have WebLogic Clustering Feature to get the benifit of LoadBalancing.</font>
To know more about Session Replication and it's related issues : http://weblogic-wonders.com/weblogic/2009/12/08/session-replication-issues/
Thanks
Jay SenSharma

Failed to replicate non-serializable object Weblogic 10 3 Cluster environ

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