Session not replicated in a different machine

Hi Everybody,
          I have an interesting problem related to session replication on a different machine. We have two managed servers in two different machines. When we stop the managed server in the machine where we have admin server, request goes to the second managed server. However the existing session is not replicated, instead a new session is created.
          We have used in-memory replication. Any pointer to the problem will be appreciated.
          Thanks in advance,
          Dev.

Also check if the session replication is indeed on. You can see if this is on by looking at cookies (either javascript like alert(Document.cookie) or through browser like navigator; format for replication should be <session id>!<primary server hash>!<secondart server hash>
S

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Session not replicated in WL6.1

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My trial ended, now my premier pro file will not open on a different machine (it has opened on this machine before). It is saying the "file is damaged" I don't want to loss my edit, how can I access it?

My trial ended, now my premier pro file will not open on a different machine (it has opened on this machine before). It is saying the "file is damaged" I don't want to loss my edit, how can I access it?

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Objects bound to session not replicating properly.

hi,
 i have two weblogic 5.1 sp3 clustered in sun boxes, using apache as
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 I use Inmemory replication for replicating http sessions.
 Both weblogic server says joined the cluster and it seems ok.
 i start navigating my application, halfway i bring down one server, the
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 i am using the property weblogic.httpd.session.cacheEntries=1024, the
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You have not described your environment or what you application is doing, so
 it will be difficult to help answer your question.
 > > i have two weblogic 5.1 sp3 clustered in sun boxes, using apache as
 > > proxy server.
 > > I use Inmemory replication for replicating http sessions.
 > There was a small problem in our application we debugged it, session
 > replication is now fine.
 Good.
 > but now we are facing a new problem.
 Bad.
 > SecurityException
 Please post (or attach) the stack trace.
 > The page doesnot come in the first click, at the first
 > click weblogic gives a SecurityException.
 We do not know what page you mean. Do you mean that every page is broken,
 or pages served by a certain servlet or jsp?
 > Moreover the image is not properly displayed.
 > The image is painted when mouse is over that otherwise
 > its not. Its like image in java without double buffering.
 I assume this is a .jpg or .gif that your page references? Is the image
 created dynamically or just served statically by IIS? Or statically by
 WebLogic?
 The double-buffering look could be caused by a corrupted image file or more
 likely by being served dynamically by a JSP that accidently has some
 linefeeds due to page directives at the top, but you'll have to provide
 additional information.
 Peace.
 Cameron Purdy
 [email protected]
 http://www.tangosol.com
 WebLogic Consulting Available
 "arunbabu" <[email protected]> wrote in message
 news:[email protected]...
 > hi,
 > Thanks for the debug information.
 > There was a small problem in our application we debugged it, session
 > replication is now fine. but now we are facing a new problem.
 > SecurityException, The page doesnot come in the first click, at the first
 > click weblogic gives a SecurityException. Moreover the image is not
 > properly displayed. The image is painted when mouse is over that otherwise
 > its not. Its like image in java without double buffering.
 > could somebody throw some light to these.
 > arunbabu.
 >
 > arunbabu wrote:
 >
 > > hi,
 > > i have two weblogic 5.1 sp3 clustered in sun boxes, using apache as
 > > proxy server.
 > > I use Inmemory replication for replicating http sessions.
 > > Both weblogic server says joined the cluster and it seems ok.
 > > i start navigating my application, halfway i bring down one server, the
 > > one the requests are going to. secondary server takes over, but when i
 > > print the objects that are bound to the session it doesnot give me all
 > > the values, which when printed in the primary server prints all values.
 > > The objects that are bound to the session are heavy.
 > > i am using the property weblogic.httpd.session.cacheEntries=1024, the
 > > default one.
 > > could someone help me.
 > >
 > > my cluster and session properties.
 > >
 > > weblogic.cluster.enable=true
 > > weblogic.cluster.name=rtcluster
 > > weblogic.system.bindAddr=10.11.21.20
 > > weblogic.cluster.multicastAddress=237.0.0.1
 > > weblogic.cluster.multicastTTL=1
 > > weblogic.cluster.defaultLoadAlgorithm=random
 > >
 > > # Httpd Cluster properties.
 > > weblogic.httpd.clustering.enable=true
 > > weblogic.httpd.session.persistence=true
 > > weblogic.httpd.session.persistentStoreType=replicated
 >

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Hmm, OK. Then we need to dig in a little further.
Can you post what the orion-application.xml file looks like for these applications?
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Weblogic Clustering Replica Session not Recovering

Dear All,
Have One domains with WLS 10.3.4 on two physical machines, each machine hosting one managed server, cluster of the two servers, node manager on both servers and admin server on one of the servers. Using unicast and in-memory replication with replicate if clustered set in the weblogic.xml.
Apache balancing between the two and selected options to allow proxy plugin in the domain.
Question is I bring both servers up,
Log the user into test application.
In the console I can see from Cluster Monitoring that a single user connects on Managed Server 1 and that the session is correctly replicated onto Managed Server 2.
I then fail Managed Server 1 which is hosting the primary session, on manual page refresh the users request goes to the Managed Server 2 with the user staying logged in (as expected).
However when I return the failed Managed Server 1 to service I expected the current session now on Managed Server 2 to be replicated back to the Managed Server 1 (in case Managed Server 2 that is now hosting the primary session fails).
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I don't think this is exected behaviour so any idea what is going wrong?
In the oracle docs it says
"In a two-server cluster, the client would transparently fail over to the server hosting the secondary session state. However, replication of the client’s session state would not continue unless another WebLogic Server became available and joined the cluster. For example, if the original primary server was restarted or reconnected to the network, it would be used to host the secondary session state. "
but in this case the second bit does not seem to host the secondary state unless the web page is actually used again (at which point you see the replica state created, it's almost like it will replicate going forwards but ignores the current state and does not re-sync between the managed servers, leading to a user being logging out if a flip-flop server failure test is carried out.
Thanks
Edited by: user10645195 on 18-Feb-2011 08:46
Edited by: user10645195 on 18-Feb-2011 08:52

HI,
The HttpSession replication happens Only when WebLogic creates a New HttpSession or Container encounters "session.setAttribute(obj,obj)" method...It means the Data is replicated to the Secondary JVM HttpSession only when application calls the setAttribute method of HttpSession. And in this case only the modified part of data is replicated NOT the complete HttpSession data.
So i think u can try adding a Simple temporary attribute in the HttpSession like
session.setAttribute("dummyData",""+new java.util.Date());
Now make sure that the above code is placed in each and every page of your application...sothat whenever a client will request the because of setAttribute() the Session modified data (dummyData) will be replicated...and if there are more setAttribute() on that page then all the those also will be replicated...
Example:
Map map = new HashMap();
session.setAttribute("map", map); -------> Here Session data Will be replicated to Node-2 (bcoz of setAttribute()) 
map.put("one", "aaa"); No Replication (Means No Session data Refresh...bcoz setAttribute is not called...)
then from page1.jsp I go to page2.jsp and I do this:
Map map = (Map)session.getAttribute("map");
map.put("two", "bbb"); No Replication (Means No Session data Refresh...bcoz setAttribute is not called...)
and then from page2.jsp I go to page3.jsp and I do this:
Map map = (Map)session.getAttribute("map");
map.put("three", "ccc"); No Replication (Means No Session data Refresh...bcoz setAttribute is not called...)
Now you will see On The node2 the sessioncontains an EMPTY map ! (That is Correct) because when you executed 
Map map = new HashMap();
session.setAttribute("map", map);

At that time The Map was not containing any data in it.

You need to try this:
Map map = new HashMap();
session.setAttribute("map", map);
map.put("one", "aaa"); ----> Now session.setAttribute("map", map); here session data will be refreshed in Node-2
then from page1.jsp I go to page2.jsp and I do this:
Map map = (Map)session.getAttribute("map");
map.put("two", "bbb"); ----> Now session.setAttribute("map", map); here session data will be refreshed in Node-2
and then from page2.jsp I go to page3.jsp and I do this:
Map map = (Map)session.getAttribute("map");
map.put("three", "ccc"); ----> Now session.setAttribute("map", map); here session data will be refreshed in Node-2
It means until u don't call session.setAttribute(---, ---)...The Session Data is not replicated (refreshed) to the Second Node(Secondary JVM).
Thanks
Jay SenSharma
http://middlewaremagic.com/ (Middleware magic Is Here)

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Hi,
I have configured Tomcat 5.5.26 to be clustered across 2 machines with one instance on each. These two machines are behing a BIG-IP loadbalancer which is setup for sticky sessions.
The catalina.out states that the member can see each other:
Jul 3, 2008 6:33:50 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded
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Jul 3, 2008 6:33:51 PM org.apache.catalina.cluster.mcast.McastService registerMBean
The localhost.2008-07-03.log states that the sessions are being replicated for the jsp-examples app - book example. I have an app of our own that does not even state that the session is replicated but I though I would start here with getting the example one working.
Jul 3, 2008 6:34:31 PM org.apache.catalina.core.ApplicationContext log
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However, when I take down the instance which created the session and attempt to refresh the page or navigate to another page I get page cannot be displayed. This shows that the sessions are not completely replicated. What am I missing?
I have added my server.xml file contents:
<Cluster className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
expireSessionsOnShutdown="false"
useDirtyFlag="false"
notifyListenersOnReplication="true">
<Membership
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mcastAddr="239.192.17.20"
mcastPort="9002"
mcastFrequency="500"
mcastDropTime="3000"/>
<Receiver
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tcpListenAddress="auto"
tcpListenPort="9001"
tcpSelectorTimeout="100"
tcpThreadCount="6"/>
<Sender
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="pooled"
ackTimeout="15000"
waitForAck="true"/>
<ClusterListener className="org.apache.catalina.cluster.session.ClusterSessionListener" />
<ClusterListener className="org.apache.catalina.cluster.session.JvmRouteSessionIDBinderListener" />
<Valve className="org.apache.catalina.cluster.tcp.ReplicationValve"
filter=".*\.gif;.*\.js;.*\.css;.*\.png;.*\.jpeg;.*\.jpg;.*\.htm;.*\.html;.*\.txt;"
primaryIndicator="true" />
<Valve className="org.apache.catalina.cluster.session.JvmRouteBinderValve"
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</Cluster>
Any help at all would be greatly appreciated.
Martin

Hi Ganeshmb,
The app I am using is the jsp-examples/book example.
The load balancer is sending requests to both servers.
When the dargle instance is sent a request I can see in the logs of both servers:
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When the tolka instance is sent a request I can see in the logs of both servers:
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Jul 3, 2008 6:33:56 PM org.apache.catalina.cluster.session.DeltaManager start
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WARNING: Manager [jsp-examples], requesting session state from org.apache.catalina.cluster.mcast.McastMember[tcp://10.17.21.125:9001,catalina
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Jul 3, 2008 6:33:56 PM org.apache.catalina.cluster.session.DeltaManager waitForSendAllSessions
INFO: Manager [jsp-examples]; session state send at 7/3/08 6:33 PM received in 123 ms.
The jsp-examples book example is supposed to have serilizable object and was recommended on some sites are the way to test out the replication. Is there any other way to test this?
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If I could prove that the cluster is setup correctly then I would have more to go on when contacting the vendor. At the moment I am unsure if the cluster is setup correctly for session replication.
Thanks,
Martin

Generally when creating a Word file from either a Mac or Win7 pc and opening it on two different machines (either one first) it always prompts that the file is open and will be opened as read only. However opening a CSS file does not prompt that it is alr

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Your server file handling has nothing, and really nothing to do with Adobe software. If files don't get locked for (over-)writing and/or lose connection to the program opening them, then your server is misconfigured. It's as plain and simple and that. Anything from "known file types"/ file associations not being set correctly, MIME types being botched, crooked user privileges and file permissions, missing Mac server extensions, delayed file writing on the server, generic network timeout issues and what have you. Either way, you have written a longwinded post with no real value since you haven't bothered to provide any proper technical info, most notably about the alleged server. Either way, the only way you can "fix" it is by straightening out your server and network configuration, not some magic switch in Adobe's software.
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System.out.println("Loaded Object in Delegate");
System.out.println("Before Loading Home in Delegate");
LmsHome home = (LmsHome )PortableRemoteObject.narrow(obj,com.parx.lms.controller.LmsHome.class);
System.out.println("Loaded Home in Delegate");
lms = home.create();
System.out.println("Loaded remote in Delegate");
public void addUserDelegate(UserVo vo) throws BusinessException{
try{
getController();
System.out.println("Before calling the addUser of Session");
lms.addUser(vo);
}catch(CreateException e){
System.out.println("Create Exception in Delegate due to--->"+e);
e.printStackTrace();
throw new BusinessException(e);
}catch(NamingException e){
System.out.println("Naming Exception in Delegate due to--->"+e);
e.printStackTrace();
throw new BusinessException(e);
catch(RemoteException e){
System.out.println("Remote Exception in Delegate due to--->"+e);
e.printStackTrace();
throw new BusinessException(e);
}catch(LMSException e){
System.out.println("duplicate user name--->"+e);
e.printStackTrace();
throw new BusinessException(e);
pls help me..........

h.put(Context.INITIAL_CONTEXT_FACTORY," ********what should i use here???????*************************")
Each app server provides their own jndi factory class. For ex for weblogic it is weblogic.jndi.WLInitialContextFactory. SInce you are using sun app server, check if there are any examples to find out or the docs.
private static String url="http://localhost:4848
Since the client is in a different machine the localhost is not going to work here. provide the url or the machine name of the system in which ur sunapp server is running. In addition u will need to have the stubs of the remote interfaces in ur client machine.

Standalone oc4j in 3 different machine with clustering enabled

Hello,
I just want to know if clustering is possible in my situation.
I have 3 different machine/server with a load balancer, I've installed a standalone oc4j in each machine, I deploy my application to each of the standalone oc4j, I have enable the clustering of each oc4j using peer to peer configuration.
Machine 1 pointing to node of Machine 2
Machine 2 pointing to node of Machine 3
Machine 3 pointing to node of Machine 1
Then I test my application, for my first try I was pointed to machine 1 by my load balancer, created a session, etc..etc.., after that I stop my application to oc4j machine 1, then after I refresh my page, the load balancer pointed me to machine 2, and there I see that my session is lost. Clustering is not working.
Can anyone guide my if clustering is possible using oc4j's only. Thanks.

I have solved this issue.
It turns out that wls 10.3 does not always delete an application cleanly.
I found 3 copies of the application remaining in the server.
I deleted and reinstalled the wls and the problem was solved.

Session not replicated in a different machine

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