EJB & Servlet deployment in Clustered Env.
Hi,
I have made a cluster of 3 weblogic servers. I would like to send a request to one
server (e.g. http://myserver1:7001/TestServlet). The servlet utilizes an EJB which
is not located and not deployed on myserver1 , but on other 2 servers in the cluster.
The algorithm is round-robin. It gives me a lot of errors (Impl... classes not found
etc etc).
Do I have to deploy everything on all the servers?
If I do that, the request is not routed to other servers. Since the servlet finds
the EJB locally, it never goes to the other servers, regardless of the algorithm.
I have set up the "home-is-clusterable" and all other relevant properties for EJB
deployment.
Any ideas??
Sharad
If the ejb is deployed on the server that is looking for the ejb, then it
won't go network to use the ejb. That is a "big" WL optimization, and helps
quite a bit for most apps.
If you want to segregate the ejb and web functionality, you should probably
consider running two distinct clusters (in 5.1 parlance).
I suggest putting web and ejb together though and clustering that. Latency
is lower. Scalability is not particularly affected. Configuration is much
simpler.
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com
+1.617.623.5782
WebLogic Consulting Available
"Sharad Joshi" <[email protected]> wrote in message
news:[email protected]...
>
> Hi,
>
> I have made a cluster of 3 weblogic servers. I would like to send a
request to one
> server (e.g. http://myserver1:7001/TestServlet). The servlet utilizes an
EJB which
> is not located and not deployed on myserver1 , but on other 2 servers in
the cluster.
> The algorithm is round-robin. It gives me a lot of errors (Impl... classes
not found
> etc etc).
>
> Do I have to deploy everything on all the servers?
> If I do that, the request is not routed to other servers. Since the
servlet finds
> the EJB locally, it never goes to the other servers, regardless of the
algorithm.
> I have set up the "home-is-clusterable" and all other relevant properties
for EJB
> deployment.
>
> Any ideas??
>
> Sharad
Similar Messages
-
Weblogic 7.0 servlets deployment and clustering
I am unable to deploy servlet application in WL 7.0 cluster configuration. I am
using Iplanet NES 4.0 as my web server. I have deployed the weblogic proxy successfully
in iplanet.
The servlet application has class files in exploded form and are present under
bin/applications/DefaultWebApp/WEB-INF/classes folder
web.xml also exists in the above folder.
I receive the following exception.
<Apr 23, 2003 2:26:44 PM EDT> <Error> <socket> <000405> <Uncaught Throwable in
processSockets
java.lang.NullPointerException
java.lang.NullPointerException
at weblogic.servlet.internal.ServletResponseImpl.writeHeaders(ServletResponseImpl.java:968)
at weblogic.servlet.internal.ServletOutputStreamImpl.sendHeaders(ServletOutputStreamImpl.java:239)
at weblogic.servlet.internal.ServletOutputStreamImpl.flush(ServletOutputStreamImpl.java:121)
at weblogic.servlet.internal.ServletOutputStreamImpl.commit(ServletOutputStreamImpl.java:481)
at weblogic.servlet.internal.ChunkOutput.commit(ChunkOutput.java:259)
at weblogic.servlet.internal.ChunkOutputWrapper.write(ChunkOutputWrapper.java:91)
at weblogic.servlet.internal.ChunkWriter.write(ChunkWriter.java:37)
at java.io.Writer.write(Writer.java:148)
at java.io.PrintWriter.write(PrintWriter.java:208)
Please help.
This might be a known bug, please contact support and reference CR100572 to
see if it is also a bug in WLS7.0
sree
"Manju" <[email protected]> wrote in message
news:[email protected]...
>
> I am unable to deploy servlet application in WL 7.0 cluster configuration.
I am
> using Iplanet NES 4.0 as my web server. I have deployed the weblogic proxy
successfully
> in iplanet.
> The servlet application has class files in exploded form and are present
under
> bin/applications/DefaultWebApp/WEB-INF/classes folder
> web.xml also exists in the above folder.
> I receive the following exception.
> <Apr 23, 2003 2:26:44 PM EDT> <Error> <socket> <000405> <Uncaught
Throwable in
> processSockets
> java.lang.NullPointerException
> java.lang.NullPointerException
> at
weblogic.servlet.internal.ServletResponseImpl.writeHeaders(ServletResponseIm
pl.java:968)
> at
weblogic.servlet.internal.ServletOutputStreamImpl.sendHeaders(ServletOutputS
treamImpl.java:239)
> at
weblogic.servlet.internal.ServletOutputStreamImpl.flush(ServletOutputStreamI
mpl.java:121)
> at
weblogic.servlet.internal.ServletOutputStreamImpl.commit(ServletOutputStream
Impl.java:481)
> at
weblogic.servlet.internal.ChunkOutput.commit(ChunkOutput.java:259)
> at
weblogic.servlet.internal.ChunkOutputWrapper.write(ChunkOutputWrapper.java:9
1)
> at
weblogic.servlet.internal.ChunkWriter.write(ChunkWriter.java:37)
> at java.io.Writer.write(Writer.java:148)
> at java.io.PrintWriter.write(PrintWriter.java:208)
>
>
> Please help.
>
-
Servlet error in clustering env.
Guess this is something to do with the servlet clustering configuration. WLS(5.1, sp6) clustering run on Solaris 2.6 with jdk1.2.
Do any one have any idea what could be the problems?
=========================================================
Mon Dec 11 15:58:19 EST 2000:<I> <ServletContext-General> Generated java file: /home/weblogic/5.1/ourserver/cl
assfiles/jsp_servlet/_html/_libraries/_vieworg.java
Mon Dec 11 15:58:20 EST 2000:<E> <ServletContextManager> Servlet request terminiated with Error
weblogic.cluster.replication.BadStatusException: update found 4586531668847271614 but it is not the secondary
at java.lang.Throwable.fillInStackTrace(Native Method)
at java.lang.Throwable.fillInStackTrace(Compiled Code)
at weblogic.rmi.extensions.AbstractRequest.sendReceive(Compiled Code)
at weblogic.cluster.replication.ReplicationManager_WLStub.update(Compiled Code)
at weblogic.cluster.replication.ReplicationManager.updateSecondary(Compiled Code)
at weblogic.servlet.internal.session.ReplicatedSession.sync(Compiled Code)
at weblogic.servlet.internal.session.ReplicatedSessionContext.sync(Compiled Code)
at weblogic.servlet.internal.ServletRequestImpl.syncSession(Compiled Code)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
at weblogic.servlet.internal.ServletContextManager.invokeServlet(Compiled Code)
at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(Compiled Code)
at weblogic.kernel.ExecuteThread.run(Compiled Code)
--------------- nested within: ------------------
weblogic.utils.NestedError: Tried to update secondary, but it thought it was the primary - with nested exceptio
n:
[weblogic.cluster.replication.BadStatusException: update found 4586531668847271614 but it is not the secondary]
at java.lang.Throwable.fillInStackTrace(Native Method)
at java.lang.Throwable.fillInStackTrace(Compiled Code)
at java.lang.Throwable.<init>(Compiled Code)
at java.lang.Error.<init>(Error.java:50)
at weblogic.utils.NestedError.<init>(NestedError.java:23)
at weblogic.servlet.internal.session.ReplicatedSession.sync(Compiled Code)
at weblogic.servlet.internal.session.ReplicatedSessionContext.sync(Compiled Code)
at weblogic.servlet.internal.ServletRequestImpl.syncSession(Compiled Code)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
at weblogic.servlet.internal.ServletContextManager.invokeServlet(Compiled Code)
at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled Code)
at weblogic.socket.MuxableSocketHTTP.execute(Compiled Code)
at weblogic.kernel.ExecuteThread.run(Compiled Code)
You should search in your log for message "Timed out server". If you see this,
it means that your cluster is not healthy.
Long gc is attributed to memory. If you don't have enough heap memory vm will
take more time to do gc and during this time the server won't be able to do any
work. If two servers are running gc's at different times, what you have is two
servers in a cluster timing out each other at different times causing this
problem to aggrevate.
One way to solve the problem is by tuning the server so that you won't run into
this problem.
We designed the system differently to overcome this problem based on our
experience with 4.5 and 5.1. It is not an easy thing to back port this change
into a service pack.
Yes, the fix to minimize the problem did go in 5.1
Let me know if anything is unclear.
Thanks
- Prasad
Joel Nylund wrote:
> I have been working with weblogic support on this one for a while, they say
> its fixed in 6.0 (which sucks for those of us still 4.5.1). They said it
> happens less in sp13 for 4.51, im not sure if there is a similar patch for
> 5.x. I would contact support. They say the reasons for this are one of :
>
> 1.) unreliable network
> 2.) long gc loop or not enough memory (never understood this one)
>
> -Joel
>
> "Key Zhang" <[email protected]> wrote in message
> news:[email protected]...
> >
> > Guess this is something to do with the servlet clustering configuration.
> WLS(5.1, sp6) clustering run on Solaris 2.6 with jdk1.2.
> >
> >
> > Do any one have any idea what could be the problems?
> >
> > =========================================================
> > Mon Dec 11 15:58:19 EST 2000:<I> <ServletContext-General> Generated java
> file: /home/weblogic/5.1/ourserver/cl
> > assfiles/jsp_servlet/_html/_libraries/_vieworg.java
> > Mon Dec 11 15:58:20 EST 2000:<E> <ServletContextManager> Servlet request
> terminiated with Error
> > weblogic.cluster.replication.BadStatusException: update found
> 4586531668847271614 but it is not the secondary
> > at java.lang.Throwable.fillInStackTrace(Native Method)
> > at java.lang.Throwable.fillInStackTrace(Compiled Code)
> > at weblogic.rmi.extensions.AbstractRequest.sendReceive(Compiled
> Code)
> > at
> weblogic.cluster.replication.ReplicationManager_WLStub.update(Compiled Code)
> > at
> weblogic.cluster.replication.ReplicationManager.updateSecondary(Compiled
> Code)
> > at
> weblogic.servlet.internal.session.ReplicatedSession.sync(Compiled Code)
> > at
> weblogic.servlet.internal.session.ReplicatedSessionContext.sync(Compiled
> Code)
> > at
> weblogic.servlet.internal.ServletRequestImpl.syncSession(Compiled Code)
> > at
> weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
> > at
> weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
> > at
> weblogic.servlet.internal.ServletContextManager.invokeServlet(Compiled Code)
> > at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled Code)
> > at weblogic.socket.MuxableSocketHTTP.execute(Compiled Code)
> > at weblogic.kernel.ExecuteThread.run(Compiled Code)
> > --------------- nested within: ------------------
> > weblogic.utils.NestedError: Tried to update secondary, but it thought it
> was the primary - with nested exceptio
> > n:
> > [weblogic.cluster.replication.BadStatusException: update found
> 4586531668847271614 but it is not the secondary]
> > at java.lang.Throwable.fillInStackTrace(Native Method)
> > at java.lang.Throwable.fillInStackTrace(Compiled Code)
> > at java.lang.Throwable.<init>(Compiled Code)
> > at java.lang.Error.<init>(Error.java:50)
> > at weblogic.utils.NestedError.<init>(NestedError.java:23)
> > at
> weblogic.servlet.internal.session.ReplicatedSession.sync(Compiled Code)
> > at
> weblogic.servlet.internal.session.ReplicatedSessionContext.sync(Compiled
> Code)
> > at
> weblogic.servlet.internal.ServletRequestImpl.syncSession(Compiled Code)
> > at
> weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
> > at
> weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
> > at
> weblogic.servlet.internal.ServletContextManager.invokeServlet(Compiled Code)
> > at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled Code)
> > at weblogic.socket.MuxableSocketHTTP.execute(Compiled Code)
> > at weblogic.kernel.ExecuteThread.run(Compiled Code)
> >
-
How to deploy jetspeed 2.1 in clustered env.
pl. suggest me how to deploy jetspeed 2.1 in clustered env.
thanks in advance
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HWF UI work list not loading in BPM worklist page (on clustered env)
hello - Please reply directly as I am not on this alias.
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How do I overcome this or get some meaningfull error info.? The log files donot tell much..
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How to debug with EJB+Servlet+J2ME at the same time?
I am setting up an environment to compile Sun's Smart Ticket J2ME application. However, it run with application exception in the servlet or EJB. I tried to debug. But if I debug the servlet with Embedded AS in JDeveloper, I cannot debug the EJB since the EJB cannot deployed to the embedded AS. (EJB and Servlet must be co-existed in the same AS, at least using same JNDI)
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If the EJB cannot be deployed to the embedded AS, then you should probably use remote debugging to debug the servlet and EJB in the stand-alone AS.
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2. Set your project for remote debugging by checking the Remote Debugging checkbox on the Debugging - Remote panel of the Project Settings dialog. Also you should select the "Attach to OJVM" radio button if you are using OJVM or the "Attach to JPDA" radio button if you are using another JVM (for example HotSpot).
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Hi,
I am running Oracle BPEL 10.1.3.4 on top of Weblogic version 9.x in a clustered env. I created a simple database poller BPEL process (for target table in Oracle database) with below parameters:
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Edited by: AnkitAggarwal on 22-Feb-2010 03:36Hi Ankit,
I have Oracle BPEL env11.1.1.2.0 clustered over 2 nodes.
I am facing a similar issue. In my scenario I have Bpel (with DB poller) and its deployed on the cluster. And I am connected to DB via Multi data source (MDS-1) with only one datasource (DS-1) configured in it.
So whenever I update the table which is being polled, in some cases I have TWO instances and in some cases I have ONE Instance running. My requirement is to have only one instance running every time the DB poller is initiatied.
Kindly help me out.
Thank You
Best Regards
Prasanth -
Dynamic update of EJB/Web deployment descriptors
In 8.1SP3, is there any provision to allow for dynamic update of EJB/Web deployment descriptors? I'm specifically looking at env var changes.
I noticed that there are some mentions of the ability to dynamically update deployment descriptors, but it appears that the general facility has been deprecated, and they've incorporated all of the WebLogic-specific descriptor information directly into the console.
When I dig through the JMX namespace and some of the MBean classes, I also see mentions of "deployment descriptor editors", but it's not clear how to utilize that.
I'm aware of the fact that my application would have to be aware of possible dynamic updates to the descriptors, so I'd have to be able to implement some sort of listener for that.I have the same question but for a different purpose. I am part of a hosting group and we have app teams that have defined init-params in the web.xml that have to be changed as the app is promoted up through test environments and ultimately to production - only we need to be able to do this WITHOUT "cracking open" the archive.
I was hoping to be able to script something to do the update after deployment.
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Thanks,
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HI,
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Info:|Name:JC_hostname |Host:hostname |State:5|
Info:Please check if there are running cluster instances.
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please help us.
ThanksThis sounds like a bug to me. I'd suggest you contact [email protected]
-- Rob
Lars M wrote:
We are running WL 8.1 SP2
When the administration server is running, our ear is deployed to a cluster (2
managed instances on 2 different nodes) using stage mode, and everything is fine.
The problem:
Afterwards, if we try to start a managed server when the administraion server
is down, the managed server cannot activate the deployed application. It reports
that the application path is invalid.
The application path stored in the config.xml (and msi-config.xml) is the upload
path of the administration server (e.g. DOMAIN_HOME/adminserver/upload/OurApp.ear)
- and of course this path is only available on the node where the admin server
is running - and NOT on another hw node where the managed server is running.
Why is the managed server trying to open the original "source" application?
Especially when the application is staged?
Thanks
Lars -
JMS bridge is not working in clustered env
We have set up a JMS bridge between WLS7SP3 and WLS8.1. It works very well in
stand alone server env (testing env). However, we cannot get it to work on clustered
env (preprod env). Anyone has experienced working with clustered env? If so,
please help!
Thanks.
I forgot to say, we are using WLS8.1 SP1
"Pete Inman" <[email protected]> wrote in message
news:[email protected]...
> If you are in a clusterd environment and you deploy a bridge to the WHOLE
> cluster it does not work and will not find the adapter. If you deploy to
the
> INDIVIDUAL cluster members it will work.
>
> We have a cluster with 4 managed servers, deploy to whole cluster - no
> bridge working, deploy to Server1,2,3,4 bridges work fine.
>
> I have a case logged with BEA on this topic.
>
> "Tom Barnes" <[email protected]> wrote in message
> news:[email protected]...
> > "Not working" is too little information. I suggest
> > that you start with the messaging bridge FAQ. There is
> > a link to it here:
> >
> > http://dev2dev.bea.com/technologies/jms/index.jsp
> >
> > Then post with traces, exceptions, configuration, etc, if
> > you are still having trouble.
> >
> > Tom, BEA
> >
> > jyang wrote:
> >
> > > We have set up a JMS bridge between WLS7SP3 and WLS8.1. It works very
> well in
> > > stand alone server env (testing env). However, we cannot get it to
work
> on clustered
> > > env (preprod env). Anyone has experienced working with clustered env?
> If so,
> > > please help!
> > >
> > > Thanks.
> >
>
>
-
How to replicate the EJB state between a clusters
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Any brothers and sisters know how to do it????You can check the chapter - "EJB Clustering" http://ftp.unex.es/oradoc/form_y_report_10g/web.904/b10324/toc.htm
from Oracle Application Server Containers for J2EE Enterprise JavaBeans Developer's Guide -
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I have a WLS 9.1 cluster of 2 machines. My EJB's are targetted to both
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targetted to both machines in the cluster.
One of the EJB's is responsible for sending emails. Every so often I get a
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diagnosis it appears that every once in a while the JNDI lookup for the mail
session returns the MailSession from the opposite machine in the cluster:
IE: the EJB running on server 1, gets the MailSession from server 2, and
vice-versa.
When the same EJB is running in a non clustered env, there are no problems.
And the problem in the cluster is intermittent - sometimes the lookup
succeeds and the EJB gets a handle to the local MailSession object, and
sometimes it fails.
Has anyone else experienced this problem? Is this a known problem? If so,
are there any patches for it?
Thanks,
Brett
The exception is:
javax.naming.ConfigurationException [Root exception is
java.rmi.MarshalException: error marshalling return; nested exception is: \n
java
.io.NotSerializableException: javax.mail.Session]\n at
weblogic.jndi.internal.ExceptionTranslator.toNamingException(ExceptionTra
nslator.java:46)\n at
weblogic.jndi.internal.ExceptionTranslator.toNamingException(ExceptionTranslator.java:78)\n
at weblogic.
jndi.internal.WLContextImpl.translateException(WLContextImpl.java:421)\n at
weblogic.jndi.internal.WLContextImpl.lookup(WLCon
textImpl.java:377)\n at
weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:362)\n at
javax.naming.InitialConte
xt.lookup(InitialContext.java:351)\n at
com.certapay.ejb.Mailer.send(Mailer.java:55)I am having exact same problem (albeit accessing the mail session through spring wrapper). Has anyone got this to work? If not, looks liek a bug in BEA :-).
Anuj -
How to access contextRoot in Servlet deployed in an ear in Weblogic 81
Hi,
I need to access the contextRoot or webapp name from a startup servlet deployed in WebLogic. I've tried the following;
getServletContext().getRealPath("/") return null.
getServletContext().getServerInfo() returns Weblogic 8.1 service pack 3...
getServletContext().getServletContextName() display the <display-name> value from my web.xml.
What I want is the <context-root> value in the EARs application.xml.
I tried the following JNDI lookup and the lookup failed but the error message contained the contextRoot.
String name = (String) jndiContext.lookup("java:/comp/env/namespace");
log.info("jndiContextlookup namespace = "+name);
Any help would be GREATLY appreciated. This should be easy!!
ShaneHi VR
From Weblogic Admin Console, Deployments, on right side click on the link named with your EAR Application. It opens detailed page with more tabs. Click on the tab named Targets. Here select your WebService module and click on Change Targets button. Uncheck the server where it is targetted (Deployed), click on Yes. And activate the changes.
Thanks
Ravi Jegga -
Hello JDev Team,
I want to use SSL encryption and authentication in my InfoSwing BC4J Oracle8i application.
For Local Deployment it's quite transparent you just define appropriate LocalConnection class and SSL works fine.
But for EJB/8i Deployment it's not that clear. As I understand EjbConnection class can accept user/password authentication only.
Do I have to extend oracle.dacf.dataset.connections.Connection class and create my own SSL-oriented Connection with my own setConnectionSpecificEnvs method? Is that a possibility?
Could you please give me some directions on this case?
Thanks,
Victor
nullPlease check the "How to's" in the JDeveloper section of OTN (http://otn.oracle.com). That should shed some light.
Happy researching,
Rajesh -
Reg: How to know name of server in which ejb is deployed
Hello:
Can anyone tell me what the best way to know the name of the server in which
ejb is deployed inside bean class.
Thanks,
VijayBut if i remember using java.net inside is a violation of spec.. and whats
the reason u want to know ant the network level things inside a EJB..
Amar
"Arjuna Chala" <[email protected]> wrote in message
news:3c644718$[email protected]..
if you want to know the system name then the call
System.out.println(java.net.InetAddress.getLocalHost().getHostName())should
work.
"VijayKumar" <[email protected]> wrote in message
news:3c643a2c$[email protected]..
Hello:
Can anyone tell me what the best way to know the name of the server
in
which
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