EJB deployment descriptors in clustered environment

          I was wondering how EJB deployment descriptor settings work in a clustered environment. Are the deployment descriptors per WebLogic instance they are deployed in or the entire clustered environment? For example, if my descriptor for a stateless session ejb has max-beans-in-free-pool set to 5 and I deploy this stateless ejb in 4 WebLogic instances of one cluster, does this mean that there will be a max of 5 instance of this bean in the free pool for the entire cluster or will there be a max of 20 (5 per WebLogic instance and 4 WebLogic instances in the cluster) instances of this bean for the entire cluster?
          Thanks,
          Bryan

Those settings are per server instance.
          Cameron Purdy
          Tangosol, Inc.
          http://www.tangosol.com
          +1.617.623.5782
          WebLogic Consulting Available
          "Bryan Dixon" <[email protected]> wrote in message
          news:3a6b51a0$[email protected]..
          >
          > I was wondering how EJB deployment descriptor settings work in a clustered
          environment. Are the deployment descriptors per WebLogic instance they are
          deployed in or the entire clustered environment? For example, if my
          descriptor for a stateless session ejb has max-beans-in-free-pool set to 5
          and I deploy this stateless ejb in 4 WebLogic instances of one cluster, does
          this mean that there will be a max of 5 instance of this bean in the free
          pool for the entire cluster or will there be a max of 20 (5 per WebLogic
          instance and 4 WebLogic instances in the cluster) instances of this bean for
          the entire cluster?
          >
          > Thanks,
          > Bryan
          >

Similar Messages

Weblogic EJB Deployment Descriptor

Hi,
Can someone help me in learning how to write weblogic specific deployment descriptors for EJBs ??? Where can I find good tutorial or help. I am new to EJB.
Thank you in advance

Why not search http://bea.com and see what pops up. I searched their site for "EJB deployment descriptors" and got quite a few hits.

EJB deployment descriptor vs. annotations

Hi,
I need some example of EJB deployment descriptor and matching Java code with annotations for my school project. In other words I need the same information in descriptor and in annotations. If anyone would provide me with some simple sample, I would be very thankful.
Milan

This shows an ejb-jar.xml file. At the bottom it breaks down what each section does and what annotation it refers to, should be straight forward to create some code snippets from it...
[http://docs.jboss.com/ejb3/app-server/reference/build/reference/en/html/partial_deployment_descriptors.html|http://docs.jboss.com/ejb3/app-server/reference/build/reference/en/html/partial_deployment_descriptors.html]
n

Weblogic vendor specific EJB deployment descriptor

Hi All,
I have been trying to get weblogic-ejb.xml working to provide the names where I want my EJB3 beans accessable in JNDI, but this has not been working for me.
I have been looking through the web - there are not too many mentions of the deployment descriptor. If there any tutorials or official documents from BEA on this, links would be highliy appreciated.
I am using WL10_01 if it helps.
Thanks,
Kirill.

Did you try <business-interface-jndi-name-map> tag in weblogic-ejb-jar.xml?
With the following example setup, you should be able to look up the Session bean that implements service.JPAService interface in JNDI tree with "JPAService".
<weblogic-enterprise-bean>
    <ejb-name>JPAServiceBean</ejb-name>
     <stateless-session-descriptor>
      <business-interface-jndi-name-map>
           <business-remote>service.JPAService</business-remote>
        <jndi-name>JPAService</jndi-name>
      </business-interface-jndi-name-map>
    </stateless-session-descriptor>
    <enable-call-by-reference>true</enable-call-by-reference>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>

About EJB deployment descriptor

Hello. I am developing EJB3 with glassfish and weblogic 10. I know I can use annotations to simplify
deployment without using ejb-jar.xml , sun-ejb-jar.xml, weblogic-ejb-jar.xml. However, I do want to know
how to write these files correctly because they have higher priority when used.
Somebody may give me a template about writing these files? (ejb 3 specification, for ejb2, I can
use xdoclet to generate them).Thanks a lot.

Hi Martin,
you're are right, XDoclet support for OC4J is lacking the most important stuff. In my case I needed explicit mapping of CMR-fields. Of course, manually editing orion-ejb-jar.xml either by using a text editor or JDeveloper is no option at all.
So I've added support for explicit CMR-mapping to the OC4J XDoclet templates. It works but wasn't fun to do as Oracle's documentation of CMR-mapping is highly inconsistent (e.g. text, figures, and example code are not in sync).
As I've done this as part of a services contract, I cannot easily publish the results. I'll ask my client and let you know.
Anyway, orion-ejb-jar.xml will be obsolete by default in OC4J 10.x as Oracle switches to Toplink as the default persistence manager. So again, XDoclet support is needed for generating the Toplink-specific deployment descriptor.
I'd really appreciate Oracle to provide OC4J-specific XDoclet enhancements. This would help OC4J in gaining wider acceptance.
Stefan

EJB Deployment Descriptors not deploying to WLS

Hi,
We're using Eclipse 3.4.1 with the OEPE to target WLS 10.3 with Java 6/JEE 1.4 on a Windows XP Professional development machine.
We have an EJB 2.1 project as part of a larger EAR. The beans (all stateless session beans) and associated interfaces and deployment descriptors within are maintained manually for internal reasons; we do not rely on EJBGen or XDoclet or anything like that to manage these. We are NOT using any annotations in these EJBs, as is the default when you create a bean. Instead we rely on weblogic-ejb-jar.xml and ejb-jar.xml.
We're having an issue where deploying to the local Weblogic server instance fails with the following error displaying in the Eclipse console:
<Dec 19, 2008 9:21:13 AM CST> <Warning> <Deployer> <BEA-149004> <Failures were detected while initiating deploy task for application 'xxxxxxx'.>
<Dec 19, 2008 9:21:13 AM CST> <Warning> <Deployer> <BEA-149078> <Stack trace for message 149004
weblogic.application.ModuleException: Exception preparing module: EJBModule(xxxxxxxEJB.jar)
[EJB:011023]An error occurred while reading the deployment descriptor. The error was:
No EJBs found in the ejb-jar file {0}. Please ensure the ejb-jar contains EJB declarations via an ejb-jar.xml deployment descriptor or at least one class annotated with the @Stateless, @Stateful or @MessageDriven EJB annotation..
     at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:452)
     at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:93)
     at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:387)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
     at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:58)
     Truncated. see log file for complete stacktrace
java.io.IOException: No EJBs found in the ejb-jar file {0}. Please ensure the ejb-jar contains EJB declarations via an ejb-jar.xml deployment descriptor or at least one class annotated with the @Stateless, @Stateful or @MessageDriven EJB annotation.
     at weblogic.ejb.container.dd.xml.EjbDescriptorReaderImpl.createReadOnlyDescriptorFromJarFile(EjbDescriptorReaderImpl.java:199)
     at weblogic.ejb.spi.EjbDescriptorFactory.createReadOnlyDescriptorFromJarFile(EjbDescriptorFactory.java:93)
     at weblogic.ejb.container.deployer.EJBModule.loadEJBDescriptor(EJBModule.java:1198)
     at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:380)
     at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:93)
     Truncated. see log file for complete stacktrace
We DO have multiple beans defined, but it seems that WLS just isn't aware of them due to the lack of a deployment descriptor. It appears that Eclipse/OEPE is not copying the ejb-jar.xml and weblogic-ejb-jar.xml files to the build directory when the project is build:
xxxxxEJB
|-- ejbModule
|.....|-- META-INF
|.....|.....|-- ejb-jar.xml
|.....|.....|-- MANIFEST.MF
|.....|.....|-- weblogic-ejb-jar.xml
|.....|-- com (etc., .java files)
|-- build
......|-- classes
............|-- META-INF
............|......|-- MANIFEST.MF
............|-- com (etc, .class files)
Other notes:
- Cleaning the project does not help.
- Starting a new workspace does not help.
- It works under Eclipse 3.3.2 with the Europa version of OEPE.
- Explicitly exporting an EJB Jar file DOES include the two deployment descriptors (just not deploying to the embedded test server we've defined in our Servers view)
Any ideas? This seems like either a bug in the OEPE, or maybe WTP.

Yes, I have a simple EJB2.1 project with hand-crafted EJB remote/home interfaces/classes and deployment descriptors. Also tried Clean/Rebuild and manually delete
files under /build/classes.
Here are my descriptors files:
ejb-jar.xml
<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar id="ejb-jar_ID" version="2.1" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd">
     <display-name>TestEJB</display-name>
<enterprise-beans>
<session>
<display-name>HelloSessioin</display-name>
<ejb-name>HelloSession</ejb-name>
<home>sessions.HelloSessionHome</home>
<remote>sessions.HelloSession</remote>
<ejb-class>sessions.HelloSessionBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Bean</transaction-type>
<security-identity>
<use-caller-identity/>
</security-identity>
</session>
</enterprise-beans>
</ejb-jar>
weblogic-ejb-jar.xml
<?xml version="1.0" encoding="UTF-8"?>
<weblogic-ejb-jar
xmlns="http://www.bea.com/ns/weblogic/90" xmlns:j2ee="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.bea.com/ns/weblogic/90 http://www.bea.com/ns/weblogic/90/weblogic-ejb-jar.xsd">
<weblogic-enterprise-bean>
<ejb-name>HelloSession</ejb-name>
<stateless-session-descriptor>
</stateless-session-descriptor>
<jndi-name>ejb.HelloSessionRemoteHome</jndi-name>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>
Did you check if there is any error/warning in Error Log view?

Deploying Webapps in clustered environment

Hi All,
We have started the installation of BI 4.1 SP3. We have 3 Application servers on 3 machines (with only one CMS). We have a seperate server for the Tomcat.
We have installed the Tomcat too on the seperate machine.
We did create the BIlaunchpad.properties, CmcApp.properties and opendocument.properties files in the Webapps folder (under BOE).
The properties of the files looks like below,
[email protected]:6400
cms.default=USHPEWSAPP743:6400
Still, we are not able to access the CMS and Launchpad.

Is your configuration any different in the clustered environment? Are you using cache-coordination/synchronization in TopLink?
Any idea of what the application is doing that leads to the server running out of memory?
You may wish to use a memory profiler such as JProfiler or JProbe on the server to determine the cause of the memory leak.

Does pass-by-value in an EJB deployment descriptor work in iAS 6.0 sp4?

I deployed an EJB into iAS 6.0 SP4 with pass-by-value session element set to true but the EJB is still passing by reference. Is this a known problem in SP4? I checked the session descriptor in kregedit for that EJB and I couldn't find any entry that relates to the pass-by-value element.
Please help.

Hi Yudong,
Thanks for the info. Do you know if this is only specific to SP4? The problem seems to be present in SP3 as well.
Thanks

EJB deployment descriptor

Hi
I have jusr started with the EJB. I am using JBoss Server.
I have a session bean and a MessageDrivenBean in the same package. Do I mention both of them in the same ejb-jar.xml file place inside the META-INF directory as follows:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC '-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN' 'http://java.sun.com/dtd/ejb-jar_2_0.dtd'>
<ejb-jar>
<display-name>AccountManager6JAR</display-name>
<enterprise-beans>
<session>
</session>
<message-driven>
</message-driven>
</enterprise-beans>
</ejb-jar>
I addition to the above I also have the jboss.xml file in META-INF directory as follows:
<?xml version="1.0"?>
<jboss>
<enterprise-beans>
<message-driven>
<res-ref-name>.....</res-ref-name>
<configuration-name>.....</configuration-name>
<jndi-name>.....</jndi-name>
</message-driven>
</enterprise-beans>
</jboss>
do I need to add an entry of the my message driven bean in the ejb-jar.xml file or having the jboss.xml file is sufficient??
Many thanks for the help!!

Well, the xml file for JBoss is specific to JBoss. Therefore you should refer to JBoss documentation for that. However, what I suggest is that you make a EAR file out of your jars and then deploy it. That should solve the problem, as EAR file is a standard.
Ironluca

Ejb deployment descriptor tag

Hello,
Is it possible to add specific attributs in addition of the existing tag for an ejb into the ejb_jar file?
thank u
ad

According to the Dtd for ejb-jar.xml the session & entity bean tags
do not have any attributes.
thanks,
Deepak

ExportException+StubNotFoundException in Clustered EJB Deployment

          Hi All,
          I'm a Newbie to WebLogic and would appreciate help in solving my problem.
          I am running WLS 5.1sp6 on NT4 and am trying to implement a two server cluster on one machine.
          The cluster runs fine, but as soon as I try to deploy our EJBs in the cluster level properties file I get the exceptions listed in the attached log.
          In a standalone environment the EJBs function flawlessly but not in a cluster.
          Notice that the EJB is successfully deployed to the server but the exception crops up a little further down the track.
          The only unusual thing about the environment I can think of is the WebLogic CLASSPATH is disabled.
          The EJB deployment descriptor contains:
          <clustering-descriptor>
          <home-is-clusterable>True</home-is-clusterable>
          <stateless-bean-is-clusterable>True</stateless-bean-is-clusterable>
          </clustering-descriptor>
          Any ideas?
          Thanks in advance,
          Andrew
          [weblogic.log]


          Hi all,
          It seems it was a classpath problem ...I put the ejb jar file in the java classpath and now it works like a charm.
          Thanks for the tip Chris!
          Andrew
          "Chris Jones" <[email protected]> wrote:
          >
          >Hi,
          >
          >Sounds like a classpath problem. The cluster is trying to instantiate the EJB but the stub is not in the weblogicclasspath. I’m not sure what you mean when you say it is disabled.
          >
          >Hope this helps,
          >
          >Chris
          >
          >"Andrew Quinan" <[email protected]> wrote:
          >>
          >>
          >>
          >>Hi All,
          >>
          >>I'm a Newbie to WebLogic and would appreciate help in solving my problem.
          >>
          >>I am running WLS 5.1sp6 on NT4 and am trying to implement a two server cluster on one machine.
          >>
          >>The cluster runs fine, but as soon as I try to deploy our EJBs in the cluster level properties file I get the exceptions listed in the attached log.
          >>
          >>In a standalone environment the EJBs function flawlessly but not in a cluster.
          >>Notice that the EJB is successfully deployed to the server but the exception crops up a little further down the track.
          >>
          >>The only unusual thing about the environment I can think of is the WebLogic CLASSPATH is disabled.
          >>
          >>The EJB deployment descriptor contains:
          >><clustering-descriptor>
          >> <home-is-clusterable>True</home-is-clusterable>
          >> <stateless-bean-is-clusterable>True</stateless-bean-is-clusterable>
          >></clustering-descriptor>
          >>
          >>Any ideas?
          >>
          >>Thanks in advance,
          >>Andrew
          >

Deployment of BPEL (and ESB) into Clustered Environment

Hi All,
I was after any view points / pointers into peoples experiences into deployment of BPEL and ESB into a clustered Oracle iAS SOA suite environment, where there are two or more nodes running BPEL, ESB etc with a corresponding OHS Loan Balancers. I have been unable to find any specific information with regards to recommendations into the best ways to deploy into a clustered environment.
My viewpoints are there are two alternative approaches that could be used, both of which use ANT deployment scripts to register / deploy the various services.
(1) Leaving all nodes up in the cluster and using a properties file to specify the relevant details, deploy to one environment allowing the load balancer to distribute the software to the respective nodes in the cluster
(2) Deploy to each of the nodes in turn ensuring all other nodes in the cluster are taken down during each separate deployment
What are other peoples thoughts / experiences / recommendations?
Thanks in Advance
Dave

I don't believe there is any real information on deployments in a cluster in those documents.
There is a note on metalink 457654.1 which says to apply to each node, while doing this shut down the other servers. From experience this worked for some configuration and not others.
Can you say what cluster deployment you used, e.g. 10.1.3.1 or 10.1.3.3 with BPEL and ESB-RT in the same oc4j?
Also what version are you on. If you are on 10.1.3.4 using the 10.1.3.3 deployment configuration you don't need to shutdown the nodes. And you can get away with just deploying to one node but make sure your <ORACLE_HOME>/bpel/system/config/collaxa-config.xml file has been set to cluster = true. Look at metalink note 746251.1.
You can experience the notorious Process Lock Timeout Error when not shutdown cleanly but this is resolved using the best practice guide http://www.oracle.com/technology/tech/soa/soa-suite-best-practices/soa_best_practices_1013x_drop1.pdf
ESB can be applied to just one node.
Make sure that all your endpoints are pointing to the load balancer and not the actual node themselves.
Also you connect string is different in your build.properties make sure of the following
cluster = true
oc4jinstancename = default_group
local.oc4jinstancename = oc4j_soa (or the oc4j container with BPEL)
esb
deployer.uri=deployer:cluster:opmn://hostname:opmn port/default_group
cheers
James

SAP Adapter Best Practice Question for Deployment to Clustered Environment

I have a best practices question on the iway Adapters around deployment into a clustered environment.
According to the documentation, you are supposed to run the installer on both nodes in the cluster but configure on just the first node. See below:
Install Oracle Application Adapters 11g Release 1 (11.1.1.3.0) on both machines.
Configure a J2CA configuration as a database repository on the first machine.
Perform the required changes to the ra.xml and weblogic-ra.xml files before deployment.
This makes sense to me because once you deploy the adapter rar in the next step it the appropriate rar will get staged and deployed on both nodes in the cluster.
What is the best practice for the 3rdParty adapter directory on the second node? The installer lays it down with the adapter rar and all. Since we only configure the adapter on node 1, the directory on node 2 will remain with the default installation files/values not the configured ones. Is it best practice to copy node 1's 3rdParty directory to node 2 once configured? If we leave node 2 with the default files/values, I suspect this will lead to confusion to someone later on who is troubleshooting because it will appear it was never configured correctly.
What do folks typically do in this situation? Obviously everything works to leave it as is, but it seems strange to have the two nodes differ.

What is the version of operating system. If you are any OS version lower than Windows 2012 then you need to add one more voter for quorum.
Balmukund Lakhani
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Howto deploy applications to clustered 10gAS

Hi All,
I have a 10g Application Server which is clustered on 2 nodes. I need to deploy a ear file in this environment. Can someone guide me on how do we do the deployment on a clustered environment.
I have been doing this in a standalone environment using the 3 step wizard thats available in EM, but i dont have any clues on how to do in a clustered environment.
Kindly let me know on how can we deploy applications to 10gAS R3 server on a clustered environment or point me to some links where i can get more info.
Thanks,
Amby.

Hopefully this will help:
http://download.oracle.com/docs/cd/B32110_01/web.1013/b28951/ascontrol.htm#CIHJDECA
Thanks
Shail

JNDI environment properties for EJB in deployment descriptor

Is it possible to deploy an EJB on weblogic 6.0 such that the EJBHome
object is bound using JNDI to a different JNDI server such as ldap
server instead of the weblogic server by specifying JNDI env.
properties like PROVIDER_URL, INITIAL_CONTEXT_FACTORY in the
deployment descriptor? That is use the weblogic built-in deployer but
bind the JNDI names to a different JNDI server. For this, can the
EJBHome objects be treated as just RMI (over IIOP) objects and bind
them (stubs of the RMI objects) using the Sun's JNDI service provider.
The goal is that thereafter the Home JNDI names can be looked up by
RMI clients and the interface methods invoked.
Thanks,
... arun

Must I put the war and jar files in the same ear ?
oh..ft...my boss is killing me ..
package..repackage...package..repackage..and test ??
Could anybody tell me how to refer a SLSB without put the webApp
and the EjbApp together in an Ear file ??
thanks very much!!!!

EJB deployment descriptors in clustered environment

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