EJB Client Access From JDeveloper9iR2

I seem to be running into a lot of problems when trying to get a simple EJB client to talk to an EJB on our 9IAS platform. I have developed a simple session bean (just to test) which simply returns a string. When I create the default client code this works fine using the embedded OC4J server in Jdeveloper but I can't run a similar client against 9IAS when I deploy the code. When I go through the client wizard it seems to produce the same code as the standalone EJB OC4J client. I simply changed the name of the server (Context.PROVIDER_URL, "ormi://pe2500/). This is the parameter code I use:
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.evermind.server.rmi.RMIInitialContextFactory");
env.put(Context.SECURITY_PRINCIPAL, "admin");
env.put(Context.SECURITY_CREDENTIALS, "welcome");
env.put(Context.PROVIDER_URL, "ormi://pe2500:23891/MyEJBs");
This is the output I receive:
D:\jdeveloper9ir2\jdk\bin\javaw.exe -ojvm -classpath D:\javadev\ejbservlet\ejbservlet\WEB-INF\classes;D:\jdeveloper9ir2\jdev\lib\jdev-rt.jar;D:\jdeveloper9ir2\j2ee\home\lib\ojsp.jar;D:\jdeveloper9ir2\j2ee\home\jsp\lib\taglib\ojsputil.jar;D:\jdeveloper9ir2\j2ee\home\oc4j.jar;D:\jdeveloper9ir2\j2ee\home\lib\servlet.jar;D:\jdeveloper9ir2\jdev\lib\ojc.jar;D:\jdeveloper9ir2\j2ee\home\lib\activation.jar;D:\jdeveloper9ir2\j2ee\home\lib\ejb.jar;D:\jdeveloper9ir2\j2ee\home\lib\jaas.jar;D:\jdeveloper9ir2\j2ee\home\lib\jaxp.jar;D:\jdeveloper9ir2\j2ee\home\lib\jcert.jar;D:\jdeveloper9ir2\j2ee\home\lib\jdbc.jar;D:\jdeveloper9ir2\j2ee\home\lib\jms.jar;D:\jdeveloper9ir2\j2ee\home\lib\jndi.jar;D:\jdeveloper9ir2\j2ee\home\lib\jnet.jar;D:\jdeveloper9ir2\j2ee\home\lib\jsse.jar;D:\jdeveloper9ir2\j2ee\home\lib\jta.jar;D:\jdeveloper9ir2\j2ee\home\lib\mail.jar;D:\jdeveloper9ir2\j2ee\home\oc4j.jar;D:\jdeveloper9ir2\lib\xmlparserv2.jar;D:\jdeveloper9ir2\lib\xmlcomp.jar;D:\jdeveloper9ir2\j2ee\home\oc4j.jar;D:\jdeveloper9ir2\j2ee\home\lib\servlet.jar Samplemypackage6.ctejb1Client3
javax.naming.NamingException: Lookup error: java.net.ConnectException: Connection refused: connect; nested exception is:
     java.net.ConnectException: Connection refused: connect
     java.lang.Object com.evermind.server.rmi.RMIContext.lookup(java.lang.String)
          RMIContext.java:134
     java.lang.Object javax.naming.InitialContext.lookup(java.lang.String)
          InitialContext.java:350
     void Samplemypackage6.ctejb1Client3.main(java.lang.String[])
          ctejb1Client3.java:18
Process exited with exit code 0.
Can anyone tell me if this is the correct communication method for client EJB's talking to the 9IAS server?
Any help really appreciated.
Chris Taylor

hi Chris Taylor, did you find the solution for this error. i too get this error and i am looking for the answer. if you find any answer please share with me too. if i get any answer for this i will reply you too.

Similar Messages

EJB deployment/access from the Client Machine

I want to deploy/access the EJB on the Oracle 8i server from the
Client Machine. From the Oracle 8i server machine i am able to
deploy and access the EJB
When i am trying to deploy/access the EJB i am getting the
following message
javax.naming.CommunicationException: Unknown service : sess_iopp
url
Please tell me what to do ?
Thanks in advance
null

Are you using JDeveloper? If yes then go to File|New->Snippets
and select 'Example JServer EJB Client' to create an EJB client.
: javax.naming.CommunicationException: Unknown service :
sess_iopp
It's sess_iiop not iopp ;-)
Regards,
Arun
Manish Patel (guest) wrote:
: I want to deploy/access the EJB on the Oracle 8i server from
the
: Client Machine. From the Oracle 8i server machine i am able to
: deploy and access the EJB
: When i am trying to deploy/access the EJB i am getting the
: following message
: javax.naming.CommunicationException: Unknown service :
sess_iopp
: url
: Please tell me what to do ?
: Thanks in advance
null

Naming Problems with EJB when accessing from WebApplication

Hi all,
I'm trying to deploy an application consisting of several stateless session beans, one message driven bean and a web application. Everything works fine, until I try to log in (webapp). Then I get the following error:
com.sap.engine.services.jndi.persistent.exceptions.NameNotFoundException: Path to object does not exist at ik, the whole lookup name is ik/sec/IKAuthenticationEJB.
So the lookup name ik/sec/IKAuthenticationEJB is used in the code, whereas the JNDI Name of the requested bean is
sap.com/Integrationkernel/IKAuthenticationEJB (As showed in the Admin Tool). I'm wondering why there is this "sap.com" as I choosed a different name for the provider (But the error remains even if I change it to "sap.com").
As I cannot find any information about the "NameNotFoundException" I just tried the following:
- add a "ejb-ref" section to web.xml
<ejb-ref>
     <ejb-ref-name>ik/sec/IKAuthenticationEJB</ejb-ref-name>
     <ejb-ref-type>Session</ejb-ref-type>
     <home>com.tsystems.ik.security.authentication.IKAuthenticationEJBHome</home>
     <remote>com.tsystems.ik.security.authentication.IKAuthenticationEJBRemote</remote>
     <ejb-link>sap.com/Integrationkernel/IKAuthenticationEJB</ejb-link>
</ejb-ref>
- add a web-j2ee-engine.xml to the Web Application:
     <web-j2ee-engine>
         <ejb-ref>
            <ejb-ref-name>ik/sec/IKAuthenticationEJB</ejb-ref-name>
            <jndi-name>sap.com/Integrationkernel/IKAuthenticationEJB</jndi-name>
        </ejb-ref>
     </web-j2ee-engine>
Does anybody know what to do? Did I declare the references in a wrong way?
Is there a complete API Javadoc available? I just found the very small one on SDN...
Thanks a lot,
Nadine

Hi Nadine,
in order to lookup ab EJB from a web component you have to declare an ejb reference (ejb-ref section) in the web.xml. The jndi name in the web-j2ee-engine.xml can be omitted if you are sure that the information provided by the "ejb-ref" section is sufficient to identify the EJB component.
From the example you wrote I see that the ejb-link element is not correct. According to the EJB 2.0 FR specification (Appendix B, page 518) "ejb-link element must be the ejb-name of an enterprise bean". Probably this inconsistent information misleads the EJB Container in resolving the right reference.
My advice is simply to omit this and leave the "home" and "remote" elements. They should be enough.
A hint: you can use the "lsn" shell command from the "naming" group to observe the JNDI tree on a particular server node.
I hope this will help you.
Best regards,
Svetoslav

EJB JNDI access from app1 to app2 in same oc4j (standalone) 9.0.4

I have two applications CatalogosWeb and WSCatalogosWeb both in the same instance of a 9.0.4 standalone OC4J. The first one implements a set of EJB's (both entity and session). In the second i have the EJB classes included int the "classes" directory.
When I try to acces de EJB from the second application I get a ClassCastException.
The source code is approximately:
ic = new InitialContext(env);
where env is>
{java.naming.provider.url=ormi://localhost:23791/CatalogosWeb, java.naming.factory.initial=com.evermind.server.rmi.RMIInitialContextFactory, java.naming.security.principal=admin, java.naming.security.credentials=welcome}
later I try to access the EJB>
Object objref = ic.lookup(jndiHomeName);
Object obj = PortableRemoteObject.narrow(objref, className);
When the PortableRemoteObject tries to "narrow" the class I get the ClassCastException.

user496903 ,
When you need to perform lookups within the same OC4J container, you don't use RMIInitialContextFactory. Instead, you should use the new InitialContext() constructor, that defaults the initial context factory property to (if my memory doesn't fail) ApplicationInitialContextFactory...
Look for more info in the Oracle App Server EJB developer Guide,
hope it helps
RB

Ejb remotly accessed from different ejb without parent tag

Hi,
is there any way, how to access EJB A deployed in a.aer from another EJB B deployed in b.ear? a.ear and b.ear are deployed at the same IAS 9.0.4.2 and neither of these EAR's is parent EAR ( don't want to use parent tag)?
Thank you very much for any advice.
Eugen

Hi,
is there any way, how to access EJB A deployed in a.aer from another EJB B deployed in b.ear? a.ear and b.ear are deployed at the same IAS 9.0.4.2 and neither of these EAR's is parent EAR ( don't want to use parent tag)?
Thank you very much for any advice.
Eugen

Client access from W7 to Server 2008 with SQL Express 2008 R2 not possible anymore (since installing yesterdays patches)

Hi everyone!
We are suddenly having Problems to access our SQL Express Server from our Clients (SBS 2008 with W7 clients).
Till yesterday evening everything was working fine. At night we installed the latest MS patches für our Server 2008 (SBS2008).
Since then we are not able to connect to the SQL Express Server over the Network. Locally (on the Server) it runs fine.
Switching the Windows Firewall off on the Server also lets the clients connect ...
The Windows Firewall still has all the ports open needed for SQL Server, we havn't changed anything.
All the incoming rules that worked for years are still there (untouched).
We just deinstalled all the latest patches, but problem still is here ... not sure if this was just a coincidence ...
Any ideas what could be the Problem?
Thanks in advance for your help
Best regards
Thomas

Check firewall rules
enable traffic on TCP 1433 and UDP 1434 (if isn't a named instance) or check sql using ports.
Check Sql Server Browser in Configuration Manager and also net protocols.
let's know about it
Best regards,
P.Ceglie
Questo post è fornito "così com'è". Non conferisce garanzie o diritti di alcun tipo. Ricorda di usare la funzione "segna come risposta" per i post che ti hanno aiutato a risolvere il problema e "deseleziona come risposta" quando
le risposte segnate non sono effettivamente utili. Questo è particolarmente utile per altri utenti che leggono il thread, alla ricerca di soluzioni a problemi similari. ENG: This posting is provided "AS IS" with no warranties, and confers no rights.
Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Ejb Client Access (ClassCastException)

This is the problem which i am facing for two weeks.
My deployment is doing fine.
When i try to run my Client i get an error like
java.lang.ClassCastException
and some sentences related to PortableRemoteObject.narrow.
I am not able to fix the bug.
Can any body help me out
[email protected]

Can you post the client code where you get the exception.

How can I exclude client IP address from access log using WebServer 6.0? WebServer 3.x has Do not log client accesses from: option under Log Preferences". But I cant find it when we upgrade to 6.0

Hi,
Please go through the below link.
http://docs.iplanet.com/docs/manuals/enterprise/60sp1/ag/esmonsvr.htm#18110
I hope this helps. If you need any help let me know.
Regards,
Dakshin.
Developer Technical Support
Sun Microsystems
http://www.sun.com/developers/support.

EJB access from applet on Linux

Hi,
I've been trying for 2 days now to access an EJB in JServer from a Java Applet running in the Java Plugin 1.2.2 in Netscape on Linux.
After loading the applet web page the plugin fires up and downloads a whole bunch of needed classes. Then I get this exception:
java.lang.ExceptionInInitializerError: org.omg.CORBA.INITIALIZE: can't instantiate default ORB implementation
com.visigenic.vbroker.orb.ORB minor code: 0 completed: No
at org.omg.CORBA.ORB.create_impl(ORB.java, Compiled Code)
at org.omg.CORBA.ORB.<clinit>(ORB.java:202)
at oracle.aurora.jndi.orb_dep.Orb.init(Orb.java, Compiled Code)
at oracle.aurora.jndi.orb_dep.IRFinder.getObject(IRFinder.java, Compiled Code)
at oracle.aurora.jndi.orb_dep.IRFinder.initialReferences(IRFinder.java, Compiled Code)
at oracle.aurora.jndi.sess_iiop.SessionCtx.initialContext(SessionCtx.java, Compiled Code)
at oracle.aurora.jndi.sess_iiop.SessionCtx.<init>(SessionCtx.java, Compiled Code)
at oracle.aurora.jndi.sess_iiop.ServiceCtx.createSession(ServiceCtx.java, Compiled Code)
at oracle.aurora.jndi.sess_iiop.ServiceCtx.login(ServiceCtx.java, Compiled Code)
at oracle.aurora.jndi.sess_iiop.ServiceCtx.defaultSession(ServiceCtx.java, Compiled Code)
at oracle.aurora.jndi.sess_iiop.ServiceCtx.lookup(ServiceCtx.java, Compiled Code)
at oracle.aurora.jndi.sess_iiop.sess_iiopURLContext.lookup(sess_iiopURLContext.java, Compiled Code)
at oracle.aurora.jndi.sess_iiop.sess_iiopURLContext.lookup(sess_iiopURLContext.java, Compiled Code)
at javax.naming.InitialContext.lookup(InitialContext.java, Compiled Code)
at vtsi.location.NearSelectionApplet.start(NearSelectionApplet.java, Compiled Code)
at sun.applet.AppletPanel.run(AppletPanel.java, Compiled Code)
at sun.plugin.navig.motif.MotifAppletViewer.maf_run(MotifAppletViewer.java, Compiled Code)
at sun.plugin.navig.motif.MotifAppletViewer.run(MotifAppletViewer.java, Compiled Code)
at java.lang.Thread.run(Thread.java, Compiled Code)
The frustrating part is that the same applet works just fine when called in a Win NT broswer (IE and Netscape) or appletviewer. A java test application accessing the EJB also runs fine on Linux.
The only obivious difference is that my Windows machine has the Java Plugin 1.3 installed and Linux only 1.2.2. But since the applet has been compiled with the 1.2.2 compiler that shouldn't really make a difference, should it?
I'd appreciate any help on this subject.
Thx,
Thomas J.

i could answer this
but my colleagues are working on a client which uses client(applet) to access stateless session beans
but mine's giving a little problem
visit my problem for some of the overview which i think will be fixed or
the same could run on your machine
http://forum.java.sun.com/thread.jsp?forum=13&thread=538583&tstart=0&trange=15

We have created shared folder on multiple client machine in domain environment on different 2 OS like-XP,Vista, etc. from some day's When we facing problem when we are access from host name that shared folder is accessible but same time same computer when

Hello All,
we have created shared folder on multiple client machine in domain environment on different 2 OS like-XP,Vista, etc.
from some day's When we facing problem when we are access from host name that shared folder is accessible but same time same computer when we are trying to access the share folder with IP it asking for credentials i have type again and again
correct credential but unable to access that. If i re-share the folder then we are access it but when we are restarted the system then same problem is occurring.
I have checked IP,DNS,Gateway and more each & everything is well.
Pls suggest us.
Pankaj Kumar

Hi,
According to your description, my understanding is that the same shared folder can be accessed by name, but can’t be accessed be IP address and asks for credentials.
Please try to enable the option below on the device which has shared folder:
Besides, check the Advanced Shring settings of shared folder and confrim that if there is any limitation settings.
Best Regards,
Eve Wang
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

How do I find the MAC address of a CLIENT ACCESS POINT created from the FILE SERVICES ROLE

I have several Client Access Points created within the clustered File Services Role. The only way I seem to be able to determine the MAC address of each of these, is by visiting the DHCP server.
Does anyone know if there is a way of reporting on this from the server (active node) itself? I have tried ipconfig all, checked the properties of the CAP in the FCS console etc.
Many thanks.
Kathleen Hayhurst Senior IT Support Analyst

Hi,
As far as I know there have no original option for query all the CAP MAC address, may you can create a PowerShell command then filter the configuration result, you can ask
in PowerShell forum for the further help.
More information:
PowerShell forum:
http://social.technet.microsoft.com/Forums/en-US/bf0e249b-a9f3-4bef-a536-c210b3f09340/powershell-script-to-alert-on-failed-system-state-backups?forum=winserverpowershell
The related KB:
Failover Clusters Cmdlets in Windows PowerShell
http://technet.microsoft.com/en-us/library/hh847239.aspx
The related article:
PowerShell for Failover Clustering: Frequently Asked Questions & Enabling CSV
http://blogs.msdn.com/b/clustering/archive/2009/05/23/9636665.aspx
Hope this helps.
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Can a session EJB be accessed by more than one client?

Hello,
I would like to have an instance of a persistent EJB which is accessible by more than one client and which will not be destroyed after usage. Apparently session beans can only be accessed by one client and are created every time they are accessed. In my case this creation is quite time and resource consuming. Is it an alternative to use an entity bean instead, even if the logic of the bean doesn't have anything to do with direct database access?
Thanks.

It seems to me that what you want is exactly a session bean will do. The EJB container is responsible to maintain a certain number instances (configurable) of your session bean and serve multiple clients at the same time. Session beans are not necessarily destroyed after serving a client. If you configure your ejb server to have a pool size of 2 to 100, then you will always have at least 2 instances (no more than 100 even there are a lot of client access) of this ejb ready to serve. The only thing not clear to me is that do you want to use only ONE instance of this bean or you don't care as long as multiple clients can access this bean's service? Since you mentioned that there is not a real database access, you can certainly use a Singleton but a 'regular' session bean with static fields should do it also if these fields will not be modified by clients.
PC

ejb-client-jar example from the core specification

Hello all,
the ejb3.0 specification says (chapter 60 page 241):
the jar file that contains the client should contain one of the following:
a reference to the ejb-client JAR file
a reference to the ejb-jar file that contains the client view classes
a copy of the client view classes There is also an example on page 242:
In this example, the Bean Provider has chosen to package the enterprise bean client view classes in a
separate jar file and to reference that jar file from the other jar files that need those classes. Those classes
are needed both by ejb2.jar, packaged in the same application as ejb1.jar, and by ejb3.jar,
packaged in a different application. Those classes are also needed by ejb1.jar itself because they
define the remote interface of the enterprise beans in ejb1.jar, and the Bean Provider has chosen the
by reference approach to making these classes available.
The deployment descriptor for ejb1.jar names the client view jar file in the ejb-client-jar
element. Because ejb2.jar requires these client view classes, it includes a Class-Path reference to
ejb1_client.jar.
The Class-Path mechanism must be used by components in app2.ear to reference the client view jar
file that corresponds to the enterprise beans packaged in ejb1.jar of app1.ear. Those enterprise
beans are referenced by enterprise beans in ejb3.jar. Note that the client view jar file must be
included directly in the app2.ear file.
    app1.ear:
        META-INF/application.xml
        ejb1.jar Class-Path: ejb1_client.jar
            deployment descriptor contains:
                <ejb-client-jar>ejb1_client.jar</ejb-client-jar>
        ejb1_client.jar
        ejb2.jar Class-Path: ejb1_client.jar
    app2.ear:
        META-INF/application.xml
        ejb1_client.jar
        ejb3.jar Class-Path: ejb1_client.jarNow finally my questions are:
1. Why did we need to include the ejb1_client.jar in app2.ear (or even in app1.ear), wasn't it enough to deploy the ejb1_client.jar separately then refer to it (using class-path in Manifest, or may be just by using <ejb-client-jar>) as the bullets quoted first suggest?
2. How come we didn't need to use <ejb-client-jar> for ejb2.jar
3. Since both of ejb1.jar and ejb2.jar are packaged in app1.ear couldn't we simply refer to the ejb1_client.jar in the Manifest file of app1.ear?
Please, I appreciate your input on this

I am guessing here and please correct me if I am wrong:
ejb1.jar uses interfaces in ejb1_client.jar as the interface for some of the beans so we needed to use ejb-client-jar and we needed a reference in the manifest file.
ejb2.jar uses some of the claess/interfaces as may be a return type but not as an interface for one of its beans so we didn't need to use ejb-client-jar but we needed an entry in the manifest file.
regarding app1.ear, we can put the ejb1_client.jar in the META-INF/lib app1.ear without the need for any entries in the manifest files.
Edited by: malrawi on Jun 14, 2009 11:59 PM

DFS network drive giving error to many clients of Windows 7 and 8.1 after accessing from run

Hi,
My network drive (DFS) is giving below error after upgrade OS from windows 2008 to 2012. On many clients of windows 7 and 8.1 we are able to resolve
by rebooting the system or by net use * /d command. But many user still getting error after accessing from mapped drive as well as from RUN command.
some area stupid thing happening, after accessing from RUN like \\networkdrive then it will open successfully and show all the shared folder. When we
click on particular shared folder it gives below error message and some works perfectly fine. Even though that person have rights on both the shared folder.
"""""check to make sure that the disk is properly inserted, or that you are connected to the internet or your network, and then
try again. If it still cannot be located, the information might have been moved to a different location. """"
Kindly suggest what should I do now?
Inder Johar

Hi Inder Johar,
Please check if clients could connect to \\domain\dfsroot and UNC path. You could refer to the article below to troubleshoot the issue:
DFS mapping error: Refers to a location that is unavailable
http://jthys.wordpress.com/2013/02/20/dfs-mapping-error-refers-to-a-location-that-is-unavailable/
Please Note: Since the website is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.
It’s simple enough to use a tool like ROBOCOPY or the File Server Migration Tool (FSMT) to copy your previous created folders over to the new name space
\\networkdrive.
Robocopy
http://technet.microsoft.com/en-us/library/cc733145.aspx
Microsoft File Server Migration Toolkit 1.2
http://www.microsoft.com/en-us/download/details.aspx?DisplayLang=en&id=10268
Regards,
Mandy
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Add Client access server with DR MBX to server clients from DR site.

Hello,
We have a medium size implementation at our company. It is as below,
- Two mail box servers (MBX1, MBX2) at production Site.
- One mail box server (MBXDR01 at DR site (Active))
- One DAG (name: IDKUDAG ) (MBX1,MBX2 and MBXDR01 are members)
- Two Client access servers at production site (with MBX1 and MBX2)
There is a high speed WAN connection between two sites.
What I need to do, I want to add additional CAS server at DR site as in case of production site maintenance or outage I want to migrate the DBs to DR MBX and the CAS server handle mail
client’s access.
Can I add a new server at the DR site with the same configuration as the production site???
Or there is another solution for this case.
Please advise.
Best regards,
Ahmed Salah
BR Ahmed Aboutabl

Hi Ahmed,
The CAS configuration for Exchange service in the second datacenter can be the same configuration as you mentioned. For example, the same internal&external namespaces for OWA, Autodiscover, EWS, OAB etc. in two datacenters.
Also make sure the certificate has included all needed namespace for the second site. For your reference, here is an article talked about the details of site resilients:
https://technet.microsoft.com/en-us/library/dd638129(v=exchg.150).aspx
http://www.msexchange.org/articles-tutorials/exchange-server-2010/high-availability-recovery/designing-site-resilient-exchange-2010-solution-part1.html
Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make
sure that you completely understand the risk before retrieving any suggestions from the above link.
Regards,
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected]
Winnie Liang
TechNet Community Support

EJB Client Access From JDeveloper9iR2

Similar Messages

Maybe you are looking for