"CommunicationException: Unknown service" - CORBA helloworld

I have installed 8i on NT (meanwhile praying for the linux port),
and was able to get the CORBA helloworld example to compile and
"loadjava" into Aurora. I can run it locally using the supplied
"runit.bat" file, but when trying to connect to it from a remote
client I consistently get the following exception at the point of
"lookup" with the JNDI context -
the ic.lookup(serviceURL+objectName) line:
>>
System Error: javax.naming.CommunicationException: Unknown
service: 10.1.3.233:2481:TORVOLDS
System Error: at
oracle.aurora.jndi.sess_iiop.SessionCtx.initialContext(SessionCtx
.java:507)
System Error: at
oracle.aurora.jndi.sess_iiop.SessionCtx.<init>(SessionCtx.java:35
System Error: at
oracle.aurora.jndi.sess_iiop.ServiceCtx.createSession(ServiceCtx.
java:130)
System Error: at
oracle.aurora.jndi.sess_iiop.ServiceCtx.login(ServiceCtx.java:295
System Error: at
oracle.aurora.jndi.sess_iiop.ServiceCtx.defaultSession(ServiceCtx
.java:185)
System Error: at
oracle.aurora.jndi.sess_iiop.ServiceCtx.lookup(ServiceCtx.java:32
0)
System Error: at
oracle.aurora.jndi.sess_iiop.sess_iiopURLContext.lookup(sess_iiop
URLContext.java:215)
System Error: at
oracle.aurora.jndi.sess_iiop.sess_iiopURLContext.lookup(sess_iiop
URLContext.java:201)
System Error: at
javax.naming.InitialContext.lookup(InitialContext.java:288)
System Error: at
fmg.client.corba.Client.main(Client.java:43)
<<
The listener log shows me successfully connecting:
>>
19-JUL-99 19:49:32 * SUCCESS *
(ADDRESS=(PROTOCOL=tcp)(HOST=10.1.3.233)(PORT=2481)) * establish
* giop * 0
<<
There have been a couple newsgroup posting about this problem on
the net but no answers. Hoping one of you all out there might
have a clue.
This exception occurs with jdk1.1.7 on linux, and under JBuilder2
on Win98. The helloworld example itself was compiled with
jdk1.1.8 on NT.
TIA...
Scott Fraser
FMG Technologies, Inc.
null

ok, i've moved to 8.1.7.
I'm using linux version but my problem now is when i try to connect to ejb [in code:
CustomerHome ch = (CustomerHome)ic.lookup ("sess_iiop://myhost:2481:db1/test/customer");]NamingException caught:javax.naming.NameNotFoundException: Nothing bound for specified name [Root exception is org.omg.CosNaming.NamingContextPackage.NotFound]
I've inserted in my classpath reference to aurora_client.jar (in which org.omg.CosNaming.NamingContextPackage.NotFound is present).
Please help me.
Thanks in advance.

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at
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at
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java:130)
at
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null

Gabriel Maties (guest) wrote:
: I have managed to run success the very simple example in the
demo
: list. This was on the same server (AIX).
: $ORACLE_HOME/javavm/demo/examples/corba/basic/jdbcimpl
: I transferred the client classes on an NT machine (Visual
: Cafe)and tried to run the same example. This was the error :
: Build Successful
: loading Client.class for debugging...
: Client.class successfully loaded
: javax.naming.CommunicationException: Unknown service:
: 10.142.10.157:2481:statsdb
: at
oracle.aurora.jndi.sess_iiop.SessionCtx.initialContext(SessionCtx
: .java:507)
: at
oracle.aurora.jndi.sess_iiop.SessionCtx.<init>(SessionCtx.java:35
: at
oracle.aurora.jndi.sess_iiop.ServiceCtx.createSession(ServiceCtx.
: java:130)
: at
oracle.aurora.jndi.sess_iiop.ServiceCtx.login(ServiceCtx.java:295
: at
oracle.aurora.jndi.sess_iiop.ServiceCtx.defaultSession(ServiceCtx
: .java:185)
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oracle.aurora.jndi.sess_iiop.ServiceCtx.lookup(ServiceCtx.java:32
: 0)
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: at Client.main(Client.java:29)
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: Am I missing something (e.g. allow the client machine to
connect
: to IIOP). I've got the same error when I ran it from another
UNIX
: machine.
: Thank you.
Hi Gabriel:
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Thank you.
null

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null

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null

Thank for the quick reply!
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Thanks again!
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JDeveloper Team (guest) wrote:
: Hi Frank,
: couple of things to look out for
: - >create a database connection through the connection manager
in
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: See if the connection is successful and you are able to see the
: deployed ejb.
: -> second make sure you have added the client side generated
jar
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: regards
: raghu
: Frank Zhang (guest) wrote:
: : Hi All:
: : I used JDeveloper 2 to deploy the helloworld EJB sample. The
: : deployment wnet well and I am able to see test/Hello object
: under
: : Published JServer Objects. However, I am having trouble to
call
: : Hello thru the Client application and got the following
error:
: : javax.naming.CommunicationException: Unknown service:
: : 127.0.0.1:900:2481test
: : at
oracle.aurora.jndi.sess_iiop.SessionCtx.initialContext(Compiled
: : Code)
: : at
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: : at
oracle.aurora.jndi.sess_iiop.ServiceCtx.createSession(Compiled
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null

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Thank for the quick reply!
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I left off sid in the url and did not include the jar in my
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Thanks again!
Frank
JDeveloper Team (guest) wrote:
: Hi Frank,
: couple of things to look out for
: - >create a database connection through the connection manager
in
: JDeveloper using your parameters 127.0.0.1 (host ) 900 (port)
: 2481test(sid). ( I grepped this from your error message)
: See if the connection is successful and you are able to see the
: deployed ejb.
: -> second make sure you have added the client side generated
jar
: files as part of your project properties for the project.
: regards
: raghu
: Frank Zhang (guest) wrote:
: : Hi All:
: : I used JDeveloper 2 to deploy the helloworld EJB sample. The
: : deployment wnet well and I am able to see test/Hello object
: under
: : Published JServer Objects. However, I am having trouble to
call
: : Hello thru the Client application and got the following
error:
: : javax.naming.CommunicationException: Unknown service:
: : 127.0.0.1:900:2481test
: : at
oracle.aurora.jndi.sess_iiop.SessionCtx.initialContext(Compiled
: : Code)
: : at
: : oracle.aurora.jndi.sess_iiop.SessionCtx.<init>(Compiled Code)
: : at
oracle.aurora.jndi.sess_iiop.ServiceCtx.createSession(Compiled
: : Code)
: : at oracle.aurora.jndi.sess_iiop.ServiceCtx.login(Compiled
: : Code)
: : at
oracle.aurora.jndi.sess_iiop.ServiceCtx.defaultSession(Compiled
: : Code)
: : at
: : oracle.aurora.jndi.sess_iiop.ServiceCtx.lookup(Compiled Code)
: : at
oracle.aurora.jndi.sess_iiop.sess_iiopURLContext.lookup(Compiled
: : Code)
: : at
oracle.aurora.jndi.sess_iiop.sess_iiopURLContext.lookup(Compiled
: : Code)
: : at javax.naming.InitialContext.lookup(Compiled Code)
: : at Client.main(Compiled Code)
: : Any helps are greatly appreciated!
: : Frank
null

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****** CODE *************
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} catch(NamingException nE) {
System.out.println("ASIF: Error en el lookup: " + nE.getExplanation());
System.out.println("ASIF: " + nE.toString());
nE.printStackTrace();
System.exit(-1);
**************** ERROR ******************
ASIF: Error en el lookup: Unknown service: 200.12.145.40:2482:SCANALES
ASIF: javax.naming.CommunicationException: Unknown service: 200.12.145.40:2482:SCANALES
javax.naming.CommunicationException: Unknown service: 200.12.145.40:2482:SCANALES
at oracle.aurora.jndi.sess_iiop.SessionCtx.initialContext(SessionCtx.java:647)
at oracle.aurora.jndi.sess_iiop.SessionCtx.<init>(SessionCtx.java:67)
at oracle.aurora.jndi.sess_iiop.ServiceCtx.createSession(ServiceCtx.java:161)
at oracle.aurora.jndi.sess_iiop.ServiceCtx.login(ServiceCtx.java:349)
at oracle.aurora.jndi.sess_iiop.ServiceCtx.defaultSession(ServiceCtx.java:219)
at oracle.aurora.jndi.sess_iiop.ServiceCtx.lookup(ServiceCtx.java:373)
at oracle.aurora.jndi.sess_iiop.sess_iiopURLContext.lookup(sess_iiopURLContext.java:256)
at oracle.aurora.jndi.sess_iiop.sess_iiopURLContext.lookup(sess_iiopURLContext.java:242)
at javax.naming.InitialContext.lookup(InitialContext.java:350)
at SimpleQueueSender.main(SimpleQueueSender.java:152)**********************************************
Last, from the %J2EE_HOME%\lib\classes\jndi.properties:
java.naming.factory.initial=com.sun.enterprise.naming.SerialInitContextFactory
java.naming.factory.url.pkgs=com.sun.enterprise.naming
The weird thing is that when I remove %J2EE_HOME%\lib\j2ee.jar from the classpath, the lookup works fine again but, of course, I can't use the jms classes.
From the "Unknown service" message, I presume that the problem is related to the service provider and/or something with the environment properties.
PLEASE ANY HELP!!
Thanks.

This seems weird enough for bringing to the attention of the JNDI technical team.
If you have not already done so, you might want to send this message directly to them at [email protected]
There seems to be some incompatibility between Oracle classes and J2EE 1.3 classes. As you have pointed out, in some service provider classe(s).

"CommunicationException: Unknown service" - CORBA helloworld

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