Name Service Error in Red Hat 7.3

Question

Hi, I developed a CORBA application and everything works fine while I use Windows NameService. When I try to use Red Hat 7.3 NameService I get this:
org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 201 completed: No
org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 201 completed: No
at com.sun.corba.se.internal.iiop.ConnectionTable.getConnection(Unknown Source)
at com.sun.corba.se.internal.iiop.ConnectionTable.getConnection(Unknown Source)
at com.sun.corba.se.internal.iiop.GIOPImpl.getConnection(Unknown Source)
at com.sun.corba.se.internal.corba.ClientDelegate.createRequest(Unknown Source)
at com.sun.corba.se.internal.corba.ClientDelegate.createRequest(Unknown Source)
at com.sun.corba.se.internal.corba.ClientDelegate.request(Unknown Source)
at org.omg.CORBA.portable.ObjectImpl._request(Unknown Source)
at org.omg.CosNaming._NamingContextExtStub.rebind(Unknown Source)
I'm using J2SDK 1.4.2 in both Win2000 and Red Hat 7.3. In linux tnameserv looks like it starts fine but when I want to use it from Windows I get the error.
Is there any problem with NameService included in J2SDK 1.4.2 or in Red Hat?
Thanks

Answer 1

The problem may have to do with setting up the /etc/hosts file in Linux.
You should not specify -ORBInitialHost for tnameserv,
it always uses the localhost for tnameserv.
Please include the following lines in the /etc/hosts file and see if it corrects the problem:"
127.0.0.1 localhost
<Static IP If Any> <HostName>
If this isn't the solution, the issue may have to do with setting the -ORBInitialPort property correctly for tnameserv (although we suggest that you use the naming service, orbd, which is new to J2SE 1.4.2 and includes an option for using a persistent naming service). If you do not specify otherwise, the Java IDL naming service listens on port 900 for the bootstrap protocol used to implement the ORB resolve_initial_references() and list_initial_references() methods, as follows:
tnameserv -ORBInitialPort nameserverport&
If you do not specify the name server port, port 900 is used by default. When running Solaris software (not sure about Linux), you must become root to start a process on a port under 1024. For this reason, we recommend that you use a port number greater than or equal to 1024. To specify a different port, for example, 1050, and to run the naming service in the background, from a UNIX command shell, enter:
tnameserv -ORBInitialPort 1050&
From an MS-DOS system prompt (Windows), enter:
start tnameserv -ORBInitialPort 1050
Clients of the name server must be made aware of the new port number. Do this by setting the org.omg.CORBA.ORBInitialPort property to the new port number when creating the ORB object. For more information on using tnameserv in J2SE 1.4.2, see the doc at http://java.sun.com/j2se/1.4.2/docs/guide/idl/tnameserv.html. If you'd like to consider using the newer version of the naming service, you can read about it at http://java.sun.com/j2se/1.4.2/docs/guide/idl/orbd.html.