ith NativeGSS provider, on server side, when server acquire credential, then estabilish context with client,
calling createCredential() always throw exception error. Please see:
-----------------------------
Caused by: GSSException: Failure unspecified at GSS-API level (Mechanism level: Permission denied)
        at sun.security.jgss.wrapper.GSSLibStub.acquireCred(Native Method)
        at sun.security.jgss.wrapper.GSSCredElement.<init>(GSSCredElement.java:48)
        at sun.security.jgss.wrapper.NativeGSSFactory.getCredentialElement(NativeGSSFactory.java:63)
        at sun.security.jgss.GSSManagerImpl.getCredentialElement(GSSManagerImpl.java:154)
        at sun.security.jgss.GSSCredentialImpl.add(GSSCredentialImpl.java:406)
        at sun.security.jgss.GSSCredentialImpl.<init>(GSSCredentialImpl.java:56)
        at sun.security.jgss.GSSManagerImpl.createCredential(GSSManagerImpl.java:102)
        at SampleServer.main(SampleServer.java:116)
--------------------------------
My code is :

----------------------
            GSSName serverName = manager.createName("sampleServer", krb5PrincipalNameType);
            GSSCredential mycred = manager.createCredential(serverName,
                                        GSSCredential.INDEFINITE_LIFETIME,
                                        krb5Mech,
                                        GSSCredential.ACCEPT_ONLY);

or inputting "null" to GSSName

            GSSCredential mycred = manager.createCredential(null,
                                        GSSCredential.INDEFINITE_LIFETIME,
                                        krb5Mech,
                                        GSSCredential.ACCEPT_ONLY);
------------------------

I got the same error when using above two ways.
This error occur with SQE NativeGSS test suites, and in order to narrow down the problem,
and reproduce it easily, I attached a simple test.
It's from jgss tutorial. Please get it from bugster.
Run test code on lunarorbit.sfbay.
#sh ss ( on server side)
#sh cc ( on client side, on another terminal).
###@###.### 2005-07-08 05:00:36 GMT