How do I use Kerberos Auth in Java 6?

Hi,
I have a problem with the Kerberos authentication. I have a simple class that tries to connect to an LDAP server using Kerberos. It works great when I use java 5, but with java 6 it fails.
Here is part of the code:
        System.setProperty("java.security.auth.login.config", "/etc/login.conf");
        System.setProperty("java.security.krb5.conf", "/etc/krb5.conf");
        System.out.println("Trying to login using kerberos...");
        KerberosCallbackHandler kerberosCallbak = new KerberosCallbackHandler();
        LoginContext loginContext = new LoginContext(loginContextName, kerberosCallbak);
        loginContext.login();
        System.out.println("Login succeeded");
        //Login succeeds on both java 5 and java 6
        Subject.doAs(loginContext.getSubject(), new JndiAction());
        System.out.println("Connected through Kerberos successfully");The failure happens in the JndiAction:
    public class JndiAction implements PrivilegedExceptionAction<Integer>
        public Integer run() throws Exception
            String username = user + "@" + domain;
            System.out.println("User to connect to Kerberos is " + username);
            System.out.println("Provider URL is: " + url);
            Hashtable<String, String> env = new Hashtable<String, String>();
            env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
            env.put("java.naming.ldap.derefAliases", "finding");
            env.put(Context.PROVIDER_URL, url);
            env.put(Context.SECURITY_AUTHENTICATION, "GSSAPI");
            System.out.println("Trying to create context...");
            new InitialLdapContext(env, null);
            return 0;
    }An exception occures when calling new InitialLdapContext:
Exception in thread "main" java.security.PrivilegedActionException: javax.naming.AuthenticationException: GSSAPI [Root exception is javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid credentials provided (Mechanism level: Server not found in Kerberos database (7))]]
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Unknown Source)
        at KerberosAuth.connectKerberos(KerberosAuth.java:71)
        at KerberosAuth.main(KerberosAuth.java:29)
Caused by: javax.naming.AuthenticationException: GSSAPI [Root exception is javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid credentials provided (Mechanism level: Server not found in Kerberos database (7))]]
        at com.sun.jndi.ldap.sasl.LdapSasl.saslBind(Unknown Source)
        at com.sun.jndi.ldap.LdapClient.authenticate(Unknown Source)
        at com.sun.jndi.ldap.LdapCtx.connect(Unknown Source)
        at com.sun.jndi.ldap.LdapCtx.<init>(Unknown Source)
        at com.sun.jndi.ldap.LdapCtxFactory.getUsingURL(Unknown Source)
        at com.sun.jndi.ldap.LdapCtxFactory.getUsingURLs(Unknown Source)
        at com.sun.jndi.ldap.LdapCtxFactory.getLdapCtxInstance(Unknown Source)
        at com.sun.jndi.ldap.LdapCtxFactory.getInitialContext(Unknown Source)
        at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
        at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
        at javax.naming.InitialContext.init(Unknown Source)
        at javax.naming.ldap.InitialLdapContext.<init>(Unknown Source)
        at KerberosAuth$JndiAction.run(KerberosAuth.java:155)
        at KerberosAuth$JndiAction.run(KerberosAuth.java:1)
        ... 4 more
Caused by: javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid credentials provided (Mechanism level: Server not found in Kerberos database (7))]
        at com.sun.security.sasl.gsskerb.GssKrb5Client.evaluateChallenge(Unknown Source)
        ... 18 more
Caused by: GSSException: No valid credentials provided (Mechanism level: Server not found in Kerberos database (7))
        at sun.security.jgss.krb5.Krb5Context.initSecContext(Unknown Source)
        at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
        at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
        ... 19 more
Caused by: KrbException: Server not found in Kerberos database (7)
        at sun.security.krb5.KrbTgsRep.<init>(Unknown Source)
        at sun.security.krb5.KrbTgsReq.getReply(Unknown Source)
        at sun.security.krb5.internal.CredentialsUtil.serviceCreds(Unknown Source)
        at sun.security.krb5.internal.CredentialsUtil.acquireServiceCreds(Unknown Source)
        at sun.security.krb5.Credentials.acquireServiceCreds(Unknown Source)
        ... 22 more
Caused by: KrbException: Identifier doesn't match expected value (906)
        at sun.security.krb5.internal.KDCRep.init(Unknown Source)
        at sun.security.krb5.internal.TGSRep.init(Unknown Source)
        at sun.security.krb5.internal.TGSRep.<init>(Unknown Source)
        ... 27 moreI want to emphasize that the login function did succeed, and that I try to connect to the same server with the same username and password and same configuration. With java 5 it works, with java 6 it does not.
Does anybody know what I should do to solve this problem?
TIA,
Dikla

Note: This thread was originally posted in the [Java Secure Socket Extension (JSSE)|http://forums.sun.com/forum.jspa?forumID=2] forum, but moved to this forum for closer topic alignment.

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