com.mongodb.MongoSecurityException: Exception initializing GSSAPI credentials
	at com.mongodb.connection.GSSAPIAuthenticator.createSaslClient(GSSAPIAuthenticator.java:78)
	at com.mongodb.connection.SaslAuthenticator.authenticate(SaslAuthenticator.java:42)
	at com.mongodb.connection.InternalStreamConnectionInitializer.authenticateAll(InternalStreamConnectionInitializer.java:99)
	at com.mongodb.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:44)
	at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:115)
	at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:128)
	at java.lang.Thread.run(Thread.java:745)
Caused by: GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt)
	at sun.security.jgss.krb5.Krb5InitCredential.getInstance(Krb5InitCredential.java:147)
	at sun.security.jgss.krb5.Krb5MechFactory.getCredentialElement(Krb5MechFactory.java:122)
	at sun.security.jgss.GSSManagerImpl.getCredentialElement(GSSManagerImpl.java:193)
	at sun.security.jgss.GSSCredentialImpl.add(GSSCredentialImpl.java:427)
	at sun.security.jgss.GSSCredentialImpl.<init>(GSSCredentialImpl.java:62)
	at sun.security.jgss.GSSManagerImpl.createCredential(GSSManagerImpl.java:154)
	at com.mongodb.connection.GSSAPIAuthenticator.getGSSCredential(GSSAPIAuthenticator.java:88)
	at com.mongodb.connection.GSSAPIAuthenticator.createSaslClient(GSSAPIAuthenticator.java:65)
	... 6 more