title: DataStax Enterprise throwing errors when Kerberos is enabled
body: <p>The following error keeps showing up:</p>
  
  <pre><code>ERROR 12:39:10,529 PriviledgedActionException as:cassandra/datastax3.mytest.org@MYTEST.ORG cause:org.apache.hadoop.ipc.RemoteException: GSS initiate failed
  INFO 12:39:10,529 Initiating logout for cassandra/datastax3.mytest.org@MYTEST.ORG
  INFO 12:39:10,529 Initiating re-login for cassandra/datastax3.mytest.org@MYTEST.ORG
  WARN 12:39:13,009 Auth failed for 170.173.220.222:56765:null
  INFO 12:39:13,009 IPC Server listener on 8012: readAndProcess threw exception javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: Failure unspecified at GSS-API level (Mechanism level: Encryption type AES256 CTS mode with HMAC SHA1-96 is not supported/enabled)]. Count of bytes read: 0
  javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: Failure unspecified at GSS-API level (Mechanism level: Encryption type AES256 CTS mode with HMAC SHA1-96 is not supported/enabled)]
  at com.sun.security.sasl.gsskerb.GssKrb5Server.evaluateResponse(GssKrb5Server.java:177)
  at org.apache.hadoop.ipc.Server$Connection.saslReadAndProcess(Server.java:1007)
  at org.apache.hadoop.ipc.Server$Connection.readAndProcess(Server.java:1180)
  at org.apache.hadoop.ipc.Server$Listener.doRead(Server.java:537)
  at org.apache.hadoop.ipc.Server$Listener$Reader.run(Server.java:344)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
  at java.lang.Thread.run(Thread.java:724)
  Caused by: GSSException: Failure unspecified at GSS-API level (Mechanism level: Encryption type AES256 CTS mode with HMAC SHA1-96 is not supported/enabled)
  at sun.security.jgss.krb5.Krb5Context.acceptSecContext(Krb5Context.java:788)
  </code></pre>
  
  <p>Original post: <a href="http://www.datastax.com/support-forums/topic/error-message-in-systemlog-with-kerberos-enabled" rel="nofollow">http://www.datastax.com/support-forums/topic/error-message-in-systemlog-with-kerberos-enabled</a></p>