Zookeeper JAAS Problem

[郝东]

Hi, guys

I am deploying a hbase cluster with Authentication and Authorization enabled.  
I used the HBase Managed Zookeeper. The JAAS file I wrote is as following :

Server {
  com.sun.security.auth.module.Krb5LoginModule required
  useKeyTab=true
  keyTab="mypath"
  storeKey=true
  useTicketCache=false
  principal="myprincipal";
};

But when run " hbase-daemon.sh start zookeeper " on one node, I met the 
following ERROR:
2015-02-16 09:17:09,403 INFO  [main] quorum.QuorumPeerMain: Starting quorum peer
2015-02-16 09:17:09,414 ERROR [main] server.ServerCnxnFactory: No JAAS 
configuration section named 'Server' was foundin '/etc/hbase/conf/server.jaas'.

I don't know what cause this problem, but I am sure the JAAS file exists . Does 
anybody know why? Many Thanks!