我正在使用kerberos身份验证设置单节点集群
数据节点未启动，日志文件中的n我知道了
2018-10-18 18:30:08,645 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in secureMain
org.apache.hadoop.security.KerberosAuthException: Login failure for user: dn/cocacola.prod.com@PROD.COM from keytab /etc/dn.service.keytab javax.security.auth.login.LoginException: Unable to obtain password from user for name node n other services getting started
Keytab权限为600，请提供帮助。