安巴利2.7.4 hdp3.1.4
启用kerberos后无法启动journalnode
标准输出：

org.apache.hadoop.security.KerberosAuthException: failure to login: 
for principal: jn/raw.githubusercontent.com@EAST.COM from keytab /etc/security/keytabs/jn.service.keytab 
javax.security.auth.login.LoginException: Unable to obtain password from user

真奇怪！ principal: jn/raw.githubusercontent.com 在正常情况下，我的校长应该 jn/myhost 我不知道这个网址（raw.githubusercontent.com）是从哪里来的？
错误：

resource_management.core.exceptions.ExecutionFailed: 
Execution of 'ambari-sudo.sh su hdfs -l -s /bin/bash -c 'ulimit -c unlimited ; /usr/hdp/3.1.4.0-315/hadoop/bin/hdfs --config /usr/hdp/3.1.4.0-315/hadoop/conf --daemon start journalnode'' returned 1. 
WARNING: HADOOP_JOURNALNODE_OPTS has been replaced by HDFS_JOURNALNODE_OPTS. Using value of HADOOP_JOURNALNODE_OPTS.