# HBase用户认证失败
#### 用户问题
HBase用户认证失败。
#### 问题现象
客户侧HBase用户认证失败，报错信息如下：
```
2019-05-13 10:53:09,975 ERROR [localhost-startStop-1] xxxConfig.LoginUtil: login failed with hbaseuser and /usr/local/linoseyc/hbase-tomcat/webapps/bigdata_hbase/WEB-INF/classes/user.keytab.
2019-05-13 10:53:09,975 ERROR [localhost-startStop-1] xxxConfig.LoginUtil: perhaps cause 1 is (wrong password) keytab file and user not match, you can kinit -k -t keytab user in client server to check.
2019-05-13 10:53:09,975 ERROR [localhost-startStop-1] xxxConfig.LoginUtil: perhaps cause 2 is (clock skew) time of local server and remote server not match, please check ntp to remote server.
2019-05-13 10:53:09,975 ERROR [localhost-startStop-1] xxxConfig.LoginUtil: perhaps cause 3 is (aes256 not support) aes256 not support by default jdk/jre, need copy local_policy.jar and US_export_policy.jar from remote server in path ${BIGDATA_HOME}/jdk/jre/lib/security.
```
#### 原因分析
用户使用的JDK中的jar包与MRS服务认证的jar包版本不一致。
#### 处理步骤
1. 以**root**用户登录集群Master1节点。
2. 执行如下命令，查看MRS服务认证的jar包。 
   ll /opt/share/local_policy/local_policy.jar
   ll /opt/Bigdata/jdk{version}/jre/lib/security/local_policy.jar
   
   
3. 将步骤2中的jar包下载到本地。
4. 将下载的jar包替换到本地JDK目录/opt/Bigdata/jdk/jre/lib/security。
5. 执行**cd** *客户端安装目录* **/HBase/hbase/bin**命令，进入到HBase的bin目录。
6. 执行sh start-hbase.sh命令，重启HBase组件。