搭建好的Hadoop集群环境突然在启动的时候抛出异常信息，之前测试很正常，后来仔细看了下抛出的异常信息，发觉很可能是权限的问题。这里对这个异常信息做一个简要的记录希望可以帮到以后遇到这样的问题的人，同时也为自己留作备忘录。

异常信息

[hadoop@hadoopwy2 bin]$ ./zkServer.sh start
JMX enabled by default
Using config: /usr/local/zookeeper3.4/zookeeper-3.4.5/bin/../conf/zoo.cfg
Starting zookeeper ... ./zkServer.sh: line 113: /usr/local/zookeeper3.4/zookeeper-3.4.5/tmp/zookeeper_server.pid: Permission denied
FAILED TO WRITE PID
[hadoop@hadoopwy2 bin]$ ./zkServer.sh: line 109: ./zookeeper.out: Permission denied

截图：

既然上面显示permission denied那么应该说是权限的问题了

接下来找到Zookeeper所在的路径为整个文件夹赋权限。

[hadoop@hadoopwy1 zookeeper3.4]$ su
Password:
[root@hadoopwy1 zookeeper3.4]# chmod a+wxr zookeeper-3.4.5/
[root@hadoopwy1 zookeeper3.4]# cd zookeeper-3.4.5/

这样在启动Zookeeper应该就可以了，./skServer.sh start启动即可。

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Zookeeper异常：FAILED TO WRITE PID与Permission denied

异常信息

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