During add service hdfs in cloudera manager, I am getting error message failed to create tmp directory

问题

I installed cloudera manager 5.12.0 successfully . But when I try to add hdfs service, I got following error message :

failed to create tmp directory . But it was installed. Then try to restart cluster. But if failed to start again . It says no data node role are associated with hdfs . At least one node is required. Could anyone please tell me why I am getting error message like this ? How to solve the problem.

I am using centos 7.

Thanks

来源：https://stackoverflow.com/questions/51485563/during-add-service-hdfs-in-cloudera-manager-i-am-getting-error-message-failed-t