We can run HDFS Rebalance (HDFS Balancer process) from Ambari WebUI and that operation is an asynchronous one, that is just after starting HDFS Rebalance, "HDFS Rebalance" operation finishes but the real Balancer process is running on the NamoNode host. When I want to know whether the Balancer process finished or not, I can confirm by checking whether the Balancer process exists on the host or not. But this way is bothersome. (I know this is not too difficult. But bothersome a little.) I think if I can receive some notification of the completion of the balancer process on Ambari WebUI, that is awesome. Can I detect the completion of HDFS Rebalance invoked from Ambari WebUI on Ambari WebUI? Or, Do I have to check manually whether the balancer process exists or not? ... View more

How do I create one more Zeppelin spark2 interpreter with another configuration? For example, I want to set up that "spark.executor.memory" in a spark2 interpreter is 1024m and one in another spark2 interpreter is 2048m. ... View more

What is "namenode_backup_dir" in Advanced hadoop-env on Ambari? When is this property used? ... View more

I set up Atlas with AD authentication. And I heard that some users failed to log in and the others succeeded. The users said that the users who failed to log in are using "@" in their password. I know I should confirm by my eyes, but before to do that, I want to know what characters are allowed to use for a password of Atlas. Could anyone please answer my question? ... View more