Cloudera Manager also has a great way to set class level debug  on the fly without restart when needed to troubleshoot.  The way to do this is to navigate to: http://<cm-server>:7180/cmf/debug/logLevel Once at this page, chose the class you wish to change, choose the radio button for the level that you wish to change it to, and hit the submit button.  Understand that these changes will NOT persist a restart of the server but will start logging at the new level as soon as you hit the submit button on the logLevel page. ... View more

The JDK 8 HotSpot JVM is now using native memory for the representation of class metadata and is called Metaspace. The permanent generation has been removed. The PermSize and MaxPermSize are ignored and a warning is issued if they are present on the command line. ... View more

In case ambari API doesn't help. You can use following SQL queries to abort hung/queued/pending operations directly from ambari database.   1) Stop Ambari-Server   ambari-server stop   2) Take backup of ambari database before making any changes to ambari db 3) Check IN_PROGRESS, QUEUED and PENDING operations.   ambari=> select task_id,role,role_command from host_role_command where status='IN_PROGRESS'; ambari=> select task_id,role,role_command from host_role_command where status='QUEUED' limit 100; ambari=> select task_id,role,role_command from host_role_command where status='PENDING';   4) Abort Operations   ambari=> update host_role_command set status='ABORTED' where status='QUEUED'; ambari=> update host_role_command set status='ABORTED' where status='PENDING'; ambari=> update host_role_command set status='ABORTED' where status='IN_PROGRESS';   5) Start ambari-server   ambari-server start       ... View more

Our installation had the password hash in another table.   update ambari.user_authentication set authentication_key='538916f8943ec225d97a9a86a2c6ec0818c1cd400e09e03b660fdaaec4af29ddbb6f2b1033b81b00' where user_id='1'     Note: user_id=1 was the admin in my case.   ... View more

@Vitor Batista are you still having issues with this? Can you accept the best answer or post your solution? ... View more

Hi, Is there any solution to the error found ? I am facing the same issue in my cluster. Appreciate your help in advance. Thanks! ... View more

I know this is an old post. However, I did send out a support inquiry as to WHEN 5.7 will be supported and got the response that it was being tested for Ambari v2.5. That was very early this year. There are various vulnerabilities identified by Oracle related to not running higher than 5.7.11. In particular, the vulnerabilities cover: MySQL Server 5.6.29 and earlier, 5.7.11 and earlier. There are no workarounds or alternatives for this issue...Not good. I am referring to Oracle Support Note 2120034.1 for the preferred solution. This issue was identified by our security team in May 2016. So, my question is this. WHEN will 5.7.11+ be supported? ... View more

After changing to server:port ,it works. Thank you! ... View more