@Stephbat  To enable rotation  for the ambari-agent, follow below steps: cp /etc/ambari-agent/conf/logging.conf.sample /etc/ambari-agent/conf/logging.conf  Change the following line: args=('/var/log/ambari-agent/ambari-agent.log',"a", 10000000, 25) Where: The value 10000000 is the maximum size of the logs in bytes and the value 25 is the number of old logs to keep after the log rotates. Restart the ambari-agent after making the changes.  ... View more

@Pamarthich Can you share a complete stack trace of the error ... View more

@Sayed016 I can see there is no "," after Yarn username, Can you try adding"," after yarn user name as shown below yarn.admin.acl=dr.who,user1,yarn,admingroup2   ... View more

@somesh Can you try syncing the users by disabling "Enable Group Search First"   ... View more

@somesh Can you check Ambari => HDFS => Core-site proxy setting try setting the proxy values to * as shown below   hadoop.proxyuser.root.groups=* hadoop.proxyuser.root.hosts=*   ... View more

@khaihustict  Can you confirm is this failing on the same host, Can you try adding the below lines in  bashrc profile:    export LANG=en_US.UTF-8 export LANGUAGE=en_US.UTF-8 export LC_COLLATE=C export LC_CTYPE=en_US.UTF-8   ... View more

@tancy Once logged into Knox SSO, the UI service uses a cookie named hadoop-jwt. The Knox Token Service enables clients to acquire this same JWT token , you can check this jwt token in browser developer tools   Can you confirm are you trying with the local admin user  ... View more