@jjjjjjhao,   The bits of errors provided don't tell enough of the story to indicate what may be wrong.   I would run: service cloudera-scm-agent restart  and then see what happens in the agent log.    Also, what is the actual problem?  What is wrong in Cloudera Manager, etc.  It is unclear what you are trying to do or see and what actually happens.  Once that is clarified, the community can help.   Ben ... View more