Environmennt: CentOS7 I manually installed the ambari-agent older version (2.2.2.0) and found out it's the wrong version I needed. Then I ran yum to remove it. I updated the repo so I now downloaded and installed the correct version 2.4.0.1. However, when I ran "ambari-agent start", it showed the following error: Verifying Python version compatibility... Using python /usr/bin/pythonChecking for previously running Ambari Agent... Starting ambari-agentVerifying ambari-agent process status... ERROR: ambari-agent start failed. For more details, see /var/log/ambari-agent/ambari-agent.out: ==================== Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/ambari_agent/AmbariAgent.py", line 24, in <module> from Controller import AGENT_AUTO_RESTART_EXIT_CODE File "/usr/lib/python2.6/site-packages/ambari_agent/Controller.py", line 41, in <module> from ambari_agent.ActionQueue import ActionQueue File "/usr/lib/python2.6/site-packages/ambari_agent/ActionQueue.py", line 37, in <module> from ambari_commons.str_utils import split_on_chunks ImportError: cannot import name split_on_chunks ==================== The /var/log/ambari-agent/ambari-agent.out shows the same error above. Seems that I can't cleanly remove the dependencies that installed with the previous version. Even when I tried ambari-agent reset, the same error happened and said "ImportError: cannot import name split on chunks". How to resolve this problem? Many thanks! ... View more