Ambari agent not starting after host clean up

[#1]

Hi all,

I had to clean up a host which had ambari and HDP running. I deleted all repos, rpm packages, directories, users and all (may be missed a few 😞

Now when I try to install ambari-agent, it shows below messg (file exists ..) before completing installation.

Total download size: 20 M Installed size: 31 M Is this ok [y/N]: y Downloading Packages: ambari-agent-2.2.2.0-460.x86_64.rpm | 20 MB 00:00 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : ambari-agent-2.2.2.0-460.x86_64 1/1 ln: creating symbolic link `/usr/lib/python2.6/site-packages/ambari_commons': File exists ln: creating symbolic link `/usr/lib/python2.6/site-packages/resource_management': File exists ln: creating symbolic link `/usr/lib/python2.6/site-packages/ambari_jinja2': File exists ln: creating symbolic link `/usr/lib/python2.6/site-packages/ambari_simplejson': File exists ln: creating symbolic link `/usr/lib/python2.6/site-packages/resource_management': File exists ln: creating symbolic link `/usr/lib/python2.6/site-packages/ambari_jinja2': File exists Verifying : ambari-agent-2.2.2.0-460.x86_64 1/1 Installed: ambari-agent.x86_64 0:2.2.2.0-460 Complete!

And when I try to restart ambari-agent, it is not starting ... can somebody help me what to do ...

[root@str17 /]# ambari-agent restart Restarting ambari-agent Verifying Python version compatibility... Using python /usr/bin/python ambari-agent is not running. No PID found at /var/run/ambari-agent/ambari-agent.pid Verifying Python version compatibility... Using python /usr/bin/python Checking for previously running Ambari Agent... Starting ambari-agent Verifying 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 22, in <module> import ambari_simplejson as json ImportError: No module named ambari_simplejson ==================== Agent out at: /var/log/ambari-agent/ambari-agent.out Agent log at: /var/log/ambari-agent/ambari-agent.log [root@str17 /]# service ambari-agent status ambari-agent currently not running [root@str17 /]# ambari-agent start Verifying Python version compatibility... Using python /usr/bin/python Checking for previously running Ambari Agent... Starting ambari-agent Verifying 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 22, in <module> import ambari_simplejson as json ImportError: No module named ambari_simplejson ==================== Agent out at: /var/log/ambari-agent/ambari-agent.out Agent log at: /var/log/ambari-agent/ambari-agent.log

[#2 · Accepted solution]

@PJ

You are getting the following error which indicates that the ambari agents python libraries are having either version mismatch or the missing package.

 <module> import ambari_simplejson as json ImportError: No module named ambari_simplejson 

.

- So you should uninstall ambari-agent

- Then clean the following packages form that host. This time you will need to make sure that the following directories are cleaned properly.

rm -f /usr/lib/python2.6/site-packages/ambari_commons
rm -rf /usr/lib/python2.6/site-packages/resource_management
rm -rf /usr/lib/python2.6/site-packages/ambari_jinja2

rm -rf /var/lib/ambari-agent/
rm -rf /usr/lib/ambari-agent/

- Now install the ambari-agent again

.

[#3]

Yes, I could install it successfully after cleaning up the python libraries. Thanks