Error:"No handlers could be found for logger "ambari_agent.AmbariConfig"" when starting an Ambari agent

SupportKB

Problem Description:
When starting ambari-agent, the following error is displayed:

ambari-agent start
Verifying Python version compatibility...
Using python  /usr/bin/python
Checking for previously running Ambari Agent...
Checking ambari-common dir...
Starting ambari-agent
/var/lib/ambari-agent/bin/ambari-agent: line 185:   707 Killed                 
 nohup $PYTHON $AMBARI_AGENT_PY_SCRIPT "$@" > $OUTFILE 2>&1
Verifying ambari-agent process status...
ERROR: ambari-agent start failed. For more details, see /var/log/ambari-agent/ambari-agent.out:
====================
No handlers could be found for logger "ambari_agent.AmbariConfig"
No handlers could be found for logger "ambari_agent.AmbariConfig"
Ambari prefix dir %s not configured, can't continue
====================
Agent out at: /var/log/ambari-agent/ambari-agent.out
Agent log at: /var/log/ambari-agent/ambari-agent.log

In /var/log/ambari-agent/ambari-agent.log, the following is displayed:

File contains no section headers.
file: /etc/ambari-agent/conf/ambari-agent.ini, line:

Cause:
This indicates that the /etc/ambari-agent/conf/ambari-agent.ini file is either corrupted or have some invalid characters. In this case, there were junk lines at the beginning of the file when copying the file to update ambari-agent.ini.
Solution:
To resolve this issue, remove the junk lines from /etc/ambari-agent/conf/ambari-agent.ini and start ambari-agent.

About:
This article created by Hortonworks Support (Article: 000007433) on 2018-06-05 21:33
OS: All
Type: Configuration
Version: All