[AMBARI-18427] Agent 2.4.0.1 start error "cannot import name split_on_chunks" after upgrade

• Type: Bug
• Status: Open
• Priority: Blocker
• Resolution: Unresolved
• Affects Version/s: 2.4.0
• Component/s: ambari-agent

Environment

HDP 2.3

• Assignee: Unassigned
• Reporter: Hari Sekhon
• Created: 21/Sep/16 08:10
• Updated: 22/Sep/16 23:37

Description

I hit this issue yesterday after upgrading ambari-agent:

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
====================

I'm not the first person to have encountered it, see:

https://community.hortonworks.com/questions/55968/ambari-agent-start-failed-2.html

Considering this is an existing cluster the solution of rm -rf'ing the entire python2.6 site-packages seems excessive...