[AMBARI-24560] Better debugging for agent start failure due to stuck fuser call

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0
• Labels: pull-request-available
• Assignee: Andrew Onischuk
• Reporter: Andrew Onischuk
• Created: 29/Aug/18 10:38
• Updated: 16/Oct/18 11:07
• Resolved: 16/Oct/18 11:07

Description

While debugging with we encountered an issue where call to `fuser 8670/tcp` it got blocked for minutes

• in fact we did not ever see the agent start and had to comment the call. Two
  improvements:

• Need timeout for such calls (lets also research and see why the call may get stuck). We checked that the port was free.
• Need more debug logging in the initial start up path to help debug what command is getting stuck - in main.py, and PingPortListener.py lets see if more debug logging can be added

Issue Links

• links to: GitHub Pull Request #2197