I ran into a problem where I was unable to create new instances because the ColdFusion instance manager wouldn’t load when I clicked link.

It would just sit in a “loading” status.  Restarting the coldfusion9multi server didn’t help.  Here’s how to debug.

• Find the process id if the coldfusion instance manager
• ps axu | grep cfusion | grep jrun | grep -v grep | awk ‘{print $2}’
• Find all established connections from that process ID
  • lsof -P -n | grep $pid | grep ESTABLISHED

• Look for any established connections to the local IP that are duplicated or remain for more than a few seconds

• Find the process using the port it’s trying to connect to.  This should be another coldfusion process that (likely) unresponsive

  • lsof -P -ni :2936
  • ps axu | grep $pid | grep -v grep

• Kill that process

• Repeat for any others

Viola!  Your Instance Manager should now load again.