We're running a fairly big Qmail site and have all essential services
monitored with paging and such. (SMTP, POP, PING, all that)
Now, what happened last night was that qmail-send got stuck.
Everything else was working perfectly, just the Email wasn't being sent
anywhere. The only way we noticed it was clients complaining about not
getting any mail they knew was sent. When I checked the system, the queue was
at over 500 Meg.
Telling qmail-send to quit didn't help, nor did a regular kill of it, I
eventually had to kill -9 the process. When I started it up again, all was
fine.
The question is how best to monitor that qmail-send is alive and well?
All the processes were there, just not doing anything.
Ideas anyone?
Greg
