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If you are certain you are issuing the mongrel_rails command from your RAILS_ROOT (if not, this error is usually what you'd see) - then make sure the permissions of your RAILS_ROOT/log folder is chmod 755 and there is indeed a mongrel.log file there (if not, it should automatically create one anyway)

Turned out I accidentally moved the log file to the wrong directory. It's working now.

Thanks for the help -- I appreciate it.

Hi again,

So this worked for me last night after I moved the log folder back to its correct location and the occasional mongrel_rails restart was working all evening.

Now I just tried to restart mongrel and I got this error:

!!! PID file log/mongrel.pid does not exist.  Not running?
mongrel::restart reported an error. Use mongrel_rails mongrel::restart -h to get help.


I assume mongrel is running, as my site is working fine. I double-checked that the log folder is in the correct directory and that its permissions are 755. There is a /log/mongrel.log file, but its permissions are 666. Is that correct or is there some other problem?

Hi Niamh,

The error  " mongrel.pid does not exist. " will occur when you run mongrel restart command in the absence of log/mongrel.pid file. I have fixed the issue now.  

If you face this problem in future just issue a command
$ ps aux

Then note the mongrel's proc_id from the shown list
$ kill -9 <proc_id>

Then issue the command
$  mongrel_rails start -e production -p <port> -d

Hi Vinayan,

I'm having this problem again. I tried ps aux to find mongrel's proc_id, but I get the following message:

grep: aux: No such file or directory

Hi - Please try the command

[~]# ps

instead of "ps aux" . Let us know if you need any further assistance. Thank you

Thanks! That worked.