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Old 07-06-2012, 02:17 AM   #1
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Spawned ruby process by mod_passenger on apache 2 taking 100% CPU

Hi all,

I have installed mod_passenger on my Apache 2 under Debian Squeeze 64 bits.
My problem is that, just starting apache with mod_passenger enabled (no site configured to use it) spaws a ruby process that eats all available cpu.

I'm pretty sure this is a misconfiguration on my part, but I'm not quite sure where it comes from and how to track down the problem. It used to work perfectly and a some point it went wrong.

Any hint on how to identify the problem who be immensely appreciated !

Thanks !
Old 07-06-2012, 03:02 PM   #2
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I don't know if you should run Passenger w/o site configuration but there's at least one bug listed at and there's a nice writeup on how to debug Rails processes at (never mind the Nginx part), the latter may help you ident the problem.
Old 07-10-2012, 08:55 AM   #3
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Sorry for the slow reply and thanks for your help.
Running passenger with or without site config didn't change anything (there used to have a site configured, but I disabled it for testing purposes when I discovered the problem), but in fact, the problem didn't come from there.

I suspect it came from the leap second on June 30th that wasn't handled correctly for some reason by Passenger/Ruby.
In fact I found this thread describing the same problem I had.
The solution was "just" to reboot the server and indeed, it works now.

I still don't know where the real problem was though, but at least my server works.

Thanks again!


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