Rails app start script in crontab

I recently created a rails 3.0.5 app, and it appears that this line was added to my crontab:

8,28,48 * * * * /home/<user>/webapps/<app>/bin/start

As a result, I get emails every 20 minutes with the following errors, presumably because it's trying to start an nginx instance that's already running:

[emerg]: bind() to 0.0.0.0:11323 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:11323 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:11323 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:11323 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:11323 failed (98: Address already in use)
[emerg]: still could not bind()

I changed the line in my crontab to run restart instead of start, but I'm not sure whether it's even necessary. Should I just delete it?

nginx crontab rails

asked 04 Aug '11, 01:35

chrispix
30●1●2●7
accept rate: 100%

Hi,

You should not remove as it is meant to restart your in case its nor unning. You can instead redirect its output to /dev/null by adding "> /dev/null 2>&1"

(04 Aug '11, 01:49) neeravk

@neeravk isn't it better to run restart then, since it's most likely already running? I've never seen this on an nginx installation before.

(04 Aug '11, 18:48) chrispix

[Edit] Using restart is fine. However, it will terminate active sessions, so redirecting the output to /dev/null will allow this to fail silently as expected.

(04 Aug '11, 19:50) johns ♦♦

Ah, good point about sessions. Thanks @johns!

(05 Aug '11, 12:48) chrispix

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nginx ×183
rails ×105
crontab ×48

question asked: 04 Aug '11, 01:35

question was seen: 1,684 times

last updated: 05 Aug '11, 12:48

Rails app start script in crontab

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