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From: Pai-Hung Chen <paihungchen@hotmail.com>
To: mongrel-unicorn@rubyforge.org
Subject: Re: How to automate the restarting of Unicorn?
Date: Mon, 10 Oct 2011 20:34:19 +0000 (UTC)	[thread overview]
Message-ID: <loom.20111010T222728-376@post.gmane.org> (raw)
In-Reply-To: 4E928ADD.8040900@whitepages.com

> On 10/10/2011 08:04 AM, Devin Ben-Hur wrote:

> >> My question is: By the time the "before_exec" hook is executed, is it
> >> guaranteed that unicorn.pid.oldbin ahas lready created (otherwise we
> >> have a racing condition here)? Or is there a better way to achieve
> >> what I want?
> > I'm not 100% positive, but about 98% -- yes, you can count on the fact that
the *.oldbin file will exist on
> > disk before the before_exec block is executed. Eric can confirm this, but
I've never had a problem with it...
> No need to rely on authority, just read the source: 
> https://github.com/defunkt/unicorn/blob/master/lib/unicorn/http_server.rb

Thanks for the pointer. The current source code clearly shows before_exec is
called after the .oldbin file is created. I'd like to know if this is considered
an "invariant" going forward. Could someone in the "authority" help?

Thanks,
Pai-Hung



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  reply	other threads:[~2011-10-10 20:46 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-08  3:20 How to automate the restarting of Unicorn? Pai-Hung Chen
2011-10-09 23:31 ` Alex Sharp
2011-10-10  6:04   ` Devin Ben-Hur
2011-10-10 20:34     ` Pai-Hung Chen [this message]
2011-10-10 21:27       ` Eric Wong
2011-10-10 22:18         ` Pai-Hung Chen

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