On 10/09/2011 04:31 PM, Alex Sharp wrote:
On Friday, October 7, 2011 at 8:20 PM, Pai-Hung Chen 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
Unicorn::HttpServer#pid=(path) setter writes the pid file (lines 179-206).
before_exec is called on line 439 within a fork block in
Unicorn::HttpServer#reexec (this is the only call to before_exec in the
code)
prior to that, self.pid= is called passing oldpid whose value is
"#{pid}.oldbin" (lines 398-401).
[ line numbers may change if you're not looking at commit c7ba76a21c ]
_______________________________________________
Unicorn mailing list - [email protected]
http://rubyforge.org/mailman/listinfo/mongrel-unicorn
Do not quote signatures (like this one) or top post when replying
