Troex Nevelin <[email protected]> wrote:
> Hello,
>
> I have a simillar problem that started after update, 3 days ago we
> moved from REE 1.8 / Rails 2 to Ruby 1.9.3 and Rails 3.1, also we
> replaced memcached with redis so this is huge update and there are
> many places where we can have an issue.
>
> I also have checked my MySQL slow log and there are no requests which
> take more than 5 seconds to complete.
>
> My question is it possible to log the last request (URI) made to the
> worker before killing it on timeout?
There's no way to trap/handle SIGKILL in the worker, and telling the
master every URI the worker makes is too expensive.
This is horrible middleware, but _may_ work if you just forgot a timeout
and Ruby itself isn't blocked (due to a bad C extension):
class LogBeforeTimeout < Struct.new(:app)
def call(env)
thr = Thread.new do
sleep(59) # set this to Unicorn timeout - 1
unless Thread.current[:done]
path = env["PATH_INFO"]
qs = env["QUERY_STRING"] and path = "#{path}?#{qs}"
env["rack.logger"].warn("#{path} about to die from SIGKILL")
end
end
app.call(env)
ensure
thr[:done] = true
thr.run
end
end
Or you can just log the nev before app.call:
def call(env)
path = env["PATH_INFO"]
qs = env["QUERY_STRING"] and path = "#{path}?#{qs}"
env["rack.logger"].debug "START #{path}"
app.call(env)
ensure
env["rack.logger"].debug "FINISH #{path}"
end
And look for START lines without corresponding FINISH lines.
All code in this post is totally untested, so may contain syntax errors
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