Well, in that case, have you verified that your web server is
configured correctly? Is it perhaps set to only allow one process or
connection at a time which would cause your queuing problem?
Typically Apache should be able to handle very many child processes
but often this setting can mistakenly be altered thinking its a load
saving technique.
On 09/02/2011 15:46, Gabriele Genta wrote:
Ok then, following your advice I found a more canonical way of
handling the problem without forcing the framework. To do so I
configured symfony so that a session is not started automatically
and I've also told it to use the ArraySessionStorage in place of
the native one. As a result, now the application never calls the
php functions for session handling (session_*), and no session
file/record is created at all when the backend is invoked.
Nevertheless the problem is still occuring, so at this stage I
think it isn't related to session locks at all.
Thanks,
Gabriele
On mercoledì 9 febbraio 2011 at 14.13, Gareth McCumskey wrote:
With symfony 1 you cannot use session_write_close reliably.
There is a specific symfony function you call on the sfUser
object to actualy have it close properly ;) Thats why I
linked my blog post to help with that info.
On Wed, Feb 9, 2011 at 3:04 PM, Gabriele Genta
<gabriele.ge...@gmail.com> wrote:
Thanks Garreth for your response. As I pointed out in my
original post, though, I already tried the fixes
regarding session files locking by calling
session_write_close() and also by discarding session
saving at all, by doing something like this:
function foo() {}
session_set_save_handler("foo", "foo", "foo", "foo",
"foo", "foo");
Anyway, none of them worked, there's still something
preventing the requests from running.
Thanks anyway,
Gabriele
On mercoledì 9 febbraio 2011 at 12.10, Gareth McCumskey
wrote:
The problem is session write locking. We had the same
issue in symfony 1. I don't know how to do this for
symfony 2 but I wrote a blog post to deal with it in
symfony 1. Perhaps you can just convert this for use
with symfony 2:
http://garethmccumskey.blogspot.com/2009/10/php-session-write-locking-and-how-to.html
On Wed, Feb 9, 2011 at 1:07 PM, Gabriele Genta
<gabriele.ge...@gmail.com> wrote:
Hello,
I'm trying to implement long polling in a Synfony
2 project to shorten response times in a
"real-time" application I'm making. Essentially I
have an ajax front end that requests data to the
symfony-driven backend through XHR. My problem
arises when I try to send a second request to the
backend while a first one is on hang for long
polling; the second request just get queued after
the first, and doesn't get processed until the
first returns.
I've googled a bit about the problem and found
out that it could depend on session files being
locked (see here:
http://stackoverflow.com/questions/1430883/simultaneous-requests-to-php-script)
during requests, but getting rid of session files
didn't help (my backend is completely stateless,
so it doesn't need sessions at all actually).
Has anyone come across this problems before? I
think the problem might have to do with symfony
and caching (setting locks on cache files during
requests, maybe?), but I don't know enough of the
guts of symfony itself to find a solution or a
workaround..
Thanks a lot!
Gabriele Genta
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