On Tue, 25 May 2010 18:49:16 -0500, "Horacio H." <pokehorace@xxxxxxxxx> wrote: > Hi ! > > I was wondering if someone else has noticed a similar behavior: > > I wrote an URL-rewrite script with PHP as explained at > <http://wiki.squid-cache.org/ConfigExamples/PhpRedirectors>. The > script was running without complains under Squid 2.7.Stable9 and > Ubuntu 9.04, then I upgraded Ubuntu to 10.04 and warning messages > started to show up: > > 2010/05/15 16:48:28| WARNING: url_rewriter #XX (FD XX) exited <---- > (repeat n-times) > 2010/05/15 16:48:28| Too few url_rewriter processes are running > 2010/05/15 16:48:28| Starting new helpers > > Things I've tried to solve the issue without success: > > - Simplified the PHP script to the minimum (finally just using the > wiki's example). > - A clean installation of Ubuntu 10.04. > - Downgraded PHP package from 5.3 to 5.2. > - Recompiled Squid (just in case). > > Perl scripts are not afected, so I rewrited/transalted the script. The > service is up again but a big question mark was left over my head. > > I know it's not a Squid's issue per se, but at least the wiki may need > to be updated before other people get stuck at this point... Hi Horacio, Being a great PHP fan myself with a lot of helpers I've been fighting this problem for a year or so now. The issue centers around the automatic run timeouts PHP has. Under several of the 5.0-5.2 releases the background engine has either not obeyed the php.ini settings correctly or not obeyed run-time overrides correctly. I pushed through and supported many alterations to Squid-3.2 which help minimize the problem, but... As far as I can tell so far the new 5.3 engine seems not to obey either run-time or configured settings and sticks rigidly to a 60sec timeout. While technically helpers can be of any language, this recent behaviour change of PHP 5.3 makes it completely useless as a Squid helper for even small installations. I'd advise some other scripting language for now, or if you must the very latest squid-3.x code (http://www.squid-cache.org/Versions/v3/HEAD/) will be important to prevent Squid constantly restarting as its helpers self-destruct. Even then the constantly unavailable helpers make Squid a bit slow and hang on many requests while they are restarted. Amos
