I've got an identically configured test server in our dev environment. I've hit the sites on it every which way but actual transactional and yet to replicate the problem! It would be awesome if we had a whole series of scripted tests for our sites (over 60 different webapps), but we don't yet, and I certainly haven't got the time to be able to write such for now, they're not simple applications. Wish I could narrow down the range of apps it might be in!
Paul On 12/9/2010 7:51 PM, Atom Powers wrote: > Can you build another, identical, server and move applications around > until you find the one that's troublesome? > > We have a similar problem with apache, only it actually crashes our > servers. We went through the same process you describe below but we > wenen't able to pin it down until we were able to swap applications > around on many (virtual) servers. > > On Thu, Dec 9, 2010 at 5:04 PM, Paul Graydon<[email protected]> wrote: >> Hi all, >> >> Putting some feelers out for ideas. I've got apache running using >> reverse proxy as a load balancer for over 60 different web applications >> on various servers. Every now and then it'll have a thread that starts >> to spin, seeming to just frantically do nothing, but Apache keeps on >> working hosting content successfully. It happens under both MPM Worker >> and Prefork, and only on the front server, never one of the applications >> behind it. >> >> Isolating the problem is slowly beginning to drive me crazy :) Stracing >> the process doesn't show anything happening at all. Nothing obvious is >> happening in the logs. I tried adding a seconds count for responses to >> see whether anything was routinely slow around the time or leading up to >> it that might provide hints, to no avail, and tried logging the PID, but >> again no joy. As I understand it Apache doesn't log until the response >> has been sent successfully so that's probably not all that surprising. >> >> About the only other thing I can think to do at the moment is enable >> mod_forensics and get it to log requests on receipt as well as at the >> end and look for in requests without a matching out. >> >> Anyone have any suggestions on how else I might track down what is >> causing this? >> >> Paul >> _______________________________________________ >> Tech mailing list >> [email protected] >> https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech >> This list provided by the League of Professional System Administrators >> http://lopsa.org/ >> > > _______________________________________________ Tech mailing list [email protected] https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
