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From "Jeff Larsen" <lar...@qec.com>
Subject Re: Apache + Tomcat sometimes pegs CPU
Date Fri, 02 Aug 2002 18:34:36 GMT
Thanks, I figured that I wasn't the first one to see
this. Is my current mod_jk going to need upgrading also?

Jeff

----- Original Message -----
From: "Tim Funk" <funkman@joedog.org>
To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
Sent: Friday, August 02, 2002 12:28 PM
Subject: Re: Apache + Tomcat sometimes pegs CPU


> Upgrade to 4.0.4. Earlier (4.0.X) versions have a problems with POST
> requests when the browser terminates before sending enough data.
This
> caused an infinite loop between apache and tomcat.
>
> Here is the simple way to reproduce, (and watch your cpu go way up):
> ------------------------------------
> % telnet webserver 80
> POST /somepage.jsp HTTP/1.1
> Host: webserver:80
> Connection: Close
> Content-Type: application/x-www-form-urlencoded
> Content-Length: 200
> PutStuff here and kill telnet session before 200 chars
> ------------------------------------
>
> -Tim
>
> Jeff Larsen wrote:
> > I forgot to mention... Even when the CPU is pegged,
> > the site functions normally.
> >
> > Jeff
> >
> > ----- Original Message -----
> > From: "Jeff Larsen" <larsen@qec.com>
> > To: "tomcat-user" <tomcat-user@jakarta.apache.org>
> > Sent: Friday, August 02, 2002 12:02 PM
> > Subject: Apache + Tomcat sometimes pegs CPU
> >
> >
> >
> >>I'm running Apache 1.3.23/Tomcat 4.0.3 (jdk1.3.1)
> >>on Solaris 7 connected with mod_jk. Sometimes I
> >>I find that the CPU on the web server box is pegged
> >>at 100%. It's a dedicated server and I am bouncing
> >>Apache and Tomcat once a week to help alleviate the
> >>problem. If I didn't restart every week, it would just
> >>be a matter of time before things spiraled out of
> >>control again.
> >>
> >>The processes that are responsible are java (Tomcat)
> >>and libhttpd.ep (Apache, with --enable-rule=SHARED_CORE)
> >>each with about 50% of the CPU.
> >>
> >>If I bounce Tomcat, no change. If I bounce Apache,
> >>it returns to normal (low) CPU usage. I have Apache
> >>running on other machines without Tomcat and this
> >>does not happen.
> >>
> >>So it's got to be a mod_jk thing. There are no log
> >>messages of any significance. Any ideas on how to
> >>fix it?
> >>
> >>Thanks,
> >>
> >>Jeff
> >>
> >>
> >>
> >>--
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