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From "Costas Stergiou" <cst...@aias.gr>
Subject Re: Apcahe's CPU goes to 100%
Date Fri, 24 May 2002 07:30:30 GMT
I have exactly the same experience on this. Actually, If this
problem is not solved you cannot use tomcat load-balancing features;
thus you cannot setup a real production stable environment!!

ajp12 does not have this problem though (I think because it does
not keep open sockets).
After some minor investigation on the problem, I think that the bug
has to do with an infinite loop that the ajp goes in waiting for some
data from tomcat whereas tomcat has nothing else to send.
I have traced the exact method that this error occurs (a simple while
loop) and I think it shouldn't be that hard for someone that knows
the code to figure out a solution or a work around...but noone has
responded... If someone is interested I can repost my mail where
I even give a stack trace of the runaway process.

Hope someone gives some time into this, it is a pitty having such
a good software such as tomcat and not being able to use it in
critical cases.
Costas



----- Original Message -----
From: "Cammy Ng" <cammy@businetcomm.com>
To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
Sent: Thursday, May 23, 2002 10:22 AM
Subject: Re: Apcahe's CPU goes to 100%


> I like Tomcat a lot personally, however, if I cannot get any solution of
> this problem, I think I need to start testing other commercial software
like
> Jrun, etc. Since they have there own connector, it may solve this problem.
.
> I was spending 2 months and look over the internet everywhere,(all news
> group, all site talking apache, tomcat, mod_jk) and come up with no
> solution. If anyone has solution or answer on this problem Please help and
> post it so that all people can share it..
>
> Thanks
>
> ----- Original Message -----
> From: "Costas Stergiou" <csterg@aias.gr>
> To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
> Sent: Thursday, May 23, 2002 11:56 PM
> Subject: Re: Apcahe's CPU goes to 100%
>
>
> > Many of use have posted this problem here but I see that nobody
> > can come up with an answer...
> >
> > ----- Original Message -----
> > From: "Cammy Ng" <cammy@businetcomm.com>
> > To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
> > Sent: Thursday, May 23, 2002 9:39 AM
> > Subject: Re: Apcahe's CPU goes to 100%
> >
> >
> > > Hi,
> > >
> > > I have this problem too, but no one seems to answer this problem, I
> > believe
> > > it is the mod_jk connector problem. Hope someone will find the
solution
> > for
> > > this.
> > >
> > > Thanks
> > > Cammy
> > > ----- Original Message -----
> > > From: "Rajesh Mishra" <RajeshM@Cal.InterraIT.COM>
> > > To: <tomcat-user@jakarta.apache.org>
> > > Sent: Wednesday, May 22, 2002 9:36 PM
> > > Subject: Apcahe's CPU goes to 100%
> > >
> > >
> > > > I'm using Apache1.3.12 and Tomcat3.2 for my application.After stress
> > > testing
> > > > for 4 hours , CPU utilization of Apache.exe process goes to 100%. As
a
> > > > result when I try to access the website , I'm getting timeouts. But
I
> > > could
> > > > still access the website with tomcat port.
> > > >
> > > > Has anyone experienced this problem .I'm using mod_jk for this
purpose
> > > >
> > > > Regards
> > > > Rajesh
> > > >
> > > > --
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