ContestAdmin wrote:

> ContestAdmin wrote:
>
> > Hi all.
> >
> > I recently decided to upgrade my system from using
> > apache jserv to use tomcat.
> >
> > I am running Solaris 2.6.
> > I have apache version 2.0.42
> > tomcat version 4.1.12.
> >
> > I am attempting to get the two to communicate via
> > mod_webapp.
> >
> > Right now they appear to be working, but I am getting
> > a lot of extra information written out to the log files for
> > tomcat.
> >
> > Actually I also see some interesting information in
> > the apache log as well (but I believe I know why this
> > is).
> >
> > >From the apache log:
> > -----
> > [Thu Oct 03 11:16:10 2002] [error] Connection "conn" cannot connect
> > [Thu Oct 03 11:16:10 2002] [error] Cannot open connection "conn"
> > -----
> >
> > I am assuming this is because my script starts
> > apache before tomcat. These errors only show up
> > at the very start of the error_log and cease.
> >
> > The real problem is messages in the tomcat log:
> > -----
> > java.io.IOException: Premature packet header end
> >         at
> > org.apache.catalina.connector.warp.WarpConnection.recv(Unknown Source)
> >         at
> > org.apache.catalina.connector.warp.WarpRequestHandler.handle(Unknown
> > Source)
> >         at org.apache.catalina.connector.warp.WarpConnection.run(Unknown
> > Source)
> >         at java.lang.Thread.run(Thread.java:536)
> > -----
> >
> > I see several of these for every request. I've done
> > some searching in the mailing list and I think this maybe
> > due to serving images but I'm not sure. I also did not
> > find a solution on how to end these.
> >
> > Is it possible this is due to a 'file not found' error?
> >
> > Any help is greatly appreciated.
> >
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>
> More information to make this puzzle even more confusing.
>
> 1) I have an (apparently) identical setup on a second machine that works without
>
> this error. Both machines are the same hardware, OS, jdk, apache, tomcat
> versions.
>
> 2) Also I'm fairly sure this is not a file not found error, because I tested it
> on the
> machine where it is not present and could not get it to duplicate based on the
> file not existing.
>
> I was able to get an identical stack trace by telneting into the
> port for webapp and killing the connection (however).
>
> I've searched over the archived mailing list and seen this issue a few
> times, but never a resolution.
>
> Does it only happen to a very very very few people?
>
> There is probably a very simple explanation that I am missing :-(
>
> Also when the 'Application not currenlty deployed' error page is
> displayed it shows the full path to the webapp.c file in the title
> for the page (definately a feature, but possibly a dangerous one)...
>
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Hmm...

I've noticed that this only generates between 2-3 megs of (extra)
log information per day.

I still have no idea why this is happening, but I guess except for
3-4 other times that I have found this mentioned in the mailing
list archives it hasn't happened (or has had a painfully simple
solution).

My guess is that the socket from the mod_webapp.so -> tomcat
has a timeout of say 1 second and that it hits the timeout closes
and reopens. This would cause the output that I am seeing, but
I'm not *that* good at hacking and don't really want to go into
the code to attempt to figure this out. Also the fact that I only
see it on one of three machines makes me think that this
possibility is highly unlikely.

My other guess is that it is a configuration problem, but I couldn't
begin to figure out what might cause this. Perhaps debug level
needs to be > 0 to avoid the output (that would seem to be
backwards, besides this doesn't look like debugging output).

Is this answered in the FAQ and I missed it, I'd feel fairly bad
then.

-ContestAdmin



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