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Posted to users@httpd.apache.org by Dan Wilga <dw...@MtHolyoke.edu> on 2004/07/22 17:35:17 UTC
[users@httpd] Connection reset by peer errors in 2.0.50
Configuration:
Red Hat Enterprise Linux AS release 3 (Taroon Update 2)
Kernel 2.4.21-15.0.2.ELsmp
mod_perl 1.99_14 (compiled from source; "make test" reports all tests
successful)
OpenSSL 0.9.7a Feb 19 2003
Apache 2.0.50 (compiled from source)
./configure --prefix=/usr --localstatedir=/etc/httpd
--sysconfdir=/etc/httpd/conf --sbindir=/usr/sbin
--libexecdir=/etc/httpd/modules --enable-so --enable-auth-dbm=shared
--enable-rewrite=shared --enable-mime-magic=shared
--enable-ssl=shared --enable-mods-shared=most
CPPFLAGS=-I/usr/kerberos/include
Problem:
Since switching from Apache 2.0.47 to 2.0.49, I have started
receiving occasional messages in the error log of one of my SSL
servers, like this:
[Fri Jul 02 11:14:30 2004] [info] Initial (No.1) HTTPS request
received for child 0 (server [server name]:443)
[Fri Jul 02 11:14:30 2004] [info] (104)Connection reset by peer:
core_output_filter: writing data to the network
[Fri Jul 02 11:14:30 2004] [error] 5894: ModPerl::Registry: Software
caused connection abort at [path to script and line number].\n
[Fri Jul 02 11:14:30 2004] [error] 5894: ModPerl::Registry: Software
caused connection abort at [path to script and line number].\n
This problem has persisted since I went to 2.0.50 recently.
What I've found so far:
- The script/line number recorded in the error log points to the
library of perl functions we use to generate content dynamically. The
script parses each HTML page and does special output. The error
happens when the script tries to write the HTTP header to stdout. The
script is configured to run, like so:
<Files *.mperl>
SetHandler perl-script
PerlResponseHandler ModPerl::Registry
PerlOptions +ParseHeaders
</Files>
AddType application/x-wrapper .shtml .shm
Action application/x-wrapper [path to a .mperl script]
- Interestingly, this error only occurs on the SSL side of our server.
- I have a custom ErrorDocument for 500 errors which captures the
environment variables of the session, and the user in all cases seems
to be using IE 6.0.
- This error only happens about 10-20 times per day. I can reproduce it by:
o Navigating to a page on the site
o Clicking on a link from that page to another one on the site
o Quickly pressing IE's reload button, before the page from the
previous step has a chance to display
I have not received any complaints from users, so I suspect that
the above case (or something similar to it) is the cause on the
client's side.
- We upgraded from Apache 2.0.47, which did not exhibit this problem.
Or, perhaps, the problem was there, but just wasn't getting reported
like it is in .49 and .50.
- After reading up on the error messages, both using Google, and the
Apache FAQ, I have tried these things, to no avail:
SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown
downgrade-1.0 force-response-1.0
EnableSendfile Off
EnableMMAP Off
I tried the latter two, because the web pages in question, while
dynamically generating their output, are stored on an NFS-mounted
partition. I figured it couldn't hurt, but it didn't help either.
If you have ideas about the possible cause of this problem, I can
privately email you an error log of the SSL session produced with
"LogLevel debug". I can also send you the environment variables at
the time of the error.
--
Dan Wilga dwilga@mtholyoke.edu
Web Technology Specialist http://www.mtholyoke.edu
Mount Holyoke College Tel: 413-538-3027
South Hadley, MA 01075 "Who left the cake out in the rain?"
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