[bug-notifications] [apache2 0003922]: After upgrade, cannot load libexec/mod_include.so

[Mantis Bug Tracker]

The following issue has been ASSIGNED. 
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http://www.opencsw.org/bugtrack/view.php?id=3922 
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Reported By:                ois_unix
Assigned To:                ihsan
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Project:                    apache2
Issue ID:                   3922
Category:                   upgrade
Reproducibility:            always
Severity:                   crash
Priority:                   normal
Status:                     assigned
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Date Submitted:             2009-09-28 17:59 CEST
Last Modified:              2009-09-28 22:04 CEST
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Summary:                    After upgrade, cannot load libexec/mod_include.so
Description: 
After upgrading to Apache 2.2.13, the Apache service refused to start. The
workaround was to comment out the mod_include module in httpd.conf, but the
real problem seems to involve the module file itself. The full error
message reported was:

"Executing start method ("/var/opt/csw/svc/method/svc-cswapache2 start")
httpd: Syntax error on line 77 of /opt/csw/apache2/etc/httpd.conf: Cannot
load /opt/csw/apache2/libexec/mod_include.so into server: ld.so.1: httpd:
fatal: relocation error: file /opt/csw/apache2/libexec/mod_include.so:
symbol ap_escape_html_2: referenced symbol not found
====================================================================== 

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 (0006765) skayser (administrator) - 2009-09-28 21:33
 http://www.opencsw.org/bugtrack/view.php?id=3922#c6765 
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Thanks for reporting. Do you still see the problem after a "svcadm clear
cswapache2"? I have seen a similar problem during upgrade, but a subsequent
"svcadm clear cswapache2" solved it for me.

See https://bugzilla.redhat.com/show_bug.cgi?id=491567#c3 for a similar
problem description on Fedora. On their platform, the old apache version
was still running and - on reload - tried to load the updated mod_include,
which relied on a function that was only provided by the new apache
version. Seems to me as if we ran into the same issue. 

>From a packaging perspective, it might be best to display a big warning
message on an upgrade between the two affected versions. A forced restart
could sound tempting also, but i wouldn't want to force a restart on a user
(after all apache is still functional while running, the issue only seems
to get triggered on reload).