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From "Chris" <>
Subject [users@httpd] Undefined symbol "apr_thread_mutex_lock"
Date Fri, 11 Nov 2005 20:39:50 GMT

FreeBSD 5.4 running Apache 2.1.8

I have Apache running just fine, but at some point since the time I started the server on
November 3, and now, something has happened which prevents me from doing a 'restart' of the

The log shows it starting okay about a week ago:

[Thu Nov 03 02:26:54 2005] [notice] caught SIGTERM, shutting down
[Thu Nov 03 02:26:58 2005] [notice] Digest: generating secret for digest authentication ...
[Thu Nov 03 02:26:58 2005] [notice] Digest: done
[Thu Nov 03 02:26:58 2005] [notice] Apache/2.1.8 (FreeBSD) DAV/2 mod_ssl/2.1.8 OpenSSL/0.9.8a
configured -- resuming normal operations

Today I decided to restart the server. Much to my surprise, it wouldn't restart:

Performing sanity check on apache21 configuration:
httpd: Syntax error on line 10 of /usr/local/etc/apache21/httpd.conf: Syntax error on line
11 of /usr/local/etc/apache21/modules.conf: Cannot load /usr/local/libexec/apache21/
into server: /usr/local/libexec/apache21/ Undefined symbol "apr_thread_mutex_lock"

I'm assuming the apr stuff has to do with the apr-nothr-db4-1.2.2_1 package that is installed,
and I do remember something about needing to deinstall that before I could compile and install
Apache. It seems like I had to reinstall that apr package AFTER the Apache package was successfully
installed, and I discovered that this workaround was a known issue.

But I'm not sure why I'm now getting an error message that hadn't surfaced when I initially
fired up Apache... I would love to hear any ideas on what went wrong, and/or how to fix this

Yes, it's a beta version of Apache, but this "production" server only serves some non-profit
stuff for the most part, and can withstand some problems and/or downtime.


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