How To Fix symbol lookup error: /usr/sbin/httpd2-prefork: undefined symbol: apr_ldap_ssl_init
Posted by Artem Russakovskii on July 29th, 2008 in Linux
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Apache stopped starting today for no apparent reason.
1 2 3 4 5 6 7 | rcapache2 restart
/usr/sbin/httpd2-prefork: symbol lookup error: /usr/sbin/httpd2-prefork: undefined symbol: apr_ldap_ssl_init
Starting httpd2 (prefork) /usr/sbin/httpd2-prefork: symbol lookup error: /usr/sbin/httpd2-prefork: undefined symbol: apr_ldap_ssl_init
The command line was:
/usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf -DSSL
failed |
So I tried reinstalling libapr and apache2-utils related stuff with no luck. ldconfig didn't help either. It's not until I looked at /usr/lib and relinked a few things that it started working. What the hell, SUSE?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | /usr/lib # l libapr* -rw-r--r-- 1 root root 239306 2007-09-21 23:41 libapr-1.a -rw-r--r-- 1 root root 821 2007-09-21 23:41 libapr-1.la lrwxrwxrwx 1 root root 17 2008-07-30 00:21 libapr-1.so -> libapr-1.so.0.2.9* lrwxrwxrwx 1 root root 18 2008-07-30 00:21 libapr-1.so.0 -> libapr-1.so.0.2.12* -rwxr-xr-x 1 root root 543841 2008-07-29 23:47 libapr-1.so.0.2.12* -rwxr-xr-x 1 root root 148372 2007-09-21 23:41 libapr-1.so.0.2.9* -rw-r--r-- 1 root root 156300 2007-09-23 13:33 libaprutil-1.a -rw-r--r-- 1 root root 912 2007-09-23 13:33 libaprutil-1.la lrwxrwxrwx 1 root root 21 2008-07-30 00:22 libaprutil-1.so -> libaprutil-1.so.0.2.9* lrwxrwxrwx 1 root root 22 2008-07-30 00:21 libaprutil-1.so.0 -> libaprutil-1.so.0.2.12* -rwxr-xr-x 1 root root 291520 2008-07-29 23:47 libaprutil-1.so.0.2.12* -rwxr-xr-x 1 root root 98148 2007-09-23 13:33 libaprutil-1.so.0.2.9* /usr/lib # ln -sf libaprutil-1.so.0.2.9 libaprutil-1.so.0 /usr/lib # ln -sf libapr-1.so.0.2.9 libapr-1.so.0 /usr/lib # l libapr* -rw-r--r-- 1 root root 239306 2007-09-21 23:41 libapr-1.a -rw-r--r-- 1 root root 821 2007-09-21 23:41 libapr-1.la lrwxrwxrwx 1 root root 18 2008-07-30 00:34 libapr-1.so -> libapr-1.so.0.2.9* lrwxrwxrwx 1 root root 18 2008-07-30 00:21 libapr-1.so.0 -> libapr-1.so.0.2.9* -rwxr-xr-x 1 root root 543841 2008-07-29 23:47 libapr-1.so.0.2.12* -rwxr-xr-x 1 root root 148372 2007-09-21 23:41 libapr-1.so.0.2.9* -rw-r--r-- 1 root root 156300 2007-09-23 13:33 libaprutil-1.a -rw-r--r-- 1 root root 912 2007-09-23 13:33 libaprutil-1.la lrwxrwxrwx 1 root root 21 2008-07-30 00:35 libaprutil-1.so -> libaprutil-1.so.0.2.9* lrwxrwxrwx 1 root root 21 2008-07-30 00:35 libaprutil-1.so.0 -> libaprutil-1.so.0.2.9* -rwxr-xr-x 1 root root 291520 2008-07-29 23:47 libaprutil-1.so.0.2.12* -rwxr-xr-x 1 root root 98148 2007-09-23 13:33 libaprutil-1.so.0.2.9* /usr/lib # rcapache2 restart Syntax OK Shutting down httpd2 (waiting for all children to terminate) done Starting httpd2 (prefork) done |
Voila, apache starts now. Grrr, why linker, why??
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Hey, I have the same problem. After I updated to Ubuntu 8.10 apache stopped working! I tried your solution to re-link the files but with no luck! Do you have any other suggestion?
Well, it's hard to say without playing around with that particular system. I'd say double check everything, and if that doesn't work, try to work out another solution. But you already knew that. :-/
The damn problem keeps coming back every once in a while. People, what keeps doing this!?
Based off this post, I was able to poke around and the the following resolved my issues with this on Ubuntu 8.10:
sudo aptitude reinstall libapr1 libaprutil1
Thanks for posting your original findings…it helped point me in the right direction !
I had the same problem in Slackware 12.1 with default installation.
The first link I tried to re-issue was the right one:
ln -sf libaprutil-1.so.0.2.12 libaprutil-1.so.0
Apparently the link is the same as the old, but httpd now runs.
Thank you.
hey i have tried youre approach but it still not working for me
I also ran into this problem, but the root cause was that I'd built the Apache Portable Runtime in /usr/local for some other development work, completely forgot about it, and apache2 was picking up libraries from /usr/local/lib before /usr/lib.
i have still following error when starting apache
/usr/sbin/apache2: symbol lookup error: /usr/sbin/apache2: undefined symbol: apr_os_uuid_get
If this does not help, check by 'ldd' whether your subversion Apache module is compiled with LDAP support enabled. If so, recompile apr-util with –with-ldap.
I was having this problem all day long. I'm using a VPS with ubuntu-8.10-i386-minimal and being a total Linux newbie like me, it was a nightmare to fix it.
I searched in a lot of places but I kept having the same problems. After all, I combined all the commands that I found and it worked
sudo aptitude reinstall libapr1 libaprutil1
sudo a2enmod ldap
cd /usr/lib/
sudo ln -sf libaprutil-1.so.0.2.12 libaprutil-1.so.0
sudo ln -sf libapr-1.so.0.2.12 libapr-1.so.0
sudo /etc/init.d/apache2 stop
sudo /etc/init.d/apache2 start
I hope it works for you!
tried all those things..still doesnt work..can anyone help..its urgent..
I have the same problem and something was wrong with apr version.
ls -l libapr* gives me
libapr-1.a
libapr-1.la
libapr-1.so -> libapr-1.so.0.4.2
libapr-1.so.0 -> libapr-1.so.0.4.2
libapr-1.so.0.3.8
libapr-1.so.0.4.2
libaprutil-1.so.0 -> libaprutil-1.so.0.3.9
libaprutil-1.so.0.3.9
so there is 0.4.2, 0.3.8 and 0.3.9 – Three libapr versions at the same time!
I did sudo ln -sf libapr-1.so.0.3.8 libapr-1.so.0 and it resolves my problem – apache starts now.