mod_shib_24 fails to load after upgrade

Jason Howe jhowe at
Thu Jul 19 20:36:24 EDT 2018

Hi All,

We upgraded all our webservers to SP 3 today.  On 2 out of about 15
machines, httpd failed to restart after the upgrade with the following
httpd: Syntax error on line 96 of /etc/httpd/conf/httpd.conf: Syntax
error on line 13 of /etc/httpd/conf.d/shib.conf: Cannot load
/usr/lib64/shibboleth/ into server:
/usr/lib64/ undefined symbol: deflateInit2_

I've verified that /usr/lib64/ is in place, and
the md5sum matches to that of a working machine.   Running ldconfig
didn't change anything.

I downgraded back to shibboleth-2.6.1-3.1.x86_64
opensaml-schemas-2.6.1-3.1.x86_64 xmltooling-schemas-1.6.4-3.1.x86_64
and things came back up.

These are standard Centos7.5 machines running stock Apache 2.4.  Any
suggestions?  I'm kind of at a loss right now.


Jason Howe
Software Engineer, Web Applications
Paul Allen School for Computer Science & Engineering
University of Washington

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