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rebuildhttpconf error: "undefined symbol: ap_parse_strict_length"

David Ledbetter
  • Updated

Symptoms

When updating Apache, or changing config, the httpd.conf build process ends with an error like this:

httpd: Syntax error in -C/-c directive: Syntax error on line 2 of /etc/apache2/conf.modules.d/275_mod_negotiation.conf: 
Cannot load modules/mod_negotiation.so into server: /etc/apache2/modules/mod_negotiation.so: undefined symbol: ap_parse_strict_length

It may also reference other shared-object (*.so) files, but will end with the same "undefined symbol:" value.

 

Description 

This error has been identified in our internal case EA-9238 and is related to an issue with failed ea-apache24 updates, as explained here: Apache won't start after update to ea-apache24-2.4.46.

 

Workaround

To resolve this error, reinstall ea-apache24 with yum:

yum reinstall ea-apache24

 

This can also occur if the ea-apache24 package is out of date as compared to the other packages. If so, you will receive output like the following.

Installed package ea-apache24-2.4.48-5.15.2.cpanel.x86_64 (from EA4) not available.
Error: Nothing to do

 

If so, update the ea-apache24 like so.

yum update ea-apache24

 

Then verify that the configuration can be rebuilt without further error:

/scripts/rebuildhttpdconf

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