Apache fails to start: undefined symbol: ap_set_content_type_ex

[Suhitha]

Question: Apache fails to start: undefined symbol: ap_set_content_type_ex

Applicable to:

• Plesk for Linux[

Symptoms

• Apache fails to start with an error like this one:

Code Select Expand

Cannot load /usr/lib/apache2/modules/mod_headers.so into server: /usr/lib/apache2/modules/mod_headers.so: undefined symbol: ap_set_content_type_ex

• LiteSpeed is/was installed on the server

Cause

Incorrect package configuration from LiteSpeed.


Resolution

Reinstall Apache

• Connect to the server over SSH
• Reinstall the Apache components

• RHEL-based

#yum reinstall httpd

• Debian-based

#apt reinstall apache2 apache2-bin apache2-data apache2-utils

3.Start Apache

#systemctl start httpd || systemctl start apache2


Related to

Apache