Could not find worker with name 'ajp13_worker'

As I was following through the tutorial (, even though it has been on Ubuntu 20.04 and Tomcat 9, it did not work.

When finally restart apache2, connection to my SSL secured domain is not working and in /var/log/apache2/mod-jk.log I got the error:

[Wed Mar 24 12:44:32.794 2021] [9160:140230644751424] [error] extension_fix::jk_uri_worker_map.c (580): Could not find worker with name ‘ajp13_worker’ in uri map post processing.

Any help would be greatly appreciated.

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Hi @carlesfranquesa,

This seems like an issue with the configuration files of mod-jk. I’ll suggest you to carefully go over the tutorial again and more precisely that part here:’s-mod_jk

If this doesn’t help, I’ll recommend you to provide us with a little bit more of the mod-jk.log. It should show a little bit more error messages.

Additionally, maybe you can show us your configuration file and your Apache VirtualHOst file for your domain so that we can further check what might have not been configured

Regards, KFSys