Unable to start workers

[jeremiah-RENISAC]

When clicking the "Start a worker" button in the Server Settings & Maintenance -> Workers server page, the message "Worker start signal sent" is displayed but no workers ever start. No failures seem to be recorded in the application log.

Changing the number of worker settings by increasing the environment variable DEFAULT_WORKERS similarly seems to do nothing - the container starts with 1 default worker regardless of value set.

When trying to use the command line tool for restarting workers, the following errors are displayed:

sh-5.1# su -s /bin/bash apache -c '/var/www/MISP/app/Console/worker/start.sh'
Error: Plugin CakeResque could not be found.
#0 /var/www/MISP/app/Lib/cakephp/lib/Cake/Core/App.php(227): CakePlugin::path()
#1 /var/www/MISP/app/Lib/cakephp/lib/Cake/Core/App.php(549): App::path()
#2 [internal function]: App::load()
#3 /var/www/MISP/app/Lib/cakephp/lib/Cake/Console/ShellDispatcher.php(262): class_exists()
#4 /var/www/MISP/app/Lib/cakephp/lib/Cake/Console/ShellDispatcher.php(213): ShellDispatcher->_getShell()
#5 /var/www/MISP/app/Lib/cakephp/lib/Cake/Console/ShellDispatcher.php(66): ShellDispatcher->dispatch()
#6 /var/www/MISP/app/Console/cake.php(19): ShellDispatcher::run()
#7 {main}

[jeremiah-RENISAC]

So, I believe the CakeResque bit is unrelated because of the migration to supervisord workers, but still having trouble with the DEFAULT_WORKERS environment variable not updating the actual number of workers.

https://github.com/MISP/MISP/blob/2.4/docs/background-jobs-migration-guide.md