Hello @petruzzo79,
Do you see entitled_kusers_view in /opt/kaltura/app/configurations/sphinx/kaltura.conf?
Assuming that you do, is it possible that you have a defunct searchd [that’s the main Sphinx binary] process that cannot be gracefully killed? That would account for such behaviour.
If that’s the case, I recommend you send SIGKILL to it [kill -9], ensure that it is indeed killed and then run /opt/kaltura/bin/kaltura-sphinx-reindex.sh. That should sort it out.