Hi @astrava,
2.2.1 is indeed rather old but it’s the last one we tested with. I can’t promise you newer versions will work and considering the important role Sphinx plays in our platform, I wouldn’t recommend risking it. If it fails immediately and in an obvious manner, it’s easy to tell and revert but things may appear to be working well and fail quietly in some dark corner:)
I recommend you try taking the binaries from the latest kaltura-sphinx package as I explained in my last reply and, if it is still crushing, get a coredump so we can inspect the stack trace and gain a better understanding.
I also recommend that you rebuild all your indexes. See https://github.com/kaltura/platform-install-packages/blob/Mercury-13.16.0/RPM/scripts/postinst/kaltura-sphinx-reindex.sh. It may not work out of the box on your ENV but you can discern the required steps from reading it. The $APP_DIR/deployment/base/scripts/populateSphinx*.php scripts exist in your version as well.
Let me know if upgrading worked and if not, please post your BT.
Thanks,