I tried to upgrade my graylog server from version 3.1 to 3.3 (based on this documention :https://docs.graylog.org/en/3.3/pages/installation/operating_system_packages.html#operating-package-upgrade-rpm-yum-dnf).
after the upgrade I saw there is no logs. and the search is stack .
I tried reboot services (graylog, elastic, and even reboot the vm) but nothing not help.
please help me! tnx !