Graylog 4.2 and message - Notification condition [NO_MASTER] has been fixed

Hello @alessio.dapelo

I did a quick google search for Notification condition [NO_MASTER] has been fixed.. I came across several post on this issue and it seams a couple different methods of resolving it. Please take a look at below and see if they help resolved your issue. If not, please post your full Graylog and elasticsearch log file using the markdown. Thanks

Periodic "Notification condition [NO_MASTER] has been fixed.

https://graylog2.narkive.com/waXhnhYg/how-to-solve-this-alert-notification-condition-no-master-has-been-fixed