I have docker EMQX 5.3.0 mqtt broker and several python (paho.mqtt) publishers and subscribers.
Several times of day i have massive drop of subscriptions and disconnection of python mqtt clients with error MQTT_ERR_KEEPALIVE.
You can see it in EMQX Cluster overview screenshot:
How can i investigate this problem by EMQX?
I tried to set up rule on event “client_disconnected” and “session_unsubscribed” with console output, but there are now logs for such events near problem timestamps.