Some clients are disconnected from the broker and others remain connected


I’ve been using Mosquitto as a mqtt broker on a linux server for a long time, but lately I’m having a strange problem.

Some clients are disconnecting and/or not receiving messages from topics they subscribe to. I know that the problem is not the TCP/IP network because they are clients using different networks. The strange thing is that other clients using the same broker are still connected and receiving messages from their subscribed topics.

Does anyone have any idea what could be happening? I didn’t find anything similar when searching.

Thank you!

Hi fikerplunk,

Without more information, it is hard to tell.
Have you made any changes to the clients? Or did this just now happen without you changing anything?

What could be an issue is, that you maybe used the same ClientID twice and a client was disconnected because of that.