In response to recent (partial) outages related to the V2 MQTT APIs, we unfortunately had to set stricter limits on the V2 MQTT APIs.
After we made this change, some community members indicated that the stricter limits were a bit too strict for them, so today we tried to revert those limits. Unfortunately that didn’t go as we hoped, so we decided to relax the limits a little, but still have some.
From now on, and until we shut down V2 at the end of the year, all V2 clusters enforce a limit of 10 MQTT connections per application (no exceptions). Next to this, there is now a limit of 50 MQTT connections per IP address (with exceptions for specific integrations).
We hope that these limits will keep the V2 service as stable as possible until we switch it off in December, but we’ll take additional measures if necessary.