CMK 2.1 - "Activating changes" significantly slower than in all previous releases

[andreas-doehler (Andreas)]

@bitwiz

This message “Cannot lookup IP address of” began to be logged once we’d updated to 2.0 and only concerns hosts that we inject into the site via cmcdump of another site. Our site is indeed unable to resolve any of those hosts, and we wouldn’t expect it to. We expect that Checkmk would not need to worry about that at all, after all it passively consumes the host and service metadata and check results as-is.

This problem i could verify on my instance using cmcdump. It was running 1.6 until last week
I have a quick workaround only usable on my cmcdump only instance. I modified the function “ip_address_of” inside the core_config.py that it returns “0.0.0.0” for every host and makes no lookup.
This is not feasible inside a mixed environment.

I will open a separate topic for this problem as i think that is a real bug.