High CPU use by command "yp"


for 2 days now my ucs Server runs slow. Today i did a update to the latest version and a reboot but this didn’t help. Every 7-8 i can see a command “yp” with 80-90% CPU use.

The only thing i changed was to delete one domain from my lets’encrypt app because this domain caused a failure in the renewal process. The new certificate with only one domain is presented correct now.

The logfiles seems to be o.k. but i don’t know what kind of failure i’m searching for. Can you give me a hint?

Kind regards