Hi Raspoutitsa,
Many times the simplest things can be the hardest things, the issue here is, we don't really see what health. So I don't know what is sending you the information.
I guess you don't see anything under the tasks? But as I was saying the simpliest things can be hard, but try to reboot the host who is sending you those errors.
Did you already do that?
Please let me know.
Best regards,
Marco
Check my blog, and if my answere resolved the issue, please provide a feedback.
Marco Frias - VMware is my World
www.vmtn.blog