That KB is related to EWS, not MWG. There is not a specific log for DNS problems. You could look in the dashboards to see if the DNS servers were delayed at that time.
I have not seen those messages on a MWG before. Are you using BIND? Do you have an SR open?
yes I know that the article is for another product,
that's why I've opened a discussion in this forum,
I don't have an SR and no BIND used,
pretty sure that DNS was not performing well at that time,
but the proxy should not fail......
DNS is very essential to MWG's ability to handle traffic quickly. If the DNS servers are down, then that is going to degrade it's ability to handle the traffic efficiently.
Were there multiple DNS servers in place, and only one was down/slow? Or are there a number of them specified, and all were down/slow?
we have a primary and a secondary DNS, but are externally managed
the company that handle them told us that at the time of the failure the proxy was starting an abnormal amount of connections to the DNS.