Active monitoring logs randomly clearing after CU5

Question

After performing the Exchange 2013 update to CU5, we have been noticing that some of the active monitoring logs are randomly clearing. Specifically the Throttling Config, Responder Definition, Monitor Definition, Probe Definition, and Maintenance
Definition logs. The only correlation I can find is in the Startup Notification logs I see an event every time the logs are cleared starting the Local endpoint manager. I looked back prior to CU5 and this event occurred infrequently, and accompanied by a handful
of other startup events, now it seems to be running by itself intermittently. It isn't happening at any consistent time or date range. Sometimes we will have 2 in one day, other times it will wait 2 or 3 days to clear. Default behavior even if the log
is full would be to overwrite old logs rather than perform a log clear, but I'm looking at the log and even after a full days worth there's barely 100 events in any given log. I reviewed the logs and there's no indication of trouble, no
errors or warnings. Is anyone else seeing this behavior on exchange?

Answer 1

Hi Theantioch,
From the release notification of Exchange Server 2013 CU5, CU5 includes a Managed Availability probe configuration that is frequently restarting the Microsoft Exchange Shared Cache Service in some environments. The service is being added to provide
future performance improvements and is not used in Cumulative Update 5. More information is available in
KB2971467. As of Exchange Server 2013 Cumulative Update 5, this notice and the frequent restarts of the managed availability process are
considered not to be a concern. Our issue could be related to the frequent restart. And we can safely ignore the problem. Thanks for your understanding.
Regards, Eric Zou