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macmnsvc 100% CPU Usage

I have been using my Windows Server 2008 R2 Active Directory Domain Controllers as backup Agent Handlers - since upgrading the AH to release 5.1.2 and MA to 5.0.1, I have a very serious issue in which these systems have macmnsvc running at 100%.

This seems to only affect the Domain Controllers -- Other 5.1.2 AH are fine, and other systems running only MA 5.0.1 are fine as well.

C:\ProgramData\McAfee\Agent\logs\macmnsvc_<SYSTEM> contains:

2015-07-09 09:17:53.577 macmnsvc(1552.1680) http_server.Debug: Http connection(000000000226F6F0) stopping, current state (2)

2015-07-09 09:17:53.577 macmnsvc(1552.1680) http_server.Debug: ma_http_connection_t(000000000226F6F0) ma_uv_write_cb, status(0)

2015-07-09 09:17:53.577 macmnsvc(1552.1680) http_server.Debug: Http connection(000000000226F6F0) stopping, current state (2)

2015-07-09 09:17:53.577 macmnsvc(1552.1680) http_server.Debug: ma_http_connection_t(000000000226F6F0) ma_uv_write_cb, status(0)

2015-07-09 09:17:53.577 macmnsvc(1552.1680) http_server.Debug: Http connection(000000000226F6F0) stopping, current state (2)

2015-07-09 09:17:53.577 macmnsvc(1552.1680) http_server.Debug: ma_http_connection_t(000000000226F6F0) ma_uv_write_cb, status(0)

This repeats until the system is rebooted. After that, things are normal for awhile -- then at some unknown point, the system will go back to 100% utilization. The process cannot be stopped due (I assume) to the McAfee self-protection system.

JustN