You configured External Logging in Symantec Endpoint Protection Manager (SEPM) and enabled [Export Logs to a Dump File] then check [Audit Log] in [Log Filter] tab.
Unexpected server error happens every 30 seconds on SEPM and the dump file stops updating.
SEPM 14.3 MP1
This issue is fixed in Symantec Endpoint Protection (SEP) 14.3 RU1. For information on how to obtain the latest build of Symantec Endpoint Protection, see Download the latest version of Symantec software here.
Uncheck [Audit Log] in [Log Filter] tab on [External logging] dialog.