You find that a large number of GetCommand 404 OpenFailed: Error (2) while opening the Command file entries are being created in your Symantec Endpoint Protection Manager (SEPM)'s exsecars.log.
These errors may or may not be accompanied by unexpected server errors on your SEPM, with the stack trace showing error com.sygate.scm.server.logreader.ParseException (7): Invalid log record: String found instead of integer.
SECARS is an Apache server plugin that is the broker for communication between SEPM and the Symantec Endpoint Protection (SEP) client. Missing command files in C:\Program Files (x86)\Symantec\Symantec Endpoint Protection Manager\data\outbox\agent\command will lead to a failure to download them on the client and numerous errors in relation to the same on the SEPM.
The issue can be reproduced in the following manner:
There are two possible workarounds: