Problem: The SNMP Connector doesn't come online and status in the Dashboard showing as "snmp_policy.xml failed schema validation"
Solution: This is due to corrupt snmp policy file, open the .xml file in a browser it would show an exception...
error on line 312 at column 51: xmlParseEntityRef: no name
Correct this in the policy file or comment out the line, then restarting connector services should resolve the problem. Also, we may check \logs\ssa.log for exceptions.