There is a known issue with the SMS service that should be fixed in 10.6.3. The solution to this issues until fixed is to do the following process.
stop jettysrv
service rsa-sms stop
service rsa-sms start
start jettysrv
If issue is system is allowed to continue in the failed state for a longer period of time, it may cause a complete failure of the UI, which would require the following process.
stop jettysrv
service rsa-sms stop
service collectd stop
service rabbitmq-server stop
service rabbitmq-server start
service collectd start
service rsa-sms start
start jettysrv
Depending on how many and what type of endpoints you have will determine how long everything will run before the initial symptom of "Cannot connect to Systems Management Server" error occurs. If it is occurring at a regular interval, suggest setting up a cron job to run through the first process on a schedule that will keep things cleared up.
The issue stems from the way the SMS process is handling internal communications, which currently all go over the rabbitmq bus, causing the service to eventually fail.
