ConnectionState metric not appearing in tenant from March 24th.
EM Cluster had been stopped to add more collectors. Configuration setting below had been disabled. Enabled setting and restarted MOM.
"ConnectionState" is reported by an internal Calculator (AgentConnectivityCalculator).. This calculator (AgentConnectivityCalculator) is disabled by default, need to enable for the metric to work. Set through introscope.apm.calculator.agentconnectivity.enabled.