It is a practice to restart the server post patch application. At times some services are disabled when multiple restarts are required. This issue was a culmination of such a scenario.
There was an unplanned restart of AE server. Post that WCC url did not open. When We have restarted the WCC services , url was working. But after I login to WCC the AE server in configuration tab failed to validate.
When there is a communication issue we need to first verify if the EEM services are running
]# ps -ef | grep igateway
root 5909 1 0 Aug10 ? 01:30:12 ./igateway -b
root 5933 1 0 Aug10 ? 00:26:06 /bin/sh ./WDigateway.sh
Next confirm if server connection is successful in WCC dashboard.
In this case there was a connection failed icon as shown below.
Since there is no change in the configuration and only a restart of the service has happened, We need to verify if the CA connection broker service has been started.
As shown above the service was in disabled state. After enabling the service and starting it the Server was shown validated in the WCC dashboard.