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.
Workload Automation AE 11.3.6Workload Control center 11.4Windows 2012
When there is a communication issue we need to first verify if the server connection is successful in WCC dashboard.
In this case there was a connection failed icon as shown below.
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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.
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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.
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For more information on WCC configuration please refer the following documentation.