Why does sometime the Application Server connection Test Fails in JDeveloper

Normally if the configuration values are proper the Application Server connection test will give the result as "Success" for every item

But often the same connection gives the Test Results as Failed and we will not be in a position to deploy the composite.

In such situations verify the proxy settings in the JDEV and if proxy is checked, just uncheck it and restart the JDEV. This problem will disappear