You use Weblogic as your application server. You connect to your instance via CQDE, and then you are disconnected.

Solution

Change the timeout. Navigate your Administration Console to the Servers node and select your server. Then set the value of the property Post Timeout Secs on the HTTP tab to 0.

Additional information

By default, WebLogic closes idle sockets after 30 seconds, which forces CQDE to reconnect.