Need help : 2way ssl between apigee edge and client

[edu4krishanu]

I have configured as vHost to enable 2way ssl for client. Here is how vHost looks like in edge UI.

When I use the vHost in my proxy and test from SOAP UI I am getting the error,

{"fault": { "faultstring": "Unable to identify proxy for host: secure and url: /mock/v1/new_flights/test", "detail": {"errorcode": "messaging.adaptors.http.flow.ApplicationNotFound"} }}

Sometimes I am getting below error and I think this error is valid as I am not sending client certificate from soap UI although it is pointing to the Port 8443 but vHost port is 7443

Wed Sep 27 16:39:26 EDT 2017:ERROR:Exception in request: org.apache.http.conn.HttpHostConnectException: Connection to https://dvl-apigateway.xxx.com:8443 refused Wed Sep 27 16:39:26 EDT 2017:ERROR:An error occurred [Connection to https://dvl-apigateway.xxx.com:8443 refused], see error log for details 
Wed Sep 27 16:39:26 EDT 2017:INFO:Error getting response for [https://dvl-apigateway.xxx.com.Notifications:Request 1]; org.apache.http.conn.HttpHostConnectException: Connection to https://dvl-apigateway.XXX.com:8443 refused 
Wed Sep 27 16:41:02 EDT 2017:DEBUG:Attempt 1 to execute request Wed Sep 27 16:41:02 EDT 2017:DEBUG:Sending request: POST /mock/v1/new_flights/test HTTP/1.1 Wed Sep 27 16:41:02 EDT 2017:DEBUG:I/O error closing connection javax.net.ssl.SSLException: Connection has been shutdown: javax.net.ssl.SSLException: Received fatal alert: <UNKNOWN ALERT: 107>