First, boomi doesn't provide a bug report mechanism for end user. This is not convinient.
Here is the bug.
-A web service client with endpoint string assume its webserviceendpointstring1.
-I delete endpoint string, keep it empty.
-I configure the process which use this connector endpoint as envirnment extension.
-deploy the process.
-Config the environment extension, in the endpoint of web service client. I uncheck the use default and left it empty.
I expect the process will report error due to the empty endpoint. But I found it went to webserviceendpointstring1. This is totally wrong.