Have a REST procedure with 3 optional parameters and have the REST:URI set to testget&inA&inB&inC, the Designer Generated War takes the REST:URI of testget&inA&inB&inC and drops the params, so you see in the Swagger UI the operation is just /AAA/testget, so the Request URL is http://localhost:8080/WW/AAA/testget?inA=abc&inC=def but the auto-generated war file doesn't drop the params from the REST:URI and it shows as /AAA/testget&inA&inB&inC so the actual Request URL would be http://localhost:8080/WW_1/AAA/testget&inA&inB&inC?inA=abc&inC=def.