See https://stackoverflow.com/questions/47427901/teiid-generated-swagger-json-file-is-corrupted/47522537
If two swagger VDBs are deployed only one results will be returned for both:
.../vdb1/swagger.json
and
.../vdb2/swagger.json
This seems related to https://github.com/swagger-api/swagger-core/issues/1514 and https://github.com/swagger-api/swagger-core/issues/1691 is reported on the console.