[Urgent] [Help wanted]JacksonJSONProvider ObjectMapper() class generated through swagger-codegen is not able to deserialize the OffsetDateTime into ISO8601 format.

Description

JacksonJSONProvider ObjectMapper() class generated through swagger-codegen is not able to deserialize the OffsetDateTime into ISO8601 format.

@Provider
@Produces({MediaType.APPLICATION_JSON})
public class JacksonJsonProvider extends JacksonJaxbJsonProvider {

    public JacksonJsonProvider() {

        ObjectMapper objectMapper = new ObjectMapper()
            .disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)
            .disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
            .registerModule(new JavaTimeModule())
//            .findAndRegisterModules()
            .setDateFormat(new RFC3339DateFormat());

        setMapper(objectMapper);
    }
}

Swagger-codegen version

1.5.18

Swagger declaration file content or url

java -jar swagger-codegen-cli.jar generate -i $file -c ${SWAGGER_CONFIG} -DdateLibrary=java8 -l jaxrs -o ${SWAGGER_OUTPUT}

Command line used for generation

swagger-generation-v1.sh

Actual Output

        "offset": {
            "totalSeconds": 0,
            "id": "Z",
            "rules": {
                "transitions": [],
                "transitionRules": [],
                "fixedOffset": true
            }
        },
        "dayOfYear": 312,
        "year": 2006,
        "month": "NOVEMBER",
        "monthValue": 11,
        "dayOfMonth": 8,
        "hour": 15,
        "minute": 57,
        "second": 0,
        "nano": 0,
        "dayOfWeek": "WEDNESDAY"

Expected Output

"2006-11-08T21:27:00.000+0000"

Start with the generated JacksonJsonProvider class and the swagger-generation-v1.sh command using Swagger Codegen 1.5.18 and -DdateLibrary=java8. Reproduce the OffsetDateTime handling with the shown ObjectMapper configuration, then compare the generated JSON with the expected ISO8601 value. Done means the generated provider serializes or deserializes OffsetDateTime in the expected format.