org.jboss.resteasy.core.NoMessageBodyWriterFoundFailure: Could not find MessageBodyWriter for response object of type: <MyClass> of media type: application/json

[nitin.shukla]

Hello,

I have a developed Rest service using RESTEasy framework and it works fine when I am returning XML response from my Rest controller. However I want to switch to JSON response and this is where I get the below error:

org.jboss.resteasy.core.NoMessageBodyWriterFoundFailure: Could not find MessageBodyWriter for response object of type: com.aviseurope.rm.ws.carsintegration.openpricingprogram.domain.OpenPricingProgramResponse of media type: application/json

In my application I initially had following jars:

• resteasy-spring-3.1.4.Final.jar
• resteasy-jaxrs-3.1.4.Final.jar
• resteasy-jaxb-provider-3.1.4.Final.jar

When switching to json format response I have now added below jar:

• resteasy-jackson-provider-3.1.4.Final.jar

Even after adding the resteasy-jacksom-provider jar. I continue to get the same error as mentioned above.

Am I missing anything here to get this to work to return JSON format response instead of XML? In my rest method I have kept below annotation:

@Get

@Produces(MeditaType.APPLICATION_JSON)

@Path("/countriesAndPPs")

public Response getCountryAndPricingProgram(@Context HttpServletRequest request)

{

...

}

Switching back to @Produces(MeditaType.APPLICATION_XML) works fine and I get the xml response as expected. My web application is hosted on JBOSS EAP 7.0.8.GA.

Appreciate any help to resolve the above issue. Thank you.

[nitin.shukla]

Hello,

I further release that on starting the JBoss server I have following warning message.

[org.jboss.modules] Failed to define class org.jboss.resteasy.plugins.providers.jackson.ResteasyJacksonProvider in Module "deployment.pricing.war:main" from Service Module Loader: java.lang.NoClassDefFoundError: Failed to link org/jboss/resteasy/plugins/providers/jackson/ResteasyJacksonProvider (Module "deployment.pricing.war:main" from Service Module Loader): org/codehaus/jackson/jaxrs/JacksonJsonProvider

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

I am not clear if I am missing setting up anything in JBoss module to make use of JSON provider. Any pointers to resolve the issue is appreciated.

Thanks.

[lafr]

From the error message I'd say you also need

<!-- https://mvnrepository.com/artifact/org.codehaus.jackson/jackson-jaxrs -->

<dependency>

    <groupId>org.codehaus.jackson</groupId>

    <artifactId>jackson-jaxrs</artifactId>

    <version>1.9.13</version>

</dependency>

[nitin.shukla]

Thank you Frank. This indeed resolved the issue. Mine is an old Web application and doesn't use Maven, however placing the relevant jackson jars resolved the issue. Thank you.