MessageBodyWriter not found for media type application/json when using MOXy

[jerseyrobot]

I'm getting the following error in my logs:

org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor aroundWriteTo
Grave: MessageBodyWriter not found for media type=application/json, type=class com.sample.MyDTO, genericType=class com.sample.MyDTO.

In general, it is caused by the lack of registered MessageBodyWriter but in my case, I do have the jersey-media-proxy JAR on the classpath (with all its dependencies). If that helps debugging, I confirm that the configure method of the MoxyJsonFeature is called when my web application is deployed.

I precise I'm using Jersey v2.21. My web application is deployed on Tomcat 8.0.26.

Also, I tried switching to Jackson and it works fine so I assume something is going wrong with MOXy.

Affected Versions

[2.21]

[jerseyrobot]

@glassfishrobot Commented
Reported by Miko95

[jerseyrobot]

@glassfishrobot Commented
@mpotociar said:
Looks like MOXy entity providers should be registered with lower priority to not interfere with application-specific custom providers.

[jerseyrobot]

@glassfishrobot Commented
This issue was imported from java.net JIRA JERSEY-2963

[jerseyrobot]

• Issue Imported From: https://github.com/jersey/jersey/issues/3235
• Original Issue Raised By:@glassfishrobot
• Original Issue Assigned To: @mpotociar

[saratbhaswanth]

+1

Configured Moxy and started facing issue for Long Object response. Is any fix available?

[saratbhaswanth]

+1

Configured Moxy and started facing issue for Long Object response. Is any fix available?

Issue solved for me when using proper @produces annotation.

In this case, it used to be @produces(MediaType.APPLICATION_JSON). Changing it to @produces(MediaType.TEXT_PLAIN) solved the issue.

Since the output is Long, it is going through BasicTypesMessageProvider writer model which serializes only for "text/plain".

@Produces({"text/plain"})
@Consumes({"text/plain"})
@Singleton
final class BasicTypesMessageProvider extends AbstractMessageReaderWriterProvider<Object> {...}