(25881994) IBM WebSphere wraps error responses from JAX-RS REST framework, causing error messages to not be returned to the client.

Workaround: Add the following init-param to the web.xml file for the Jersey Servlet:

<init-param>
<param-name>jersey.config.server.response.setStatusOverSendError
    </param-name>
<param-value>true</param-value>
</init-param>

For additional information on this parameter, refer to the Jersey documentation.

(16568878) Avoid circular references when creating actors in the REST MVC framework.
When you create actors, it is possible to create circular references by using the depends and dependsIfPresent attributes, which causes the actor to malfunction.