com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes. code example
Example: com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes.
You need to add your package!
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>my.package.name</param-value>
</init-param>