How to specify multiple package names for service classes in REST web service using Jersey

You can't specify multiple <param-value> for a single <param-name>.

Use this instead:

<init-param>
    <param-name>jersey.config.server.provider.packages</param-name>
    <param-value>com.pack.first;com.pack.rest.second</param-value>
</init-param>

; and , can be used as a separators.