Maven developers require a dependency on the http-comet module. The following dependency needs to be added to the pom:

<dependency>
     <groupId>org.glassfish.grizzly</groupId>
     <artifactId>grizzly-comet</artifactId>
     <version>2.2.10</version>
</dependency>

Non-maven developers, additionally to jars, required by HTTP Server framework, require: