If you are using Hector in your project and are getting a ClassNotFound exception for an SLF4J class, there is a reason for it. You must include the correct SLF4J binding in your project. Hector's only SLF4J dependency is on the API itself, not the logging implementations. For us (or any library developer for that matter) to make assumptions about which logging library you are using is poor form.
Thanks to Stephen Connolly for getting are pom files straightened out to support this.