Hi, this is my second post after First steps with Apache-Giraph on Apache Giraph. I'll be writing a little bit about how you can use complex types in messages and in the vertex-state. To learn this I wrote a simple hop-count algorithm, you can find the full source code in

I used Apache Giraph during a project for my studies. There is a great official Quick Start-Tutorial on how to set up Giraph on top of Apache Hadoop 0.20.203.0-RC1 and run your first example application. When you follow it, you will have a running environment where you