Hello everyone, I am having some trouble understanding the shortest path example, and some basic things of Giraph : I am currently using the giraph-0.1-with-dependencies jar, compiled from Maven, and Hadoop 0.20.203.0 When I launch the example, with the exact same input as given in the example, with 1 worker, here is what I have as a result : [0,0,[[1,0]]] [1,0,[[2,100]]] [2,100,[[3,200]]] [3,300,[[4,300]]] [4,600,[[5,400]]] [5,1000,[[6,500]]] [6,1500,[[7,600]]] [7,2100,[[8,700]]] [8,2800,[[9,800]]] [9,3600,[[10,900]]] [10,4500,[[11,1000]]] [11,5500,[[12,1100]]] [12,6600,[[13,1200]]] [13,7800,[[14,1300]]] [14,9100,[[0,1400]]] If I choose a source ID of, for example, 3, I get (still with one worker) : [0,10200,[[1,0]]] [1,10200,[[2,100]]] [2,10300,[[3,200]]] [3,0,[[4,300]]] [4,300,[[5,400]]] [5,700,[[6,500]]] [6,1200,[[7,600]]] [7,1800,[[8,700]]] [8,2500,[[9,800]]] [9,3300,[[10,900]]] [10,4200,[[11,1000]]] [11,5200,[[12,1100]]] [12,6300,[[13,1200]]] [13,7500,[[14,1300]]] [14,8800,[[0,1400]]] I see here that the node 3 has a 0 value on it, and thus I understand that its the starting point. So everything is fine. I tried to add more edges and do the following graph : [1,10,[[2,100]]] [2,10,[[3,100],[1,100]]] [3,10,[[2,100]]] I tried to start the job from node 2, but I didnt get any output, my job gets stuck…what am I doing wrong? I feel like when I add edges, it always gets stuck.Is there a problem in the way I add jobs? Or in my graph? Also I was wondering how to add my own examples : what should I do if I want to add an example class? Can I do something like that : hadoop jar giraph-0.1-jar-with-dependencies.jar myexampleclass And if I do so, where should I place my myexampleclass class? Another newbie question : The shortestpaths example has a main method, but some others don't. I understood that I need to use the GiraphRunner jar, but I don't really know how to use it : two arguments are needed : the number of workers, and the input format, then the other arguments.Can someone tell me how I should do, for example, to run the Shortestpaths example, with the 0.2 version of Giraph (this version does not have a main method)? Last question, why can't I use the bin/giraph command? (and what is this command made for? Is it for running a giraph job jar? or just to run the giraph jar?) whatever I do, it says "can't find the giraph jar"…. Thanks a lot! I hope my questions were not too silly... I hope I was clear enough, forgive my english, I am French :)