Hi, I updated to the latest trunk (after the GIRAPH-11 commit) and wanted to continue to work on GIRAPH-51 where I use a small toy graph to test SimpleShortestPathVertex.
Unfortunately my code did not work anymore and I guess I tracked it down to the fact that vertex that voted to halt are not reacted anymore when new messages arrive. In SimpleShortestPathVertex every vertex always votes to halt and only gets reactivated when a shorter path to it has been found. However my test run always finished after superstep 0. I don't know too much about Giraph's internals yet, but my guess is that the number of sent messages is not tracked correctly anymore. Therefore giraph finishes the algorithm (as all vertices voted to halt) although there should still be messages in the pipeline. I think I tracked it down to this behavior: GraphMapper declares a variable workerSentMessages = 0 and never increases it. This variable is given to BspServiceWorker.finishSuperstep() which writes it to zookeeper and uses it to compute the GlobalStats afterwards, which are used to decide whether a new superstep has to be scheduled. As it has never been increased, the algorithm will always stop when all vertices voted to halt. It would be great if someone could confirm/disprove this speculation and help me to continue work on GIRAPH-51 --sebastian
