Hello, When I am running the code on a much bigger size graph, I met NullPointerException.
I found that is because the sendMessage() function receive a triplet that edge.srcAttr or edge.dstAttr is null. Thus I wonder why it will happen as I am sure every vertices have a attr. Any returns is appreciated. Alcaid 2015-02-11 19:30 GMT+08:00 James <alcaid1...@gmail.com>: > Hello, > > Recently I am trying to estimate the average distance of a big graph > using spark with the help of [HyperAnf]( > http://dl.acm.org/citation.cfm?id=1963493). > > It works like Connect Componenet algorithm, while the attribute of a > vertex is a HyperLogLog counter that at k-th iteration it estimates the > number of vertices it could reaches less than k hops. > > I have successfully run the code on a graph with 20M vertices. But I still > need help: > > > *I think the code could work more efficiently especially the "Send > message" function, but I am not sure about what will happen if a vertex > receive no message at a iteration.* > > Here is my code: https://github.com/alcaid1801/Erdos > > Any returns is appreciated. >
