Hi, Hama 0.7.1 and default PageRank example works fine with me. Can you provide more details about your test?
-- Best Regards, Edward J. Yoon -----Original Message----- From: 증퓻 [mailto:edward2...@qq.com] Sent: Wednesday, March 23, 2016 9:25 PM To: dev Subject: HamaV0.7.1 bug Report Got strange problem during the steup funtion for GraphJobRunner.java. 16/03/23 20:22:11 INFO graph.GraphJobRunner: 63083 vertices are loaded into c02b06:61002 16/03/23 20:22:11 INFO graph.GraphJobRunner: Total time spent for loading vertices: 4490 ms 16/03/23 20:22:11 INFO graph.GraphJobRunner: Total time spent for broadcasting global vertex count: 208 ms 16/03/23 20:22:12 INFO graph.GraphJobRunner: Total time spent for initial superstep: 734 ms 16/03/23 20:22:12 INFO graph.GraphJobRunner: Total time spent for broadcasting aggregation values: 109 ms 16/03/23 20:22:13 ERROR bsp.BSPTask: Error running bsp setup and bsp function. java.lang.NullPointerException at org.apache.hama.util.UnsafeByteArrayInputStream.<init>(UnsafeByteArrayInputS tream.java:63) at org.apache.hama.util.WritableUtils.unsafeDeserialize(WritableUtils.java:63) at org.apache.hama.graph.MapVerticesInfo.get(MapVerticesInfo.java:101) at org.apache.hama.graph.GraphJobRunner$ComputeRunnable.<init>(GraphJobRunner.j ava:362) at org.apache.hama.graph.GraphJobRunner.doSuperstep(GraphJobRunner.java:273) at org.apache.hama.graph.GraphJobRunner.bsp(GraphJobRunner.java:185) at org.apache.hama.bsp.BSPTask.runBSP(BSPTask.java:171) at org.apache.hama.bsp.BSPTask.run(BSPTask.java:144) at org.apache.hama.bsp.GroomServer$BSPPeerChild.main(GroomServer.java:1255) Running Pagerank case . serialization running is good, but breaks down with parallel.