No idea, never seen this. When dividing by zero an Exception will be thrown. So you either get very small numbers and get NaN somwhere, but no idea where you get infitity or NULL.
2012/10/26 Shuo Wang <[email protected]> > Ok, it maybe my own reason. Can you tell me when it will have the null or > infinity result? > > 2012/10/26 Thomas Jungblut <[email protected]> > > > Works for me: > > > > public static void main(String[] args) throws Exception { > > > args = new String[] {"/tmp/pagerank-in/","/tmp/pagerank-out/"}; > > > HamaConfiguration conf = new HamaConfiguration(); > > > GraphJob createJob = PageRank.createJob(args, conf); > > > > > > createJob.waitForCompletion(true); > > > } > > > > > > > First few lines: > > > > > 506314 1.4833970375127825E-6 > > > 506310 9.504322290942259E-7 > > > 13230 5.222581456439986E-7 > > > 13234 6.976645076083461E-7 > > > 346617 1.156442788400425E-6 > > > 273676 5.770845524447161E-7 > > > > > > > LOG Counters: > > > > > Information: Counters: 9 > > > Okt 26, 2012 9:32:33 AM org.apache.hama.bsp.Counters log > > > Information: org.apache.hama.bsp.JobInProgress$JobCounter > > > Okt 26, 2012 9:32:33 AM org.apache.hama.bsp.Counters log > > > Information: LAUNCHED_TASKS=4 > > > Okt 26, 2012 9:32:33 AM org.apache.hama.bsp.Counters log > > > Information: org.apache.hama.bsp.BSPPeerImpl$PeerCounter > > > Okt 26, 2012 9:32:33 AM org.apache.hama.bsp.Counters log > > > Information: SUPERSTEPS=8 > > > Okt 26, 2012 9:32:33 AM org.apache.hama.bsp.Counters log > > > Information: SUPERSTEP_SUM=36 > > > Okt 26, 2012 9:32:33 AM org.apache.hama.bsp.Counters log > > > Information: IO_BYTES_READ=24644092 > > > Okt 26, 2012 9:32:33 AM org.apache.hama.bsp.Counters log > > > Information: TIME_IN_SYNC_MS=72857 > > > Okt 26, 2012 9:32:33 AM org.apache.hama.bsp.Counters log > > > Information: TOTAL_MESSAGES_SENT=18200056 > > > Okt 26, 2012 9:32:33 AM org.apache.hama.bsp.Counters log > > > Information: TASK_INPUT_RECORDS=700000 > > > Okt 26, 2012 9:32:33 AM org.apache.hama.bsp.Counters log > > > Information: TOTAL_MESSAGES_RECEIVED=9100028 > > > Okt 26, 2012 9:32:33 AM org.apache.hama.bsp.Counters log > > > Information: TASK_OUTPUT_RECORDS=700000 > > > > > > > 2012/10/26 Shuo Wang <[email protected]> > > > > > Ok,I have sent my graph to [email protected] . > > > > > > 2012/10/26 Thomas Jungblut <[email protected]> > > > > > > > Can you please provide the graph? > > > > > > > > 2012/10/26 Shuo Wang <[email protected]> > > > > > > > > > I used the hama-examples-0.6.0-SNAPSHOT.jar in the > > hama-0.6.0-SNAPSHOT. > > > > > > > > > > 2012/10/26 Thomas Jungblut <[email protected]> > > > > > > > > > > > Sure do you divide by 0? > > > > > > Am 26.10.2012 08:37 schrieb "Shuo Wang" < > [email protected] > > >: > > > > > > > > > > > > > Hi, > > > > > > > > > > > > > > I have run pagerank on HAMA. I find that sometimes the > > > > results > > > > > > have > > > > > > > many null and infinity. Can you tell me the reason why it has > > null > > > > and > > > > > > > infinity results? Does it relate with > > > > > > > > > > > > > > the number of the vertices? > > > > > > > > > > > > > > > > > > > > > > > > > > > >
