I didn't assign the number of tasks. For the input file containing only few lines I think single BSP task ran.
在 2013-4-29，9:39，"Edward J. Yoon" <[email protected]> 写道： > with single BSP task? > > On Sat, Apr 27, 2013 at 6:18 PM, Lyu Xuedong <[email protected]> wrote: >> Hi all, >> >> I got this exception when ran my job. Then, I ran the PageRank in >> hama-example and found that same data in different order leads to different >> result . I modified the vertex reader of PageRank.java and >> setInputFormat(TextInputFormat.class) to process a text file, while other >> code of PageRank.java remain unchanged . >> >> If the input file : >> >> 3\t2\t1<br/> >> 2\t1<br/> >> 1<br/> >> >> PageRank runs well . >> >> >> If I deleted the last line (which represents a single page "1") : >> >> 3\t2\t1<br/> >> 2\t1<br/> >> >> Job failed and I got the exception "Messages must never be behind the vertex >> in ID! Current Message ID: 1 vs. 2" >> >> What's more, If the input file contains only one line : >> >> 3\t2\t1<br/> >> >> Job failed with the exception "Messages must never be behind the vertex in >> ID! Current Message ID: 1 vs. 3". >> >> But when I exchanged the situations of "3" and "1" : >> >> 1\t2\t3<br/> >> >> It ran well. >> >> What's wrong ? Do I overlook something or It is a bug ? >> >> Regards, >> Lyu. > > > > -- > Best Regards, Edward J. Yoon > @eddieyoon
