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" <edwardyoon@apache.org> 写道：
> with single BSP task?
>
> On Sat, Apr 27, 2013 at 6:18 PM, Lyu Xuedong <lxd.1990@gmail.com> 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
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