hama-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Lvxuedong <lxd.1...@gmail.com>
Subject Re: Messages must never be behind the vertex in ID ? What does this mean ?
Date Tue, 30 Apr 2013 15:26:48 GMT
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

Mime
View raw message