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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-906) Automatic activation of halted vertices without received messages
Date Thu, 22 May 2014 13:43:02 GMT

    [ https://issues.apache.org/jira/browse/HAMA-906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14005916#comment-14005916
] 

Edward J. Yoon commented on HAMA-906:
-------------------------------------

Great! I'll commit this tomorrow morning.

> Automatic activation of halted vertices without received messages
> -----------------------------------------------------------------
>
>                 Key: HAMA-906
>                 URL: https://issues.apache.org/jira/browse/HAMA-906
>             Project: Hama
>          Issue Type: Bug
>          Components: graph
>    Affects Versions: 0.6.4
>            Reporter: Aguinaldo Pontes
>              Labels: easyfix
>         Attachments: patch.txt
>
>
> When implementing an algorithm on Apache Hama platform, we noticed that when the first
vertex of the split received a message, all the others became activated (being previously
halted), even if they didn't receive a message.
> We think that this happens in the line 254 in GraphJobRunner, in the doSuperstep method
( https://github.com/apache/hama/blob/trunk/graph/src/main/java/org/apache/hama/graph/GraphJobRunner.java#L254).
We think that in this line it misses the following verification: 
> if(currentMessage!=null && ... )
> Could you confirm?
> Thanks.



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