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https://issues.apache.org/jira/browse/HAMA-588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13294863#comment-13294863
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Edward J. Yoon commented on HAMA-588:
-------------------------------------
{quote}
When from a user program voteToHalt is called, the boolean votedToHalt variable
is set true. Now the instance of the vertex class may be on some separate node
and the update will be local. It will need to be propagated back to the master.
{quote}
I don't know what's wrong with this patch. The 'vertex.isHalted()' returns
stale value but, 'vertex.getValue()' returns fresh value?
> Add voteToHalt() mechanism in Graph API
> ---------------------------------------
>
> Key: HAMA-588
> URL: https://issues.apache.org/jira/browse/HAMA-588
> Project: Hama
> Issue Type: Improvement
> Components: graph
> Affects Versions: 0.5.0
> Reporter: Apurv Verma
> Assignee: Apurv Verma
> Fix For: 0.5.0
>
> Attachments: patch.txt
>
>
> Currently Graph API is such that when a vertex doesn't receive any messages,
> compute() is not called upon it.
> One way to change it is let the user decide when the algorithm has to stop.
> For this we need to add a voteToHalt() function with each vertex.
> And maintain a state variable with each vertex. A vertex which has
> votedToHalt() doesn't send messages in the next superstep. However if it
> receives any message, its voteToHalt() ends and it is again eligible to send
> messages.
> When all vertices have votedToHalt() algorithm should end.
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