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https://issues.apache.org/jira/browse/HAMA-588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13294908#comment-13294908
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Apurv Verma commented on HAMA-588:
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I am sorry Edward, I understand what you are trying to do here. The code here
does everything on a single node. Each node just takes care of the vertices it
is incharge of.
So if a vertex halts there is no need to propagate this information back to the
master.
@Edward, your comment made it clear to me.
{quote}
'vertex.getValue()' returns fresh value?
{quote}
Yes this is the fresh value because it is the local value, same is the case
with vertex.isHalted(). I was wrong there, apologies for that.
> 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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