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From "Thomas Jungblut (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-359) Development of Shortest Path Finding Algorithm
Date Wed, 11 May 2011 05:21:47 GMT

    [ https://issues.apache.org/jira/browse/HAMA-359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13031545#comment-13031545
] 

Thomas Jungblut commented on HAMA-359:
--------------------------------------

Thank you :)
I have an exam tomorrow, I'll try to look at it afterwards. 

Did you looked into the logs? I've added some status outputs, it is possible that the hosts
were just writing the results to disk, this takes a while. From the main method it looks like
the whole job is frozen.

After you've killed it, you have seen that the code was just syncing. 
How much memory did you used per task? I have to allocate about 10gb. Java HashMap's have
a lot of overhead.
Maybe it hang in GC too much, that's what I've seen during profiling too.

> Development of Shortest Path Finding Algorithm
> ----------------------------------------------
>
>                 Key: HAMA-359
>                 URL: https://issues.apache.org/jira/browse/HAMA-359
>             Project: Hama
>          Issue Type: New Feature
>          Components: examples
>    Affects Versions: 0.2.0
>            Reporter: Edward J. Yoon
>            Assignee: Thomas Jungblut
>              Labels: gsoc, gsoc2011, mentor
>             Fix For: 0.3.0
>
>         Attachments: HAMA-359-v2.patch, HAMA-359.patch, eddie.patch
>
>   Original Estimate: 2016h
>  Remaining Estimate: 2016h
>
> The goal of this project is development of parallel algorithm for finding a Shortest
Path using Hama BSP.

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