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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-524) [GSoC 2012] Sparse Matrix-Vector multiplication (SpMV) on Hama
Date Wed, 01 Aug 2012 01:42:34 GMT

    [ https://issues.apache.org/jira/browse/HAMA-524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13426269#comment-13426269
] 

Edward J. Yoon commented on HAMA-524:
-------------------------------------

Looks good but it won't work on fully distributed mode. The reason (or how-to) is well described
in http://wiki.apache.org/hama/DevelopBSP#Configure_variables_from_outside

{code}
attempt_201207311829_0002_000141_0: 12/08/01 01:28:03 ERROR bsp.BSPTask: Error running bsp
setup and bsp function.
attempt_201207311829_0002_000141_0: java.lang.NullPointerException
attempt_201207311829_0002_000141_0:     at org.apache.hama.examples.RandomMatrixGenerator.getSparsity(RandomMatrixGenerator.java:93)
attempt_201207311829_0002_000141_0:     at org.apache.hama.examples.RandomMatrixGenerator$MyGenerator.setup(RandomMatrixGenerator.java:149)
attempt_201207311829_0002_000141_0:     at org.apache.hama.bsp.BSPTask.runBSP(BSPTask.java:165)
attempt_201207311829_0002_000141_0:     at org.apache.hama.bsp.BSPTask.run(BSPTask.java:143)
attempt_201207311829_0002_000141_0:     at org.apache.hama.bsp.GroomServer$BSPPeerChild.main(GroomServer.java:1158)
attempt_201207311829_0002_000141_0: 12/08/01 01:28:03 INFO zookeeper.ZooKeeper: Session: 0x138dfcd2d9e00c4
closed
attempt_201207311829_0002_000141_0: 12/08/01 01:28:03 INFO zookeeper.ClientCnxn: EventThread
shut down
attempt_201207311829_0002_000141_0: 12/08/01 01:28:03 ERROR bsp.BSPTask: Shutting down ping
service.
attempt_201207311829_0002_000141_0: 12/08/01 01:28:03 FATAL bsp.GroomServer: Error running
child
attempt_201207311829_0002_000141_0: java.lang.NullPointerException
attempt_201207311829_0002_000141_0:     at org.apache.hama.examples.RandomMatrixGenerator.getSparsity(RandomMatrixGenerator.java:93)
attempt_201207311829_0002_000141_0:     at org.apache.hama.examples.RandomMatrixGenerator$MyGenerator.setup(RandomMatrixGenerator.java:149)
attempt_201207311829_0002_000141_0:     at org.apache.hama.bsp.BSPTask.runBSP(BSPTask.java:165)
attempt_201207311829_0002_000141_0:     at org.apache.hama.bsp.BSPTask.run(BSPTask.java:143)
attempt_201207311829_0002_000141_0:     at org.apache.hama.bsp.GroomServer$BSPPeerChild.main(GroomServer.java:1158)
attempt_201207311829_0002_000141_0: java.lang.NullPointerException
attempt_201207311829_0002_000141_0:     at org.apache.hama.examples.RandomMatrixGenerator.getSparsity(RandomMatrixGenerator.java:93)
attempt_201207311829_0002_000141_0:     at org.apache.hama.examples.RandomMatrixGenerator$MyGenerator.setup(RandomMatrixGenerator.java:149)
attempt_201207311829_0002_000141_0:     at org.apache.hama.bsp.BSPTask.runBSP(BSPTask.java:165)
attempt_201207311829_0002_000141_0:     at org.apache.hama.bsp.BSPTask.run(BSPTask.java:143)
attempt_201207311829_0002_000141_0:     at org.apache.hama.bsp.GroomServer$BSPPeerChild.main(GroomServer.java:1158)
12/07/31 18:32:07 INFO bsp.BSPJobClient: Job failed.
{code}
                
> [GSoC 2012] Sparse Matrix-Vector multiplication (SpMV) on Hama
> --------------------------------------------------------------
>
>                 Key: HAMA-524
>                 URL: https://issues.apache.org/jira/browse/HAMA-524
>             Project: Hama
>          Issue Type: New Feature
>          Components: bsp core, examples, math
>            Reporter: Edward J. Yoon
>            Assignee: Mikalai Parafeniuk
>              Labels: gsoc, gsoc2012, newbie
>         Attachments: HAMA-524.patch, SpMV_v01.patch, spmv.png
>
>
> Implement Efficient and Fast SpMV algorithm which can be widely used in scientiļ¬c computing,
financial modeling, information retrieval, and others, using Hama Bulk Synchronous Parallel
framework.

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