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