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From "Thomas Jungblut (Issue Comment Edited) (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Edited] (HAMA-443) SSSP doesn't works with multi-tasks
Date Wed, 07 Dec 2011 08:30:39 GMT

    [ https://issues.apache.org/jira/browse/HAMA-443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13164237#comment-13164237
] 

Thomas Jungblut edited comment on HAMA-443 at 12/7/11 8:29 AM:
---------------------------------------------------------------

Could you please upload your latest patch?
Oh sorry, it is already there.

Patch overall looks good to me. I dislike the String "updatesMade" and the other String in
the message. Don't you think we can replace this with a sparser type? This could save a lot
of bandwidth. 
Since we just have two states, a boolean could be enough, which is theoretically just one
bit. In Java this will be one byte, wrapped by an integer. Which is less than the string.

What do you think?
                
      was (Author: thomas.jungblut):
    Could you please upload your latest patch?
Oh sorry, it is already there.
                  
> SSSP doesn't works with multi-tasks
> -----------------------------------
>
>                 Key: HAMA-443
>                 URL: https://issues.apache.org/jira/browse/HAMA-443
>             Project: Hama
>          Issue Type: Bug
>          Components: examples
>    Affects Versions: 0.3.0
>            Reporter: Edward J. Yoon
>            Assignee: Edward J. Yoon
>             Fix For: 0.4.0
>
>         Attachments: HAMA-443.patch, HAMA-443_1.patch, HAMA-443_v2.patch, HAMA-443_v3.patch,
HAMA-443_v4.patch, HAMA-443_v5.patch, mapToList.patch, patch.txt, refactor.patch, test.patch
>
>
> {code}
> root@Cnode1:/usr/local/src/hama-trunk# core/bin/hama jar examples/target/hama-examples-0.4.0-incubating-SNAPSHOT.jar
sssp Klewno xx /user/root/edward/sssp-adjacencylist.txt
> Single Source Shortest Path Example:
> <Startvertex name> <optional: output path> <optional: path to own adjacency
list textfile!>
> Setting default start vertex to "Frankfurt"!
> Setting start vertex to Klewno!
> Using new output folder: xx
> 11/09/26 09:46:24 INFO graph.ShortestPaths: Starting data partitioning...
> 11/09/26 09:47:12 INFO graph.ShortestPaths: Finished!
> 11/09/26 09:47:12 INFO bsp.BSPJobClient: Running job: job_201109260929_0004
> 11/09/26 09:47:15 INFO bsp.BSPJobClient: Current supersteps number: 0
> 11/09/26 09:47:21 INFO bsp.BSPJobClient: Current supersteps number: 1
> 11/09/26 09:47:33 INFO bsp.BSPJobClient: The total number of supersteps: 1
> Job Finished in 21.553 seconds
> -------------------- RESULTS --------------------
> java.lang.NullPointerException
>         at org.apache.hama.examples.graph.ShortestPathsBase.printOutput(ShortestPathsBase.java:93)
>         at org.apache.hama.examples.graph.ShortestPaths.main(ShortestPaths.java:239)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
>         at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
>         at org.apache.hama.examples.ExampleDriver.main(ExampleDriver.java:37)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.hama.util.RunJar.main(RunJar.java:145)
> {code}

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