[jira] [Commented] (SPARK-10945) GraphX computes Pagerank with NaN (with some datasets)

["Robin East (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-10945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15156639#comment-15156639 ] 

Robin East commented on SPARK-10945:
------------------------------------

It's not obvious how to reproduce this from the datasets available at the download site. You mentioned that 'dataset format was converted to edge-list, no edge weights at all.'. Can you share the code that converts from the WebGraph format to edge-list? Alternatively can you make the input file available?

> GraphX computes Pagerank with NaN (with some datasets)
> ------------------------------------------------------
>
>                 Key: SPARK-10945
>                 URL: https://issues.apache.org/jira/browse/SPARK-10945
>             Project: Spark
>          Issue Type: Bug
>          Components: GraphX
>    Affects Versions: 1.3.0
>         Environment: Linux
>            Reporter: Khaled Ammar
>              Labels: test
>
> Hi,
> I run GraphX in a medium size standalone Spark 1.3.0 installation. The pagerank typically works fine, except with one dataset (Twitter: http://law.di.unimi.it/webdata/twitter-2010). This is a public dataset that is commonly used in research papers.
> I found that many vertices have an NaN values. This is true, even if the algorithm run for 1 iteration only.  
> Thanks,
> -Khaled



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