[jira] [Updated] (GIRAPH-942) RexsterUtils drops some data when it reads data from Titan DB

["Seong-il Lee (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GIRAPH-942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Seong-il Lee updated GIRAPH-942:
--------------------------------

    Attachment: GIRAPH-942.patch

> RexsterUtils drops some data when it reads data from Titan DB
> -------------------------------------------------------------
>
>                 Key: GIRAPH-942
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-942
>             Project: Giraph
>          Issue Type: Bug
>         Environment: - Ubuntu 12.04
> - Hadoop 1.2.1
> - Giraph trunk
> - Titan 0.4.4
>            Reporter: Seong-il Lee
>            Priority: Minor
>         Attachments: GIRAPH-942.patch
>
>
> *Problem:*
> When Giraph reads data from Titan DB via RexsterUtils.
> Giraph can't read whole data from TitanDB.
> *Reason:*
> RexsterUtils split the data to chunk as many as number of map tasks.
> But Giraph use map tasks - 1 workers (one for master), except SplitMasterWorker=false option used.
> So, Giraph drop some data as much as a chunk.
> *Solution:*
> I modified code for RexsterUtils.java
> - before
> chunks : number of map tasks
> - after
> chunks : number of available workers



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