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From "Thomas Jungblut (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-613) Scheduler kills job too silently when out of slots
Date Thu, 18 Oct 2012 19:30:03 GMT

    [ https://issues.apache.org/jira/browse/HAMA-613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13479281#comment-13479281
] 

Thomas Jungblut commented on HAMA-613:
--------------------------------------

Looks good to me, can someone else commit this then? Thanks.
                
> Scheduler kills job too silently when out of slots
> --------------------------------------------------
>
>                 Key: HAMA-613
>                 URL: https://issues.apache.org/jira/browse/HAMA-613
>             Project: Hama
>          Issue Type: Bug
>          Components: bsp core
>    Affects Versions: 0.5.0
>            Reporter: Thomas Jungblut
>            Assignee: Yuesheng Hu
>            Priority: Blocker
>             Fix For: 0.6.0
>
>         Attachments: HAMA-613.patch
>
>
> If for example a user submits two text files as input, it will sometimes be split in
4 chunks.
> This usually exceeds the number of tasks that are available in the cluster (if out of
the box installation just have 3 tasks configured).
> Mainly two questions that pop into my mind:
> -Why are two text files split into 4 tasks if the BSPJobClient should check if it exceeds
the number of available task slots?
> -Why does the Client schedules the job if it knows that there are not enough slots available?
> Of course this should yield into a less cryptic error message. Well, actually currently
there is no error messages, constantly confusing users.
> This is a blocker for 0.6.

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