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From "Thomas Jungblut (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HAMA-613) Scheduler kills job too silently when out of slots
Date Sat, 28 Jul 2012 16:15:33 GMT
Thomas Jungblut created HAMA-613:
------------------------------------

             Summary: 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
            Priority: Blocker
             Fix For: 0.6.0


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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