Thomas Jungblut created HAMA-613:
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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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