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From "Eli Reisman (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GIRAPH-246) Periodic worker calls to context.progress() will prevent timeout on some Hadoop clusters during barrier waits
Date Wed, 11 Jul 2012 16:57:34 GMT
Eli Reisman created GIRAPH-246:
----------------------------------

             Summary: Periodic worker calls to context.progress() will prevent timeout on
some Hadoop clusters during barrier waits
                 Key: GIRAPH-246
                 URL: https://issues.apache.org/jira/browse/GIRAPH-246
             Project: Giraph
          Issue Type: Improvement
          Components: bsp
    Affects Versions: 0.2.0
            Reporter: Eli Reisman
            Assignee: Eli Reisman
            Priority: Minor
             Fix For: 0.2.0


This simple change creates a command-line configurable option in GiraphJob to control the
time between calls to context().progress() that allows workers to avoid timeouts during long
data load-ins in which some works complete their input split reads much faster than others,
or finish a super step faster. I found this allowed jobs that were large-scale but with low
memory overhead to complete even when they would previously time out during runs on a Hadoop
cluster. Timeout is still possible when the worker crashes or runs out of memory or has other
GC or RPC trouble that is legitimate, but prevents unintentional crashes when the worker is
actually still healthy.


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