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From kayousterhout <>
Subject [GitHub] spark issue #17543: [SPARK-20230] FetchFailedExceptions should invalidate fi...
Date Wed, 05 Apr 2017 20:18:23 GMT
Github user kayousterhout commented on the issue:
    In theory (as you may know), the way this is supposed to work is that, since each reduce
task reads the map outputs in random order, we delay re-scheduling the earlier stage, to try
to collect as many failures as possible (and so you don't need 1 stage failure for each failed
map task).
    But I agree that in general things don't work well when there are lots of fetch failures,
which is what is tracking.  I'm not yet
convinced that this is the most important fix.

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