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From "Hansen,Chuck" <>
Subject Writing MapFile through Crunch, issue reading through Hadoop
Date Mon, 09 Sep 2013 17:28:06 GMT
With Crunch versions prior to 0.7.x, there does not appear to be an _SUCCESS file written upon
completion, starting with 0.7.x there is.  This file (and any others not intended to be read
through [1]) appears to cause issue with [1].  This means writing a MapFile with crunch and
reading back with [1] works prior to 0.7.x, but starting with 0.7.x, [1] will throw an exception.

Is this a bug with Crunch and/or Hadoop?

[1] org.apache.hadoop.mapreduce.lib.output.MapFileOutputFormat.getReaders

Hadoop CDH versions used:



Chuck Hansen
Software Engineer, Record Dev<> | 816-201-9629
Cerner Corporation |<>

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