Under load the shuffle sometimes gets incorrect data
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Key: HADOOP-5783
URL: https://issues.apache.org/jira/browse/HADOOP-5783
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Affects Versions: 0.20.0
Reporter: Owen O'Malley
Priority: Blocker
Fix For: 0.20.1
While testing HADOOP-5223 under load, we found reduces receiving completely
incorrect data. It was often random, but sometimes was the output of the wrong
map for the wrong map. It appears to either be a Jetty or JVM bug, but it is
clearly happening on the server side. In the HADOOP-5223 code, I added
information about the map and reduce that were included and we should add
similar protection to 0.20 and trunk.
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