Dave Beech created MRUNIT-127:
---------------------------------
Summary: Key grouping with GroupingComparators is not consistent
with MapReduce behaviour
Key: MRUNIT-127
URL: https://issues.apache.org/jira/browse/MRUNIT-127
Project: MRUnit
Issue Type: Bug
Affects Versions: 0.9.0
Reporter: Dave Beech
In Hadoop MapReduce, for a set of keys to be properly grouped together by a
grouping comparator into a reduce call, they need to be in a contiguous range
when sorted by the key's ordering comparator.
MRUnit does not impose this requirement, so if the user's grouping and sorting
comparator logic is incorrect, their tests may pass and give the expected
result even though the outcome would be different when run as a true MapReduce
job.
(see below for further explanation)
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
