GitHub user fhueske opened a pull request:
https://github.com/apache/incubator-flink/pull/109
[FLINK-1073] Enables sorted group input for GroupReduce combiners
`GroupReduceCombineDriver` and `SynchronousChainedCombineDriver` use
separate comparators for sorting and grouping.
Enabling multiple comparators for a single input of a driver required some
refactoring.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/fhueske/incubator-flink fixSortedGroupCombiner
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-flink/pull/109.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #109
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commit d547a27720409584543b0caa4a7a686a82f2a903
Author: Fabian Hueske <[email protected]>
Date: 2014-09-01T22:08:43Z
[FLINK-1073] Added test case to reproduce error
commit 190c146ff65a0a09ebe1ca03d32a701159bb2080
Author: Fabian Hueske <[email protected]>
Date: 2014-09-02T13:51:44Z
[FLINK-1073] Enables sorted group input for GroupReduce combiners.
- GroupReduceCombineDriver uses separate comparators for sorting and
grouping.
- Adding support for multiple comparators for a single input driver
required some refactoring.
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