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author | Aaron Davidson <aaron@databricks.com> | 2014-02-20 16:46:13 -0800 |
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committer | Patrick Wendell <pwendell@gmail.com> | 2014-02-20 16:46:13 -0800 |
commit | 3fede4831eeb7d36d4f8fa4aaa02ad0cc8b4b09e (patch) | |
tree | 5cfaa28d5e71ca38533979556e150a476ca885f4 /python | |
parent | 9e63f80e75bb6d9bbe6df268908c3219de6852d9 (diff) | |
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Super minor: Add require for mergeCombiners in combineByKey
We changed the behavior in 0.9.0 from requiring that mergeCombiners be null when mapSideCombine was false to requiring that mergeCombiners *never* be null, for external sorting. This patch adds a require() to make this behavior change explicitly messaged rather than resulting in a NPE.
Author: Aaron Davidson <aaron@databricks.com>
Closes #623 from aarondav/master and squashes the following commits:
520b80c [Aaron Davidson] Super minor: Add require for mergeCombiners in combineByKey
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