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Tsz Wo (Nicholas), SZE commented on HADOOP-4605:
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> This might work once we're serious about back-compatibility (1.0?).
By "incompatible changes", I mean code level incompatibility. For examples,
unit tests may call package private methods but these methods may be changed.
Another example: we may rename source files or move files from one package to
another package.
> should run old version of unit tests to check back-compatibility
> ----------------------------------------------------------------
>
> Key: HADOOP-4605
> URL: https://issues.apache.org/jira/browse/HADOOP-4605
> Project: Hadoop Core
> Issue Type: Improvement
> Reporter: Doug Cutting
>
> We should test back-compatibility by running unit tests from a prior release.
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