[SPARK-20191][yarn] Crate wrapper for RackResolver so tests can override it. #17508
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…ide it. Current test code tries to override the RackResolver used by setting configuration params, but because YARN libs statically initialize the resolver the first time it's used, that means that those configs don't really take effect during Spark tests. This change adds a wrapper class that easily allows tests to override the behavior of the resolver for the Spark code that uses it.
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Test build #75454 has finished for PR 17508 at commit
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srowen
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Seems OK as a simple dependency injection mechanism though you all will know this code better than I
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Merging to master / 2.1. |
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…ide it. Current test code tries to override the RackResolver used by setting configuration params, but because YARN libs statically initialize the resolver the first time it's used, that means that those configs don't really take effect during Spark tests. This change adds a wrapper class that easily allows tests to override the behavior of the resolver for the Spark code that uses it. Author: Marcelo Vanzin <[email protected]> Closes #17508 from vanzin/SPARK-20191. (cherry picked from commit 0736980) Signed-off-by: Marcelo Vanzin <[email protected]>
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Current test code tries to override the RackResolver used by setting
configuration params, but because YARN libs statically initialize the
resolver the first time it's used, that means that those configs don't
really take effect during Spark tests.
This change adds a wrapper class that easily allows tests to override the
behavior of the resolver for the Spark code that uses it.