[SPARK-17993][SQL] Fix Parquet log output redirection#15538

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Commits on Nov 9, 2016

[SPARK-17993][SQL] Perform Parquet log output redirection when
Michael Allman
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Improve code documentation to clarify the reasoning behind this strategy
Michael Allman
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Set parquet library logging threshold to ERROR for testing
Michael Allman
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Set def ensureParquetLogRedirection(): Unit =
Michael Allman
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Call ParquetFileFormat.ensureParquetLogRedirection when deserializing
Michael Allman
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Call ParquetFileFormat.ensureParquetLogRedirection when deserializing
Michael Allman
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Move Parquet log redirection code to a serializable Java class
Michael Allman
committed