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[SPARK-24601] Update Jackson to 2.9.6 #21596

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[SPARK-24601] Update Jackson to 2.9.6 #21596

wants to merge 3 commits into from

Commits on Oct 4, 2018

  1. [SPARK-24601][SQL] Set JSON benchmark baseline 

    So we keep the results in the git commit history and we can do an
easy comparison
    Fokko Driesprong committed Oct 4, 2018
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  2. [SPARK-24601][SQL] Bump Jackson version 

    Jackson is incompatible with upstream versions, therefore bump
the Jackson version to a more recent one.

Behaviour has changed since 2.7.x that None is not considered null
anymore: FasterXML/jackson-module-scala#325

This will only include value that indicates that only properties with
null value, or what is considered empty, are not to be included.
https://fasterxml.github.io/jackson-annotations/javadoc/2.7/com/fasterxml/jackson/annotation/JsonInclude.Include.html

Change the flags to NON_ABSENT
    Fokko Driesprong committed Oct 4, 2018
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  3. [SPARK-24601][SQL] Implement isEmpty on ExecutorMetricsJsonSerializer 

    Since:
scala> None == null
res0: Boolean = false

We need to implement the isEmpty function to verify if the Option[_]
is Empty or not.
    Fokko Driesprong committed Oct 4, 2018
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