shardulm94 opened a new pull request #31623:
URL: https://github.com/apache/spark/pull/31623


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   ### What changes were proposed in this pull request?
   SPARK-33084 added the ability to use ivy coordinates with 
`SparkContext.addJar`. PR #29966 claims to mimic Hive behavior although I found 
a few cases where it doesn't
   
   1) The default value of the transitive parameter is false, both in case of 
parameter not being specified in coordinate or parameter value being invalid. 
The Hive behavior is transitive is [true if not 
specified](https://github.com/apache/hive/blob/cb2ac3dcc6af276c6f64ee00f034f082fe75222b/ql/src/java/org/apache/hadoop/hive/ql/util/DependencyResolver.java#L169)
 in the coordinate and [false for invalid 
values](https://github.com/apache/hive/blob/cb2ac3dcc6af276c6f64ee00f034f082fe75222b/ql/src/java/org/apache/hadoop/hive/ql/util/DependencyResolver.java#L124).
 Also, regardless of Hive, I think a default of true for the transitive 
parameter also matches [ivy's own 
defaults](https://ant.apache.org/ivy/history/2.5.0/ivyfile/dependency.html#_attributes).
   
   2) The parameter value for transitive parameter is regarded as 
case-sensitive [based on the 
understanding](https://github.com/apache/spark/pull/29966#discussion_r547752259)
 that Hive behavior is case-sensitive. However, this is not correct, Hive 
[treats the parameter value 
case-insensitively](https://github.com/apache/hive/blob/cb2ac3dcc6af276c6f64ee00f034f082fe75222b/ql/src/java/org/apache/hadoop/hive/ql/util/DependencyResolver.java#L122).
   
   I propose that we be compatible with Hive for these behaviors
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   ### Why are the changes needed?
   To make `ADD JAR` with ivy coordinates compatible with Hive's transitive 
behavior
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   ### Does this PR introduce _any_ user-facing change?
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   The user-facing changes here are within master as the feature introduced in 
SPARK-33084 has not been released yet
   1. Previously an ivy coordinate without `transitive` parameter specified did 
not resolve transitive dependency, now it does.
   2. Previously an `transitive` parameter value was treated case-sensitively. 
e.g. `transitive=TRUE` would be treated as false as it did not match exactly 
`true`. Now it will be treated case-insensitively.
   
   ### How was this patch tested?
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   Modified existing unit tests to test new behavior
   Add new unit test to cover usage of `exclude` with unspecified `transitive`


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