Andy Zhang 956f6e988c [SPARK-29080][CORE][SPARKR] Support R file extension case-insensitively ... ### What changes were proposed in this pull request? Make r file extension check case insensitive for spark-submit. ### Why are the changes needed? spark-submit does not accept `.r` files as R scripts. Some codebases have r files that end with lowercase file extensions. It is inconvenient to use spark-submit with lowercase extension R files. The error is not very clear (https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/deploy/SparkSubmitArguments.scala#L232). ``` $ ./bin/spark-submit examples/src/main/r/dataframe.r Exception in thread "main" org.apache.spark.SparkException: Cannot load main class from JAR file:/Users/dongjoon/APACHE/spark-release/spark-2.4.4-bin-hadoop2.7/examples/src/main/r/dataframe.r ``` ### Does this PR introduce any user-facing change? Yes. spark-submit can now be used to run R scripts with `.r` file extension. ### How was this patch tested? Manual. ``` $ mv examples/src/main/r/dataframe.R examples/src/main/r/dataframe.r $ ./bin/spark-submit examples/src/main/r/dataframe.r ``` Closes #25778 from Loquats/r-case. Authored-by: Andy Zhang <yue.zhang@databricks.com> Signed-off-by: Dongjoon Hyun <dhyun@apple.com>		2019-09-15 00:17:11 -07:00
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src	[SPARK-29080][CORE][SPARKR] Support R file extension case-insensitively	2019-09-15 00:17:11 -07:00
pom.xml	[SPARK-25956] Make Scala 2.12 as default Scala version in Spark 3.0	2018-11-14 16:22:23 -08:00