问题
In a spark shell or application (written in Scala/maven build), I am unable to use the static builder method from the Apache Commons CLI package. I have confirmed that I am including the jar in the class path and have access to the Option class along with other classes in the package like Options, DefaultParser, etc. Why can I not use this public static method in Scala?
import org.apache.commons.cli.Option
val opt = Option.builder("foo").build()
error: value builder is not a member of object org.apache.commons.cli.Option
I can however see the static fields Option.UNINITIALIZED and Option.UNLIMITED_VALUES
using commons-cli 1.3.1
Scala version: 2.11.8
Spark version: 2.2.0
command to start the shell: spark-shell --jars .m2/repository/commons-cli/commons-cli/1.3.1/commons-cli-1.3.1.jar
回答1:
Let me help you clarify your problem scenario.
You can open your .idea folder, find that it have some internal jar dependencies already, and of the list commons_cli exists, but 1.2 version.
This would lead to class collision.
The solution is straightforward, refer the doc, use the compatible constructor method.
来源：https://stackoverflow.com/questions/47319267/unable-to-use-apache-commons-cli-option-builder-in-scala