[jira] [Created] (SPARK-8815) illegal java package names in jar

["Sam Halliday (JIRA)" <ji...@apache.org>]

Sam Halliday created SPARK-8815:
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             Summary: illegal java package names in jar
                 Key: SPARK-8815
                 URL: https://issues.apache.org/jira/browse/SPARK-8815
             Project: Spark
          Issue Type: Bug
            Reporter: Sam Halliday


In ENSIME we were unable to index the spark jars and we investigated further... you have classes that look like this:

org.spark-project.guava.annotations.VisibleForTesting

Hyphens are not legal package names according to the java language spec, so I'm amazed that this can actually be read at runtime... certainly no compiler I know would allow it.

What I suspect is happening is that you're using a build plugin that internalises some of your dependencies and it is using your groupId but not validating it... and then blindly using that name in the ASM manipulation.

You might want to report this upstream with your build plugin.

For your next release, I recommend using an explicit name that is not your groupId. i.e. convert hyphens to underscores as Gosling recommends.




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