Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/11178#discussion_r55782510
--- Diff:
tools/src/main/scala/org/apache/spark/tools/GenerateMIMAIgnore.scala ---
@@ -105,16 +109,19 @@ object GenerateMIMAIgnore {
/** Scala reflection does not let us see inner function even if they are
upgraded
* to public for some reason. So had to resort to java reflection to
get all inner
- * functions with $$ in there name.
+ * functions with $$ in their name.
*/
- def getInnerFunctions(classSymbol: unv.ClassSymbol): Seq[String] = {
+ def getInnerFunctions(className: String): Seq[String] = {
try {
- Class.forName(classSymbol.fullName, false,
classLoader).getMethods.map(_.getName)
- .filter(_.contains("$$")).map(classSymbol.fullName + "." + _)
--- End diff --
In addition to the reformatting here, I also changed `classSymbol.fullName`
to `className`. The problem is that `classSymbol.fullName` uses underscores
instead of dollar signs when denoting inner classes and had some other
weirdness, so the old name was causing `ClassNotFoundException` when it was
passed to `Class.forName`. This caused the flood of `"Unable to detect inner
functions" warnings in the MiMa logs, e.g.
```
[WARN] Unable to detect inner functions for
class:org.apache.spark.sql.catalyst.parser.SparkSqlParser_FromClauseParser.partitionTableFunctionSource_return
[WARN] Unable to detect inner functions for
class:org.apache.spark.sql.api.r.SQLUtils.RegexContext
[WARN] Unable to detect inner functions for
class:org.apache.spark.sql.catalyst.parser.SparkSqlParser_ExpressionParser.$DFA21
```
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