[jira] [Created] (SPARK-14767) Codegen "no constructor found" errors with Maps inside case classes in Datasets

["Burak Yavuz (JIRA)" <ji...@apache.org>]

Burak Yavuz created SPARK-14767:
-----------------------------------

             Summary: Codegen "no constructor found" errors with Maps inside case classes in Datasets
                 Key: SPARK-14767
                 URL: https://issues.apache.org/jira/browse/SPARK-14767
             Project: Spark
          Issue Type: Bug
          Components: SQL
            Reporter: Burak Yavuz


When I have a `Map` inside a case class and am trying to use Datasets,
the simplest operation throws an exception, because the generated code is looking for a constructor with `scala.collection.Map` whereas the constructor takes `scala.collection.immutable.Map`.

To reproduce:

{code}
case class Bug(bug: Map[String, String])

val ds = Seq(Bug(Map("name" -> "dummy"))).toDS()

ds.map { b =>
  b.bug.getOrElse("name", null)
}.count()
{code}

Stacktrace:
{code}
Caused by: java.util.concurrent.ExecutionException: java.lang.Exception: failed to compile: org.codehaus.commons.compiler.CompileException: File 'generated.java', Line 163, Column 150: No applicable constructor/method found for actual parameters "scala.collection.Map"; candidates are: Bug(scala.collection.immutable.Map)"
{code}



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