Hi Iulian, The relevant code is in ScalaReflection <https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala>, and it would be awesome if you could suggest how to fix this more generally. Specifically, this code is also broken when running from SBT:
$ build/sbt hive/console scala> import implicits._ import implicits._ scala> Seq((1,2)).toDF("a", "b") scala.reflect.internal.MissingRequirementError: class org.apache.spark.sql.catalyst.ScalaReflection in JavaMirror with java.net.URLClassLoader@752d2e33 of type class java.net.URLClassLoader with classpath [file:/root/.sbt/boot/scala-2.10.4/lib/jline.jar,file:/root/.sbt/boot/scala-2.10.4/lib/scala-library.jar,file:/root/.sbt/boot/scala-2.10.4/lib/scala-compiler.jar,file:/root/.sbt/boot/scala-2.10.4/lib/jansi.jar,file:/root/.sbt/boot/scala-2.10.4/lib/scala-reflect.jar] and parent being xsbt.boot.BootFilteredLoader@625e4591 of type class xsbt.boot.BootFilteredLoader with classpath [<unknown>] and parent being sun.misc.Launcher$AppClassLoader@1a8c064 of type class sun.misc.Launcher$AppClassLoader with classpath [file:/root/spark/build/sbt-launch-0.13.7.jar] and parent being sun.misc.Launcher$ExtClassLoader@6deee615 of type class sun.misc.Launcher$ExtClassLoader with classpath [file:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/ext/sunjce_provider.jar,file:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/ext/ nsns.jar,file:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/ext/java-atk-wrapper.jar,file:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/ext/sunpkcs11.jar,file:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/ext/zipfs.jar,file:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/ext/localedata.jar,file:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/ext/icedtea-sound.jar,file:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/ext/libatk-wrapper.so] and parent being primordial classloader with boot classpath [/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/resources.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/rt.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/jsse.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/jce.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/charsets.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/rhino.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/jfr.jar:/usr/lib/jvm/java-7-openjdk-amd64/jre/classes] not found. Michael On Wed, May 6, 2015 at 2:12 AM, Iulian Dragoș <iulian.dra...@typesafe.com> wrote: > Hi, I just saw this question. I posted my solution to this stack overflow > question. > <https://stackoverflow.com/questions/29796928/whats-the-most-efficient-way-to-filter-a-dataframe> > > Scala reflection can take a classloader when creating a mirror ( > universe.runtimeMirror(loader)). I can have a look, but I didn’t find > much about mirrors in spark-sql. > > iulian > >