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From Michael Armbrust <mich...@databricks.com>
Subject Re: Error in SparkSQL/Scala IDE
Date Wed, 06 May 2015 21:53:53 GMT
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.dragos@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
> ​
>

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