Spark Exception toDF

val sqlContext = new SQLContext(sc)
import sqlContext.implicits._
val df = rdd.toDF()

Throws exception (below).

Solution

It seems that some of the classes are not included when running “sbt package” and then invoking spark with “spark-submit”.  This could be confirmed by running program with “sbt run” does work (although sbt run does have many other problems; so spark-submit should be used were possible).

To solve this problem you can use sbt-assembly to create a fat/uber jar.

 

Exception in thread "main" java.lang.NoSuchMethodError: scala.reflect.api.JavaUniverse.runtimeMirror(Ljava/lang/ClassLoader;)Lscala/reflect/api/JavaUniverse$JavaMirror;
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:497)
 at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:672)
 at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:180)
 at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:205)
 at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:120)
 at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)

 

 

About Neil Rubens

see http://ActiveIntelligence.org

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