String, it should be get the following helper function
private[spark] def getKeyClass() = implicitly[ClassTag[K]].runtimeClass
private[spark] def getValueClass() = implicitly[ClassTag[V]].runtimeClass
and this is what I run
scala> val a = sc.textFile("/Users/nanzhu/code/incubator-spark/LICENSE",
2).map(line => ("a", "b"))
scala> a.saveAsNewAPIHadoopFile("/Users/nanzhu/code/output_rdd")
java.lang.InstantiationException
at
sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at java.lang.Class.newInstance(Class.java:374)
at
org.apache.spark.rdd.PairRDDFunctions.saveAsNewAPIHadoopFile(PairRDDFunctions.scala:632)
at
org.apache.spark.rdd.PairRDDFunctions.saveAsNewAPIHadoopFile(PairRDDFunctions.scala:590)
at $iwC$$iwC$$iwC$$iwC.<init>(<console>:15)
at $iwC$$iwC$$iwC.<init>(<console>:20)
at $iwC$$iwC.<init>(<console>:22)
at $iwC.<init>(<console>:24)
at <init>(<console>:26)
at .<init>(<console>:30)
at .<clinit>(<console>)
at .<init>(<console>:7)
at .<clinit>(<console>)
at $print(<console>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.spark.repl.SparkIMain$ReadEvalPrint.call(SparkIMain.scala:774)
at org.apache.spark.repl.SparkIMain$Request.loadAndRun(SparkIMain.scala:1042)
at org.apache.spark.repl.SparkIMain.loadAndRunReq$1(SparkIMain.scala:611)
at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:642)
at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:606)
at org.apache.spark.repl.SparkILoop.reallyInterpret$1(SparkILoop.scala:790)
at org.apache.spark.repl.SparkILoop.interpretStartingWith(SparkILoop.scala:835)
at org.apache.spark.repl.SparkILoop.command(SparkILoop.scala:747)
at org.apache.spark.repl.SparkILoop.processLine$1(SparkILoop.scala:595)
at org.apache.spark.repl.SparkILoop.innerLoop$1(SparkILoop.scala:602)
at org.apache.spark.repl.SparkILoop.loop(SparkILoop.scala:605)
at
org.apache.spark.repl.SparkILoop$$anonfun$process$1.apply$mcZ$sp(SparkILoop.scala:928)
at
org.apache.spark.repl.SparkILoop$$anonfun$process$1.apply(SparkILoop.scala:878)
at
org.apache.spark.repl.SparkILoop$$anonfun$process$1.apply(SparkILoop.scala:878)
at
scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:135)
at org.apache.spark.repl.SparkILoop.process(SparkILoop.scala:878)
at org.apache.spark.repl.SparkILoop.process(SparkILoop.scala:970)
at org.apache.spark.repl.Main$.main(Main.scala:31)
at org.apache.spark.repl.Main.main(Main.scala)
--
Nan Zhu
On Sunday, February 23, 2014 at 11:06 AM, Nick Pentreath wrote:
> Hi
>
> What KeyClass and ValueClass are you trying to save as the keys/values of
> your dataset?
>
>
>
> On Sun, Feb 23, 2014 at 10:48 AM, Nan Zhu <zhunanmcg...@gmail.com
> (mailto:zhunanmcg...@gmail.com)> wrote:
>
> > Hi, all
> >
> > I found the weird thing on saveAsNewAPIHadoopFile in
> > PairRDDFunctions.scala when working on the other issue,
> >
> > saveAsNewAPIHadoopFile throws java.lang.InstantiationException all the time
> >
> > I checked the commit history of the file, it seems that the API exists for
> > a long time, no one else found this? (that's the reason I'm confusing)
> >
> > Best,
> >
> > --
> > Nan Zhu
> >
>
>
>
