spark-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Pulkit Bhuwalka (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-3274) Spark Streaming Java API reports java.lang.ClassCastException when calling collectAsMap on JavaPairDStream
Date Mon, 29 Sep 2014 07:27:34 GMT

    [ https://issues.apache.org/jira/browse/SPARK-3274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14151447#comment-14151447
] 

Pulkit Bhuwalka commented on SPARK-3274:
----------------------------------------

[~sowen] - you are right. I was making the mistake of reading the sequence file as String
instead of text. Addind toString fixed the problem. Thanks a lot for your help.

> Spark Streaming Java API reports java.lang.ClassCastException when calling collectAsMap
on JavaPairDStream
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-3274
>                 URL: https://issues.apache.org/jira/browse/SPARK-3274
>             Project: Spark
>          Issue Type: Bug
>          Components: Java API
>    Affects Versions: 1.0.2
>            Reporter: Jack Hu
>
> Reproduce code:
> scontext
> 		.socketTextStream("localhost", 18888)
> 		.mapToPair(new PairFunction<String, String, String>(){
> 			public Tuple2<String, String> call(String arg0)
> 					throws Exception {
> 				return new Tuple2<String, String>("1", arg0);
> 			}
> 		})
> 		.foreachRDD(new Function2<JavaPairRDD<String, String>, Time, Void>() {
> 			public Void call(JavaPairRDD<String, String> v1, Time v2) throws Exception {
> 				System.out.println(v2.toString() + ": " + v1.collectAsMap().toString());
> 				return null;
> 			}
> 		});
> Exception:
> java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Lscala.Tupl
> e2;
>         at org.apache.spark.rdd.PairRDDFunctions.collectAsMap(PairRDDFunctions.s
> cala:447)
>         at org.apache.spark.api.java.JavaPairRDD.collectAsMap(JavaPairRDD.scala:
> 464)
>         at tuk.usecase.failedcall.FailedCall$1.call(FailedCall.java:90)
>         at tuk.usecase.failedcall.FailedCall$1.call(FailedCall.java:88)
>         at org.apache.spark.streaming.api.java.JavaDStreamLike$$anonfun$foreachR
> DD$2.apply(JavaDStreamLike.scala:282)
>         at org.apache.spark.streaming.api.java.JavaDStreamLike$$anonfun$foreachR
> DD$2.apply(JavaDStreamLike.scala:282)
>         at org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1.apply$mc
> V$sp(ForEachDStream.scala:41)
>         at org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1.apply(Fo
> rEachDStream.scala:40)
>         at org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1.apply(Fo
> rEachDStream.scala:40)
>         at scala.util.Try$.apply(Try.scala:161)
>         at org.apache.spark.streaming.scheduler.Job.run(Job.scala:32)
>         at org.apache.spark.streaming.scheduler.JobScheduler$JobHandler.run(JobS



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org


Mime
View raw message