[jira] [Reopened] (SPARK-8412) java#KafkaUtils.createDirectStream Java(Pair)RDDs do not implement HasOffsetRanges

["jweinste (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-8412?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

jweinste reopened SPARK-8412:
-----------------------------

This is improperly implemented or improperly documented. Either way something needs to be corrected.

http://spark.apache.org/docs/latest/streaming-kafka-integration.html

You'll have to scan down to

http://spark.apache.org/docs/latest/streaming-kafka-integration.html
#tab_java_2

directKafkaStream.foreachRDD(
     new Function<JavaPairRDD<String, String>, Void>() {
         @Override
         public Void call(JavaPairRDD<String, Integer> rdd) throws IOException {
             OffsetRange[] offsetRanges = ((HasOffsetRanges)rdd).offsetRanges
             // offsetRanges.length = # of Kafka partitions being consumed
             ...
             return null;
         }
     }
 );


> java#KafkaUtils.createDirectStream Java(Pair)RDDs do not implement HasOffsetRanges
> ----------------------------------------------------------------------------------
>
>                 Key: SPARK-8412
>                 URL: https://issues.apache.org/jira/browse/SPARK-8412
>             Project: Spark
>          Issue Type: Bug
>          Components: Streaming
>    Affects Versions: 1.3.0
>            Reporter: jweinste
>            Priority: Critical
>
>             // Create direct kafka stream with brokers and topics
>             final JavaPairInputDStream<String, String> messages = KafkaUtils.createDirectStream(jssc, String.class, String.class, StringDecoder.class,
>                     StringDecoder.class, kafkaParams, topics);
>             messages.foreachRDD(new Function<JavaPairRDD<String, String>, Void>() {
>                 @Override
>                 public Void call(final JavaPairRDD<String, String> rdd) throws Exception {
>                     if (rdd instanceof HasOffsetRanges) {
>                         //will never happen.



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