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https://issues.apache.org/jira/browse/SPARK-11193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14965525#comment-14965525
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Phil Kallos commented on SPARK-11193:
-------------------------------------
Ok, I was able to build Spark 1.5.x using Scala 2.11 (still using Java7
however), and tried to run the KinesisWordCountASL example, but was greeted
with the same error:
{noformat}
15/10/20 11:26:32 WARN TaskSetManager: Lost task 0.0 in stage 30.0 (TID 30,
localhost): java.lang.ClassCastException: scala.collection.mutable.HashMap
cannot be cast to scala.collection.mutable.SynchronizedMap
at
org.apache.spark.streaming.kinesis.KinesisReceiver.onStart(KinesisReceiver.scala:175)
{noformat}
May be worth noting that I saw this warning during compilation:
{noformat}
[warn]
/Users/pkallos/dev/spark/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala:127:
trait SynchronizedMap in package mutable is deprecated: Synchronization via
traits is deprecated as it is inherently unreliable. Consider
java.util.concurrent.ConcurrentHashMap as an alternative.
[warn] with mutable.SynchronizedMap[StreamBlockId, SequenceNumberRanges]
{noformat}
I'm a bit reluctant to switch to Java 8 at this point to test, because I am
actively working on a handful of projects that require Java 7.
Curious if you were able to run this with Java7 + scala2.10/2.11
Thanks for your help on this JB.
> Spark 1.5+ Kinesis Streaming - ClassCastException when starting
> KinesisReceiver
> -------------------------------------------------------------------------------
>
> Key: SPARK-11193
> URL: https://issues.apache.org/jira/browse/SPARK-11193
> Project: Spark
> Issue Type: Bug
> Components: Streaming
> Affects Versions: 1.5.0, 1.5.1
> Reporter: Phil Kallos
> Attachments: screen.png
>
>
> After upgrading from Spark 1.4.x -> 1.5.x, I am now unable to start a Kinesis
> Spark Streaming application, and am being consistently greeted with this
> exception:
> java.lang.ClassCastException: scala.collection.mutable.HashMap cannot be cast
> to scala.collection.mutable.SynchronizedMap
> at
> org.apache.spark.streaming.kinesis.KinesisReceiver.onStart(KinesisReceiver.scala:175)
> at
> org.apache.spark.streaming.receiver.ReceiverSupervisor.startReceiver(ReceiverSupervisor.scala:148)
> at
> org.apache.spark.streaming.receiver.ReceiverSupervisor.start(ReceiverSupervisor.scala:130)
> at
> org.apache.spark.streaming.scheduler.ReceiverTracker$ReceiverTrackerEndpoint$$anonfun$9.apply(ReceiverTracker.scala:542)
> at
> org.apache.spark.streaming.scheduler.ReceiverTracker$ReceiverTrackerEndpoint$$anonfun$9.apply(ReceiverTracker.scala:532)
> at
> org.apache.spark.SparkContext$$anonfun$38.apply(SparkContext.scala:1982)
> at
> org.apache.spark.SparkContext$$anonfun$38.apply(SparkContext.scala:1982)
> at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
> at org.apache.spark.scheduler.Task.run(Task.scala:88)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> Worth noting that I am able to reproduce this issue locally, and also on
> Amazon EMR (using the latest emr-release 4.1.0 which packages Spark 1.5.0).
> Also, I am not able to run the included kinesis-asl example.
> Built locally using:
> git checkout v1.5.1
> mvn -Pyarn -Pkinesis-asl -Phadoop-2.6 -DskipTests clean package
> Example run command:
> bin/run-example streaming.KinesisWordCountASL phibit-test kinesis-connector
> https://kinesis.us-east-1.amazonaws.com
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