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https://issues.apache.org/jira/browse/SPARK-4276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14224565#comment-14224565
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Tathagata Das commented on SPARK-4276:
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This issue is resolved by this JIRA, the user will get warned clearly if local
or local[1] mode is used.
> Spark streaming requires at least two working thread
> ----------------------------------------------------
>
> Key: SPARK-4276
> URL: https://issues.apache.org/jira/browse/SPARK-4276
> Project: Spark
> Issue Type: Bug
> Components: Streaming
> Affects Versions: 1.1.0
> Reporter: varun sharma
> Fix For: 1.1.0
>
>
> Spark streaming requires at least two working threads.But example in
> spark/examples/src/main/scala/org/apache/spark/examples/streaming/NetworkWordCount.scala
>
> has
> // Create the context with a 1 second batch size
> val sparkConf = new SparkConf().setAppName("NetworkWordCount")
> val ssc = new StreamingContext(sparkConf, Seconds(1))
> which creates only 1 thread.
> It should have atleast 2 threads:
> http://spark.apache.org/docs/latest/streaming-programming-guide.html
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