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https://issues.apache.org/jira/browse/SPARK-15429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-15429.
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Resolution: Won't Fix
> When `spark.streaming.concurrentJobs > 1`, PIDRateEstimator cannot estimate
> the receiving rate accurately.
> ----------------------------------------------------------------------------------------------------------
>
> Key: SPARK-15429
> URL: https://issues.apache.org/jira/browse/SPARK-15429
> Project: Spark
> Issue Type: Bug
> Components: Streaming
> Affects Versions: 1.6.1
> Reporter: Albert Cheng
>
> When `spark.streaming.concurrentJobs > 1`, PIDRateEstimator cannot estimate
> the receiving rate accurately.
> For example, if the batch duration is set to 10 seconds, each rdd in the
> dstream will take 20s to compute. By changing
> `spark.streaming.concurrentJobs=2`, each rdd in the dstream still takes 20s
> to consume the data, which leads to poor estimation of backpressure by
> PIDRateEstimator.
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