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[SPARK-23735]Optimize the document by adding an import streaming con… #20857

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7 changes: 7 additions & 0 deletions docs/configuration.md
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Expand Up @@ -2288,6 +2288,13 @@ showDF(properties, numRows = 200, truncate = FALSE)
on the receivers.
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<td><code>spark.streaming.concurrentJobs</code></td>
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The number of concurrent jobs.This parameter directly affects the number of threads in the jobExecutor thread pool.
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@srowen srowen Apr 7, 2018

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I think we don't document this on purpose, as its behavior is hard to understand. This description doesn't really help a caller, anyway.

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@liuxianjiao liuxianjiao Apr 10, 2018

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@srowen I see, but this more or less help us uderstand this configuration. How can we stop eating for fear of choking? To better explain its behavior,maybe we could make this description more specific rather than giving it up.

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### SparkR
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