GitHub user chengqiangboy opened a pull request:
https://github.com/apache/spark/pull/13255
fix SPARK-15429
Make PIDRateEstimator more suitable to the situation of
`spark.streaming.concurrentJobs > 1`
## What changes were proposed in this pull request?
First, add a new parameter `concurrentJobs` to PIDRateEstimator.
Second, We can change the `error = latestRate - processingRate` to `error =
latestRate - processingRate * concurrentJobs.toDouble`. And change the
`historicalError = schedulingDelay.toDouble * processingRate /
batchIntervalMillis` to `historicalError = schedulingDelay.toDouble *
processingRate * concurrentJobs.toDouble / batchIntervalMillis`.
## How was this patch tested?
Use `PIDRateEstimatorSuite` to test.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/chengqiangboy/spark SPARK-15429
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13255.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #13255
----
commit 661e8ddad43f356a73fa47f00b589b99c8ca9349
Author: cq365423762 <[email protected]>
Date: 2016-05-22T14:35:48Z
Make PIDRateEstimator more suitable to the situation of
`spark.streaming.concurrentJobs > 1`
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