[GitHub] spark pull request #19919: [SPARK-22727] spark.executor.instances's default ...

[asfgit]

Github user asfgit closed the pull request at:

https://github.com/apache/spark/pull/19919


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[GitHub] spark pull request #19919: [SPARK-22727] spark.executor.instances's default ...

[liu-zhaokun]

GitHub user liu-zhaokun opened a pull request:

https://github.com/apache/spark/pull/19919

[SPARK-22727] spark.executor.instances's default value should be 2


[https://issues.apache.org/jira/browse/SPARK-22727](https://issues.apache.org/jira/browse/SPARK-22727)
## What changes were proposed in this pull request?

when I run a application on yarn,I don't set the value of 
spark.executor.instances,so I think it's default value should as same as the 
running-on-yarn.md said is 2.But the log of driver logs 
"spark.executor.instances less than spark.dynamicAllocation.minExecutors is 
invalid, ignoring its setting, please update your configs.",so I know the 
default value of this configuration isn't 2.So I think we should fix it.

## How was this patch tested?

(Please explain how this patch was tested. E.g. unit tests, integration 
tests, manual tests)
(If this patch involves UI changes, please attach a screenshot; otherwise, 
remove this)

Please review http://spark.apache.org/contributing.html before opening a 
pull request.


You can merge this pull request into a Git repository by running:

$ git pull https://github.com/liu-zhaokun/spark master1207

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/spark/pull/19919.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 #19919


commit 9c3cd44c0cf0501023a8adab262a14f257acf012
Author: liuzhaokun 
Date:   2017-12-07T09:10:29Z

[SPARK-22727] spark.executor.instances's default value should be 2




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