GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/18110
[SPARK-20887][CORE] support alternative keys in ConfigBuilder
## What changes were proposed in this pull request?
`ConfigBuilder` builds `ConfigEntry` which can only read value with one
key, if we wanna change the config name but still keep the old one, it's hard
to do.
This PR introduce `ConfigBuilder.withAlternative`, to support reading
config value with alternative keys. And also rename
`spark.scheduler.listenerbus.eventqueue.size` to
`spark.scheduler.listenerbus.eventqueue.capacity` with this feature, according
to https://github.com/apache/spark/pull/14269#discussion_r118432313
## How was this patch tested?
a new test
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark config
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18110.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 #18110
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commit 200ee5416af97bf9f1f007a8ec4c619abe4a1a2f
Author: Wenchen Fan <[email protected]>
Date: 2017-05-25T15:47:37Z
support alternative keys in ConfigBuilder
commit cc51dd09611adb838c1ef15aaffe11d90b0b119c
Author: Wenchen Fan <[email protected]>
Date: 2017-05-25T15:48:46Z
rename a config
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