GitHub user zentol opened a pull request:
https://github.com/apache/flink/pull/5378
[FLINK-8489][ES] Prevent side-effects when modifying user-config
## What is the purpose of the change
The `ElasticsearchSinkBase` constructor was removing entries from a
user-provided collection. We now copy the collection to prevent side-effects.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zentol/flink 8489
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/5378.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 #5378
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commit 3b81b7d3b0f3ae3405f7bc4e5f438af87aa45630
Author: zentol <chesnay@...>
Date: 2018-01-29T10:46:08Z
[FLINK-8489][ES] Prevent side-effects when modifying user-config
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