[GitHub] flink pull request #5492: [FLINK-5728] [kafka] Let FlinkKafkaProducers flush...

[tzulitai]

Github user tzulitai closed the pull request at:

https://github.com/apache/flink/pull/5492


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[GitHub] flink pull request #5492: [FLINK-5728] [kafka] Let FlinkKafkaProducers flush...

[tzulitai]

GitHub user tzulitai opened a pull request:

https://github.com/apache/flink/pull/5492

[FLINK-5728] [kafka] Let FlinkKafkaProducers flush on checkpoints by default

## What is the purpose of the change

This pull request makes flushing on checkpoints in the Kafka producer the 
default behaviour.
Effectively, the user now should not require any additional configuration 
for the producer to have at-least-once semantics.

## Brief change log

- initialize `flushOnCheckpoint` flag to be `true`
- update documents

## Verifying this change

Existing tests should already cover this change.

## Does this pull request potentially affect one of the following parts:

  - Dependencies (does it add or upgrade a dependency): (yes / **no**)
  - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: (yes / **no**)
  - The serializers: (yes / **no** / don't know)
  - The runtime per-record code paths (performance sensitive): (yes / 
**no** / don't know)
  - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes / **no** / don't know)
  - The S3 file system connector: (yes / **no** / don't know)

## Documentation

  - Does this pull request introduce a new feature? (yes / **no**)
  - If yes, how is the feature documented? (not applicable / **docs** / 
JavaDocs / not documented)


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

$ git pull https://github.com/tzulitai/flink FLINK-5728

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

https://github.com/apache/flink/pull/5492.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 #5492


commit fd63de1dfbaeb01dc78254bf6a9e549efcffb7b9
Author: Tzu-Li (Gordon) Tai 
Date:   2018-02-15T08:12:22Z

[FLINK-5728] [kafka] Let FlinkKafkaProducers flush on checkpoints by default




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