GitHub user pnowojski opened a pull request:
https://github.com/apache/flink/pull/4928
[FLINK-7732][kafka-consumer] Do not commit to kafka Flink's sentinel offsets
## What is the purpose of the change
This pull request fixes a bug in all versions of `KafkaConsumer`s, that
resulted in application crash, if snapshot before `KafkaConsumer` was able to
asynchronously properly initialize.
## Verifying this change
This change adds additional unit test in `AbstractFetcherTest` and a check
state to ensure/enforce contract that internal sentinel offsets will not be
committed to Kafka.
## 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)
## 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/pnowojski/flink f7732
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4928.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 #4928
----
commit 9baea16ca69c27e5153808ce01592a47091c3131
Author: Piotr Nowojski <[email protected]>
Date: 2017-10-31T14:38:32Z
[FLINK-7732][kafka-consumer] Do not commit to kafka Flink's sentinel offsets
----
---
