GitHub user gallenvara opened a pull request:
https://github.com/apache/flink/pull/4649
[FLINK-6116] Watermarks don't work when unioning with same DataStream.
## What is the purpose of the change
In self-union case, the stream edges between the source and target will be
regard as the single one. The `streamOutputMap` in `StreamGraph` will create
only one `RecordWriterOutput` instance.
## Brief change log
- Add edge subId for differentiating streamEdge between the same source
and target node.
## Verifying this change
This change added tests and can be verified as follows:
`testUnion` case in `DataStreamTest`
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (no)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not documented)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gallenvara/flink flink-6116
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4649.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 #4649
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commit 63fd621cfab75673a03b75b205cdd216267958a8
Author: gallenvara <[email protected]>
Date: 2017-09-06T08:24:39Z
add edge subId for StreamEdge.
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