Sai Sharath Dandi created FLINK-37238:
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Summary: Flink Web UI does not take scaled parallelism into
account when showing job graph
Key: FLINK-37238
URL: https://issues.apache.org/jira/browse/FLINK-37238
Project: Flink
Issue Type: Bug
Components: Runtime / Web Frontend
Affects Versions: 1.18.1
Reporter: Sai Sharath Dandi
Attachments: Screenshot 2025-01-29 at 4.39.00 PM.png
The Flink Web UI shows an incorrect relationship between job vertices by not
considering scaled parallelism. For example, in the screenshot, we can see a
forward connection between the first 2 vertices. However, it is an implicit
rescale connection as all the task managers running the second vertex are
receiving the data.
I'm guessing the bug happens because both the vertex parallelism are 256
without considering the parallelism overrides which is not being reflected in
the web UI. This can be misleading to users when trying to debug issues with
their job.
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