[FLINK-25068] Show the maximum parallelism (number of key groups) of a job in Web UI

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.14.0
• Fix Version/s: 1.18.0
• Component/s: Runtime / Web Frontend
• Labels: pull-request-available stale-assigned
• Assignee: zlzhang0122
• Reporter: zlzhang0122
• Created: 26/Nov/21 07:17
• Updated: 11/Mar/24 16:29
• Resolved: 11/Mar/24 16:29

Description

Now, Flink use maximum parallelism as the number of key groups to distribute the key, the maximum parallelism can be set manually, or flink will set-up automatically, sometimes the value is useful and we may want to know it, maybe we can expose in the Web UI.

By doing this, we can easily know the max parallelism we can suggest the user to scale when they are facing the leak of through-output, and we can know which subtask will processing the special value and we can find the log soon.

Issue Links

• duplicates: FLINK-32000 Expose vertex max parallelism in the WebUI
• links to: GitHub Pull Request #18523