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Posted to issues@flink.apache.org by "Yuepeng Pan (Jira)" <ji...@apache.org> on 2026/07/16 02:37:00 UTC
[jira] [Commented] (FLINK-40118) Web dashboard: SubTask TimeLine shows "N - undefined" instead of the task endpoint
[ https://issues.apache.org/jira/browse/FLINK-40118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18096648#comment-18096648 ]
Yuepeng Pan commented on FLINK-40118:
-------------------------------------
Merged into master(2.4.0) via: 6027adb70fb3168c3886fe65f133a69e53ce7f70
> Web dashboard: SubTask TimeLine shows "N - undefined" instead of the task endpoint
> ----------------------------------------------------------------------------------
>
> Key: FLINK-40118
> URL: https://issues.apache.org/jira/browse/FLINK-40118
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Web Frontend
> Reporter: Purushottam Sinha
> Priority: Minor
> Labels: pull-request-available
> Fix For: 2.4.0
>
> Attachments: screenshot-1.png
>
>
> Problem
> The job Timeline tab's SubTask view labels each subtask bar 0 - undefined, 1 - undefined, etc. instead of showing the host/endpoint the subtask ran on.
>
> Evidence
> - flink-runtime-web/web-dashboard/src/app/pages/job/timeline/job-timeline.component.ts:135,141 builds the label as `${task.subtask} - ${task.host}`
> - src/app/interfaces/job-timeline.ts:25 still declares the field as host: string, so TypeScript compiles clean while task.host is undefined at runtime
> - Root cause is backend/frontend drift, not a day-one bug: host was valid when the dashboard was built in 2019 (dcd92958c58c). PR apache/flink#23465 (FLINK-33147, 2023-11-09) added endpoint alongside host, deprecating the latter. PR apache/flink#25436 (FLINK-36355, merged 2024-10-01, commit 0b4de216d98 "Remove deprecated host") then deleted host from the REST response entirely — that PR touched only backend Java classes and never updated the Angular frontend, so task.host has read undefined ever since
> - Confirmed still present on current master
>
> Proposed fix
> - job-timeline.ts:25: host: string → endpoint: string
> - job-timeline.component.ts:135,141: ${task.host} → ${task.endpoint}
>
> Acceptance
> - SubTask TimeLine bars for a running job read N - localhost:PORT instead of N - undefined
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