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https://issues.apache.org/jira/browse/FLINK-41308?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Metzger reassigned FLINK-41308:
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Assignee: Purushottam Sinha
> Web dashboard: TaskManager Metrics "Netty Shuffle Buffers" Available/Total
> are always blank
> -------------------------------------------------------------------------------------------
>
> Key: FLINK-41308
> URL: https://issues.apache.org/jira/browse/FLINK-41308
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Web Frontend
> Affects Versions: 2.0.0, 2.1.0, 2.2.0, 2.3.0
> Reporter: Purushottam Sinha
> Assignee: Purushottam Sinha
> Priority: Minor
> Labels: pull-request-available
>
> *Problem*
> Since 2.0.0, the Available and Total cells in the TaskManager Metrics page's
> Netty Shuffle Buffers table are empty. Users can't see shuffle buffer counts
> in the UI.
> *Evidence*
> * {{task-manager-metrics.component.html:258,262}} reads
> {{metrics.memorySegmentsAvailable}} / {{memorySegmentsTotal}}. FLINK-36355
> removed both fields from {{TaskManagerMetricsInfo}}. REST now returns
> {{nettyShuffleMemorySegmentsAvailable}} / {{Used}} / {{Total}} instead.
> * On master with a standalone cluster, {{GET /taskmanagers/<id>}} returns
> 4096/4096 while both UI cells are blank.
> * The tests didn't catch this because the spec mock still uses the old field
> names. FLINK-36355 removed the old fields from {{interfaces/task-manager.ts}}
> but didn't add the new ones.
> *Proposed fix*
> * Read {{nettyShuffleMemorySegmentsAvailable}} /
> {{nettyShuffleMemorySegmentsTotal}} in the template.
> * Add both fields to the {{Metrics}} interface in
> {{interfaces/task-manager.ts}}.
> * Update the spec mock and add a test that checks the rendered counts.
> *Acceptance*
> * The TM Metrics page shows the same Available/Total values as {{GET
> /taskmanagers/<id>}}.
> * The new spec test fails without the template fix and passes with it.
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