[FLINK-39079][Web UI] Add Top N Metrics Dashboard for performance diagnostics #27596
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…gnostics This feature adds a Top N metrics panel to the Job Overview page that displays: - Top N CPU consumers across all subtasks - Top N backpressure operators with highest backpressure ratios - Top N GC intensive tasks with highest GC time percentages This helps users quickly identify performance bottlenecks without needing to manually browse through multiple pages to check individual operator metrics. Backend Changes: - Add TopNMetricsHeaders.java - REST API endpoint definition for /jobs/:jobid/metrics/top-n - Add TopNMetricsParameters.java - API parameter support for get and post requests - Add TopNMetricsResponseBody.java - Response body structure with three metric arrays - Add TopNMetricsHandler.java - Handler that aggregates and returns top N metrics - Register TopNMetricsHandler in WebMonitorEndpoint.java Frontend Changes: - Add top-n-metrics.ts interface - TypeScript interfaces for Top N metrics - Add TopNMetricsService - Service to fetch Top N metrics from backend - Add TopNMetricsComponent - Angular component displaying top N metrics - Integrate TopNMetricsComponent into Job Overview page - Automatically load Top N metrics when job data changes
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What is the purpose of the change
FLINK-39079
This pull request adds a Top N metrics aggregation panel to the Flink Web UI Job Overview page to help users quickly identify performance bottlenecks. Currently, users need to manually navigate through multiple pages to check metrics for each TaskManager, operator, and subtask. The new Top N metrics panel displays Top N CPU Consumers, Top N Backpressure Operators, and Top N GC Intensive Tasks, providing immediate visibility into the most resource-intensive components.
Brief change log
TopNMetricsHeaders.java- REST API endpoint definition for/jobs/:jobid/metrics/top-nTopNMetricsParameters.java- API parameter support for GET requestsTopNMetricsResponseBody.java- Response body structure with three metric arraysTopNMetricsHandler.java- Handler that aggregates and returns top N metrics from all subtasksTopNMetricsHandlerinWebMonitorEndpoint.javatop-n-metrics.ts- TypeScript interfaces for Top N metricsTopNMetricsService.ts- Service to fetch Top N metrics from backendTopNMetricsComponent.ts- Angular component displaying top N metrics with color-coded severityTopNMetricsComponentinto Job Overview pageVerifying this change
This change was manually verified by running a standalone cluster, submitting jobs with backpressure, and verifying the Top N panel displays correct metrics.
Does this pull request potentially affect one of the following parts:
@Public(Evolving): (no)Documentation