[NIFI-8272] Deleted/renamed metrics are still being shown in the REST API Prometheus endpoint

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.16.0, 1.15.1
• Labels: REST_API metrics prometheus
• Assignee: Noble Numbat
• Reporter: Noble Numbat
• Created: 01/Mar/21 04:58
• Updated: 13/Dec/21 18:43
• Resolved: 09/Nov/21 01:27

Description

Processors, connections, funnels, etc that have been deleted/renamed from a flow are still being shown in the REST API Prometheus metrics endpoint at their last reported value before they were deleted/renamed.

I checked the PrometheusReportingTask and deleted items are not displayed in the metrics output as I would expect is the correct behaviour.

The bug can be replicated with a flow as simple as a single processor by deleting the processor and observing the metrics still included on subsequent calls to the endpoint.

Issue Links

• links to: GitHub Pull Request #5447