fix(metrics): migrated from deprecated Node.js APIs to activeResources metric

[kirrg001]

Changes:

• https://nodejs.org/api/deprecations.html#dep0161-process_getactiverequests-and-process_getactivehandles
• We previously used the internal methods to get active requests and active handles
• These functions are officially deprecated and the official public fn getActiveResourcesInfo exposes the signals together.
• Its too much effort to determine which signal belongs to which category (request or handle).
• Decided to just return the full number of active resources
• FedRamp allows public interfaces only

Next Instana Release Date

23/02/2026

Release Plan – Phase 1

• Create BE pull request (add activeResources metric) https://github.ibm.com/instana/backend/pull/35484
• Merge the BE pull request. (The changes will be available in Pink)
• Create UI client changes:
  • Remove activeHandles and activeRequests.
  • Use activeResources instead.
• Raise UI pull request https://github.ibm.com/instana/ui-client/pull/24723
• Test BE changes (pink) along with UI changes in the local environment.
• Test tracer changes together with BE (pink) and UI client locally.
• Merge UI pull request.
• Release UI and BE.
• Verify tracer changes with BE (production) and UI client (production).
• Release Node.js tracer.

Release Plan – Phase 2

• Remove activeHandles and activeRequests from BE.
• Testing.

refs https://jsw.ibm.com/browse/INSTA-64143
refs https://jsw.ibm.com/browse/INSTA-64277

[kirrg001]

Migration path:

• BE receives activeRequests + activeHandles OR activeResources and provides one single metric to the ui client
• UI client dashboard metric only shows the activeResources
• If both changes are live, we can merge this fix without a major release!