lhotari opened a new pull request #10192:
URL: https://github.com/apache/pulsar/pull/10192
### Motivation
There's a memory leak in tests via Prometheus client default
CollectorRegistry.
### Modifications
- Unregister JettyStatisticsCollector from Prometheus client's default
Collector registry at shutdown
- Clear metricsServlet reference at shutdown of PulsarService
- Unrelated to the collector unregister fix.
- In tests: helps release the Jetty webserver parts for GC when there are
references preventing PulsarService from being GCed.
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