James Netherton created CAMEL-23811:
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Summary: camel-micrometer: app.info gauge value uses weak
reference causing NaN values
Key: CAMEL-23811
URL: https://issues.apache.org/jira/browse/CAMEL-23811
Project: Camel
Issue Type: Bug
Components: camel-micrometer
Reporter: James Netherton
Relates to one of the issues reported in this Zulip thread:
https://camel.zulipchat.com/#narrow/channel/257302-camel-quarkus/topic/Strange.20behavior.20from.20app_info.20metric/with/605650573
The app.info metric registered by AbstractMicrometerService.registerAppInfo()
uses meterRegistry.gaugeCollectionSize() with a new ArrayList<>() that is not
stored in any field.
Micrometer holds a weak reference to the collection, so once the GC collects
it, the gauge returns NaN — and eventually the metric disappears entirely.
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