[SOLR-13677] All Metrics Gauges should be unregistered by components that registered them

• Type: Improvement
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 8.3
• Component/s: metrics
• Assignee: Andrzej Bialecki
• Reporter: Noble Paul
• Created: 02/Aug/19 18:48
• Updated: 21/Jan/20 16:59
• Resolved: 18/Oct/19 20:02

Description

The life cycle of Metrics producers are managed by the core (mostly). So, if the lifecycle of the object is different from that of the core itself, these objects will never be unregistered from the metrics registry. This will lead to memory leaks

Issue Links

• causes: SOLR-13866 DUH2 stats not populated in PluginInfoHandler
• links to: GitHub Pull Request #836
• links to: GitHub Pull Request #863
• links to: GitHub Pull Request #959