eolivelli opened a new pull request #918: ZOOKEEPER-3366: Pluggable metrics system for ZooKeeper - move remaining metrics to MetricsProvider URL: https://github.com/apache/zookeeper/pull/918 Migrate all remaining metrics to MetricsProvider. We are introducing now Gauges which are callbacks to be called when the Provider needs to publish current values. As during the lifecycle of a ZK server process we can have several ZooKeeperServer instances, depending on the role of the current process, we have to clean up unused Gauges, this is different from the old approach in which in 4lw and on http admin API we had hard coded metrics, with multiple 'instanceof' conditions.
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