eolivelli commented on issue #854: ZOOKEEPER-3143 Pluggable metrics system for ZooKeeper - Data Collection on Server URL: https://github.com/apache/zookeeper/pull/854#issuecomment-474718572 @anmolnar @enixon as far as I know AtomicReference wraps a volatile field so not a big deal https://github.com/openjdk-mirror/jdk7u-jdk/blob/master/src/share/classes/java/util/concurrent/atomic/AtomicReference.java
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