Github user maoling commented on a diff in the pull request: https://github.com/apache/zookeeper/pull/308#discussion_r131591962 --- Diff: src/java/main/org/apache/zookeeper/server/quorum/QuorumCnxManager.java --- @@ -880,19 +876,20 @@ public void run() { * * @return boolean Value of variable running */ - synchronized boolean finish() { - if(!running){ - /* - * Avoids running finish() twice. - */ - return running; - } - running = false; - - this.interrupt(); - threadCnt.decrementAndGet(); - return running; - } + boolean finish() { --- End diff -- Yes.we should keep a blance between optimization and readability.the most importance thing for this optimization is whether this function has faced a performace problem and this optimization is overdesign. Haha.self-criticism.However ,I find the shadow of this programming paradigm in zk code base [Line501~Line507](https://github.com/apache/zookeeper/blob/master/src/java/main/org/apache/zookeeper/ClientCnxn.java )
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