This code leaves leaked "Timer-0" thread

gistfile1.groovy

import com.linkedin.norbert.javacompat.cluster.ZooKeeperClusterClient;

ZooKeeperClusterClient cc = new ZooKeeperClusterClient("client", "lobby", '192.168.15.2', 3000);
cc.shutdown();

while (true) {
    Thread.yield()
}