Github user Randgalt commented on a diff in the pull request:
    --- Diff: src/java/main/org/apache/zookeeper/server/ ---
    @@ -97,23 +102,44 @@ synchronized void removeWatcher(Watcher watcher) {
         Set<Watcher> triggerWatch(String path, EventType type, Set<Watcher> 
supress) {
             WatchedEvent e = new WatchedEvent(type,
                     KeeperState.SyncConnected, path);
    -        HashSet<Watcher> watchers;
    +        Set<Watcher> watchers = new HashSet<>();
    +        PathIterator pathIterator = new PathIterator(path);
             synchronized (this) {
    -            watchers = watchTable.remove(path);
    -            if (watchers == null || watchers.isEmpty()) {
    -                if (LOG.isTraceEnabled()) {
    -                    ZooTrace.logTraceMessage(LOG,
    -                            ZooTrace.EVENT_DELIVERY_TRACE_MASK,
    -                            "No watchers for " + path);
    +            for (String localPath : pathIterator.asIterable()) {
    --- End diff --
    It occurs to me that a check could be made to see if there are any 
Persistent watchers registered and skip if there aren't. I'll make that change.

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