@Override
  public void connectionEstablished(SocketAddress sa, int reconnectCount) {
    if (authDescriptor != null) {
      if (authDescriptor.authThresholdReached()) {
        shutdown();
      }
      authMonitor.authConnection(mconn, opFact, authDescriptor, findNode(sa));
    }
  }
Remove a connection observer.

@param obs the ConnectionObserver you wish to add
@return true if the observer existed, but no longer does
src/main/java/net/spy/memcached/MemcachedClient.java