private ByteBuffer takeCommBuffer() {
    ByteBuffer result = commBufferQueue.poll();
    if (result == null) {
      result = ByteBuffer.allocateDirect(socketBufferSize);
    }
    return result;
  }
Hand off a new client connection to the thread pool that processes handshakes. If all the
threads in this pool are busy then the hand off will block until a thread is available. This
blocking is good because it will throttle the rate at which we create new connections.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/AcceptorImpl.java