public static void emptyCommBufferPool() {
    for (LinkedBlockingQueue<ByteBuffer> q : commBufferMap.values()) {
      q.clear();
    }
  }
The threadMonitorExecutor for this server connection.
This will be null if acceptor is a selector.
When a selector is used, the thread pool that is used to process client requests
will automatically register with the thread monitor the thread that is processing
the request. So no need to create a threadMonitorExecutor.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/ServerConnection.java