public static ExecutorService newFixedThreadPool(int nThreads, String poolName) {
    logger.info(NEW_FIXED_THREAD_POOL_LOGGER_FORMAT, poolName, nThreads);

    return new WrappedThreadPoolExecutor(
        nThreads,
        nThreads,
        0L,
        TimeUnit.MILLISECONDS,
        new LinkedBlockingQueue<>(),
        new IoTThreadFactory(poolName),
        poolName);
  }
see {@link Executors#newFixedThreadPool(int, java.util.concurrent.ThreadFactory)}.

@param poolName - the name of thread pool
@return fixed size thread pool
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/concurrent/IoTDBThreadPoolFactory.java