Java RabbitMQ连接在调用通道后关闭。关闭（）

我正在使用Java RabbitMQ客户端。我发布一条消息（basicPublish），然后关闭频道。在使用者中，channel.basicAck抛出异常：

com.rabbitmq.client.AlreadyClosedException: connection is already closed due to connection error; cause: java.util.concurrent.RejectedExecutionException: Task com.rabbitmq.client.impl.ConsumerWorkService$WorkPoolRunnable@665de7c7 rejected from java.util.concurrent.ThreadPoolExecutor@35f53993[Running, pool size = 5, active threads = 5, queued tasks = 0, completed tasks = 5]

如果删除channel.close（），则不会再现错误。当我关闭频道时，为什么连接关闭

已向exchange发送邮件：

Channel channel = connection.createChannel();
Set<String> expectedMessages = new HashSet<>(MESSAGES_COUNT);
for (int i = 0; i < MESSAGES_COUNT; i++) {
    String message = Integer.toString(i);
    channel.basicPublish(
        TEST_EXCHANGE,
        ROUTE_KEY,
        TEXT_PLAIN,
        message.getBytes("UTF-8")
    );
    expectedMessages.add(message);
}
channel.close();

---

问题出在错误的connectionFactory设置中。 不正确：

    executorService = new ThreadPoolExecutor(
            properties.minThreads, properties.maxThreads,
            properties.maxThreadIdle, TimeUnit.SECONDS,
            new SynchronousQueue<>()
    );
    connectionFactory.setSharedExecutor(executorService);

executorService=新线程池执行器(
properties.minThreads、properties.maxThreads、，
properties.maxThreadIdle，TimeUnit.SECONDS，
新的SynchronousQueue（）
);
连接工厂。设置共享执行器（执行器服务）；

对于正确的工作：

    executorService = new ThreadPoolExecutor(
            properties.minThreads, properties.maxThreads,
            properties.maxThreadIdle, TimeUnit.SECONDS,
            new LinkedBlockingQueue<>()
    );
    connectionFactory.setSharedExecutor(executorService);

executorService=新线程池执行器(
properties.minThreads、properties.maxThreads、，
properties.maxThreadIdle，TimeUnit.SECONDS，
新建LinkedBlockingQueue（）
);
连接工厂。设置共享执行器（执行器服务）；

当您关闭频道但未关闭连接时，您的代码中可能存在另一个错误。这种行为的原因是什么？我不能关闭频道吗？没有代码很难知道！

    executorService = new ThreadPoolExecutor(
            properties.minThreads, properties.maxThreads,
            properties.maxThreadIdle, TimeUnit.SECONDS,
            new LinkedBlockingQueue<>()
    );
    connectionFactory.setSharedExecutor(executorService);