javax.jms.JMSException : An existing connection was forcibly closed by the remote host

Question

我是一名新手，正在尝试将 qpid 与 Apache Camel 集成。我需要编写java代码来使用qpid从队列中读取和写入。

首先我从 qpid 网站下载了 JMS 示例。我尝试运行的代码是。

/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 */
package org.apache.qpid.jms.example;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.ExceptionListener;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.naming.Context;
import javax.naming.InitialContext;

public class HelloWorld {
    public static void main(String[] args) throws Exception {
        try {
            // The configuration for the Qpid InitialContextFactory has been supplied in
            // a jndi.properties file in the classpath, which results in it being picked
            // up automatically by the InitialContext constructor.
            Context context = new InitialContext();

            ConnectionFactory factory = (ConnectionFactory) context.lookup("myFactoryLookup");
            Destination queue = (Destination) context.lookup("myQueueLookup");

            Connection connection = factory.createConnection(System.getProperty("USER"), System.getProperty("PASSWORD"));
            connection.setExceptionListener(new MyExceptionListener());
            connection.start();

            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

            MessageProducer messageProducer = session.createProducer(queue);
            MessageConsumer messageConsumer = session.createConsumer(queue);

            TextMessage message = session.createTextMessage("Hello world!");
            messageProducer.send(message, DeliveryMode.NON_PERSISTENT, Message.DEFAULT_PRIORITY, Message.DEFAULT_TIME_TO_LIVE);
            TextMessage receivedMessage = (TextMessage) messageConsumer.receive(2000L);

            if (receivedMessage != null) {
                System.out.println(receivedMessage.getText());
            } else {
                System.out.println("No message received within the given timeout!");
            }

            connection.close();
        } catch (Exception exp) {
            System.out.println("Caught exception, exiting.");
            exp.printStackTrace(System.out);
            System.exit(1);
        }
    }

    private static class MyExceptionListener implements ExceptionListener {
        @Override
        public void onException(JMSException exception) {
            System.out.println("Connection ExceptionListener fired, exiting.");
            exception.printStackTrace(System.out);
            System.exit(1);
        }
    }
}

这取决于文件::

# Set the InitialContextFactory class to use
java.naming.factory.initial = org.apache.qpid.jms.jndi.JmsInitialContextFactory
# Define the required ConnectionFactory instances
# connectionfactory.<JNDI-lookup-name> = <URI>
connectionfactory.myFactoryLookup = amqp://localhost:5672

# Configure the necessary Queue and Topic objects
# queue.<JNDI-lookup-name> = <queue-name>
# topic.<JNDI-lookup-name> = <topic-name>
queue.myQueueLookup = queue
topic.myTopicLookup = topic

现在我明白，为了让它发挥作用，我需要一种称为代理服务的东西。经过一些研究，我发现我可以使用 RabbitMQ 来实现此目的。所以我将它下载到我的 Windows 计算机上，并尝试在端口 localhost:5672

上连接到它

但是当我运行代码时，出现错误::

2017-05-04 11:28:29,329 [main           ] - ERROR JmsConnection                  - Failed to connect to remote at: amqp://localhost:5672
Caught exception, exiting.
javax.jms.JMSException: An existing connection was forcibly closed by the remote host
    at org.apache.qpid.jms.exceptions.JmsExceptionSupport.create(JmsExceptionSupport.java:86)
    at org.apache.qpid.jms.exceptions.JmsExceptionSupport.create(JmsExceptionSupport.java:108)
    at org.apache.qpid.jms.JmsConnection.connect(JmsConnection.java:172)
    at org.apache.qpid.jms.JmsConnectionFactory.createConnection(JmsConnectionFactory.java:204)
    at org.apache.qpid.jms.example.HelloWorld.main(HelloWorld.java:48)
Caused by: java.io.IOException: An existing connection was forcibly closed by the remote host
    at sun.nio.ch.SocketDispatcher.read0(Native Method)
    at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
    at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
    at sun.nio.ch.IOUtil.read(IOUtil.java:192)
    at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
    at io.netty.buffer.PooledUnsafeDirectByteBuf.setBytes(PooledUnsafeDirectByteBuf.java:288)
    at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1100)
    at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:372)
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:123)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:624)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:559)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:476)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:438)
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
    at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
    at java.lang.Thread.run(Thread.java:745)

为什么会出现这个错误？而这个端口肯定正在我的本地机器上监听。再说一遍，我是 JMS 的新手，因此我们将不胜感激任何指导:)

Answer 1

正如 Tim 提到的，您至少还需要确保加载代理实验性 AMQP 1.0 插件，但您没有提到这样做。

但是，在这种情况下，可能没有太大区别。我之前在 RabbitMQ 上使用 JMS 客户端或其他一些 AMQP 1.0 客户端并没有取得太大成功，因为我报告的一个问题在创建消费者和生产者时阻止了它们:https://github.com/rabbitmq/rabbitmq-amqp1.0/issues/34

您提到的研究决定使用 RabbitMQ，这听起来您并没有依赖于现有的服务器解决方案？如果是这样，对于支持 AMQP 1.0 且经常使用 JMS 客户端的其他服务器，您可以尝试 ActiveMQ、ActiveMQ Artemis、Qpid for Java 代理、Qpid C++ 代理或 Qpid Dispatch 路由器(不适用于 Windows，您可以使用它)提及使用)等。