Web applications JMS MessageListener从ServletContextListener启动，一段时间后停止

我正在创建一个在JBOSS 5.1.0ga AS/Sun OS上运行的RichFaces Web应用程序。该应用程序还处理JMS请求（从运行在不同服务器中的Weblogic队列读取请求，并将响应写回运行在该服务器中的另一个Weblogic队列）。我通过扩展MessageListener类使用异步消息处理，并在ServletContextListener中启动了侦听。一切正常，但一段时间后（至少5到6小时后），侦听器停止侦听队列，如果我重新启动服务器，侦听器也会读取旧消息。 我不明白为什么中间会停下来。在Web应用程序中启动侦听器还有其他有效的方法吗

ServletContextListener

public class WebApplicationListener implements ServletContextListener {
public void contextInitialized(ServletContextEvent contextEvent) {
    System.out.println("Starting the JMS Listener");
    new JMSConnector().startListening();
}

public void contextDestroyed(ServletContextEvent contextEvent) {
}

public class JMSConnector{
static Properties properties = new Properties();

static Context context;
static QueueConnectionFactory connFactory;
static {
    Properties props = new Properties();
    InputStream inputStream = new JMSConnector().getClass()
            .getClassLoader()
            .getResourceAsStream("jmsconnection.properties");
    // ClassLoader.getSystemResource("/HibernateConfigFile.properties").openStream()
    try {
        properties.load(inputStream);
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
    props.setProperty(Context.INITIAL_CONTEXT_FACTORY,
            properties.getProperty("context_factory_class"));
    // props.setProperty("java.naming.factory.url.pkgs",
    // properties.getProperty("naming_url_pkgs"));
    props.setProperty(Context.PROVIDER_URL,
            properties.getProperty("provider_url"));
    try {
        context = new InitialContext(props);
        connFactory = (QueueConnectionFactory) context.lookup(properties
                .getProperty("connection_factory_name"));
    } catch (NamingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}


public void sendMessage(String responseMessage) throws Exception {

    QueueConnection conn = connFactory.createQueueConnection();
    // This session is not transacted, and it uses automatic message
    // acknowledgement
    QueueSession session = conn.createQueueSession(false,
            Session.AUTO_ACKNOWLEDGE);
    Queue q = (Queue) context.lookup(properties
            .getProperty("responsequeue"));
    // Sender
    QueueSender sender = session.createSender(q);
    // Text message
    TextMessage msg = session.createTextMessage();
    msg.setText(responseMessage);
    System.out.println("Sending the message: " + msg.getText());
    sender.send(msg);
    session.close();
    conn.close();
}
public void startListening() {
    try {

        System.out.println("In Start Listening");

        QueueConnection conn = connFactory.createQueueConnection();
        // This session is not transacted, and it uses automatic message
        // acknowledgement
        QueueSession session = conn.createQueueSession(false,
                Session.AUTO_ACKNOWLEDGE);
        Queue q = (Queue) context.lookup(properties
                .getProperty("requestqueue"));

        QueueReceiver receiver = session.createReceiver(q);
        RequestListener requestListener = new RequestListener();
        receiver.setMessageListener(requestListener);
        conn.start();

    } catch (Exception e) {
        e.printStackTrace();
    }
}

public class RequestListener implements MessageListener {

/**
 * Casts the message to a TextMessage and displays its text.
 * 
 * @param message
 *            the incoming message
 */
public void onMessage(Message message) {
    System.out.println("Message Received");
    TextMessage msg = null;

    try {
        if (message instanceof TextMessage) {
            msg = (TextMessage) message;
            String requestXml = msg.getText();
            //Calling Processing Methods
            new JMSConnector().sendMessage(responseXml);
        } else {
            System.out.println("Message of wrong type: "
                    + message.getClass().getName());
        }
    } catch (JMSException e) {
        System.out.println("JMSException in onMessage(): " + e.toString());
    } catch (Throwable t) {
        System.out.println("Exception in onMessage():" + t.getMessage());
    }
}

}

JMS连接器

public class WebApplicationListener implements ServletContextListener {
public void contextInitialized(ServletContextEvent contextEvent) {
    System.out.println("Starting the JMS Listener");
    new JMSConnector().startListening();
}

public void contextDestroyed(ServletContextEvent contextEvent) {
}

public class JMSConnector{
static Properties properties = new Properties();

static Context context;
static QueueConnectionFactory connFactory;
static {
    Properties props = new Properties();
    InputStream inputStream = new JMSConnector().getClass()
            .getClassLoader()
            .getResourceAsStream("jmsconnection.properties");
    // ClassLoader.getSystemResource("/HibernateConfigFile.properties").openStream()
    try {
        properties.load(inputStream);
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
    props.setProperty(Context.INITIAL_CONTEXT_FACTORY,
            properties.getProperty("context_factory_class"));
    // props.setProperty("java.naming.factory.url.pkgs",
    // properties.getProperty("naming_url_pkgs"));
    props.setProperty(Context.PROVIDER_URL,
            properties.getProperty("provider_url"));
    try {
        context = new InitialContext(props);
        connFactory = (QueueConnectionFactory) context.lookup(properties
                .getProperty("connection_factory_name"));
    } catch (NamingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}


public void sendMessage(String responseMessage) throws Exception {

    QueueConnection conn = connFactory.createQueueConnection();
    // This session is not transacted, and it uses automatic message
    // acknowledgement
    QueueSession session = conn.createQueueSession(false,
            Session.AUTO_ACKNOWLEDGE);
    Queue q = (Queue) context.lookup(properties
            .getProperty("responsequeue"));
    // Sender
    QueueSender sender = session.createSender(q);
    // Text message
    TextMessage msg = session.createTextMessage();
    msg.setText(responseMessage);
    System.out.println("Sending the message: " + msg.getText());
    sender.send(msg);
    session.close();
    conn.close();
}
public void startListening() {
    try {

        System.out.println("In Start Listening");

        QueueConnection conn = connFactory.createQueueConnection();
        // This session is not transacted, and it uses automatic message
        // acknowledgement
        QueueSession session = conn.createQueueSession(false,
                Session.AUTO_ACKNOWLEDGE);
        Queue q = (Queue) context.lookup(properties
                .getProperty("requestqueue"));

        QueueReceiver receiver = session.createReceiver(q);
        RequestListener requestListener = new RequestListener();
        receiver.setMessageListener(requestListener);
        conn.start();

    } catch (Exception e) {
        e.printStackTrace();
    }
}

public class RequestListener implements MessageListener {

/**
 * Casts the message to a TextMessage and displays its text.
 * 
 * @param message
 *            the incoming message
 */
public void onMessage(Message message) {
    System.out.println("Message Received");
    TextMessage msg = null;

    try {
        if (message instanceof TextMessage) {
            msg = (TextMessage) message;
            String requestXml = msg.getText();
            //Calling Processing Methods
            new JMSConnector().sendMessage(responseXml);
        } else {
            System.out.println("Message of wrong type: "
                    + message.getClass().getName());
        }
    } catch (JMSException e) {
        System.out.println("JMSException in onMessage(): " + e.toString());
    } catch (Throwable t) {
        System.out.println("Exception in onMessage():" + t.getMessage());
    }
}

MessageListener

public class WebApplicationListener implements ServletContextListener {
public void contextInitialized(ServletContextEvent contextEvent) {
    System.out.println("Starting the JMS Listener");
    new JMSConnector().startListening();
}

public void contextDestroyed(ServletContextEvent contextEvent) {
}

public class JMSConnector{
static Properties properties = new Properties();

static Context context;
static QueueConnectionFactory connFactory;
static {
    Properties props = new Properties();
    InputStream inputStream = new JMSConnector().getClass()
            .getClassLoader()
            .getResourceAsStream("jmsconnection.properties");
    // ClassLoader.getSystemResource("/HibernateConfigFile.properties").openStream()
    try {
        properties.load(inputStream);
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
    props.setProperty(Context.INITIAL_CONTEXT_FACTORY,
            properties.getProperty("context_factory_class"));
    // props.setProperty("java.naming.factory.url.pkgs",
    // properties.getProperty("naming_url_pkgs"));
    props.setProperty(Context.PROVIDER_URL,
            properties.getProperty("provider_url"));
    try {
        context = new InitialContext(props);
        connFactory = (QueueConnectionFactory) context.lookup(properties
                .getProperty("connection_factory_name"));
    } catch (NamingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}


public void sendMessage(String responseMessage) throws Exception {

    QueueConnection conn = connFactory.createQueueConnection();
    // This session is not transacted, and it uses automatic message
    // acknowledgement
    QueueSession session = conn.createQueueSession(false,
            Session.AUTO_ACKNOWLEDGE);
    Queue q = (Queue) context.lookup(properties
            .getProperty("responsequeue"));
    // Sender
    QueueSender sender = session.createSender(q);
    // Text message
    TextMessage msg = session.createTextMessage();
    msg.setText(responseMessage);
    System.out.println("Sending the message: " + msg.getText());
    sender.send(msg);
    session.close();
    conn.close();
}
public void startListening() {
    try {

        System.out.println("In Start Listening");

        QueueConnection conn = connFactory.createQueueConnection();
        // This session is not transacted, and it uses automatic message
        // acknowledgement
        QueueSession session = conn.createQueueSession(false,
                Session.AUTO_ACKNOWLEDGE);
        Queue q = (Queue) context.lookup(properties
                .getProperty("requestqueue"));

        QueueReceiver receiver = session.createReceiver(q);
        RequestListener requestListener = new RequestListener();
        receiver.setMessageListener(requestListener);
        conn.start();

    } catch (Exception e) {
        e.printStackTrace();
    }
}

public class RequestListener implements MessageListener {

/**
 * Casts the message to a TextMessage and displays its text.
 * 
 * @param message
 *            the incoming message
 */
public void onMessage(Message message) {
    System.out.println("Message Received");
    TextMessage msg = null;

    try {
        if (message instanceof TextMessage) {
            msg = (TextMessage) message;
            String requestXml = msg.getText();
            //Calling Processing Methods
            new JMSConnector().sendMessage(responseXml);
        } else {
            System.out.println("Message of wrong type: "
                    + message.getClass().getName());
        }
    } catch (JMSException e) {
        System.out.println("JMSException in onMessage(): " + e.toString());
    } catch (Throwable t) {
        System.out.println("Exception in onMessage():" + t.getMessage());
    }
}

---

}

我对您的问题没有答案，但对代码有一点意见。为了理智起见，请在捕获JMS异常时打印链接的异常！JMS异常是相当通用的，并且存在链接异常，以便传输供应商提供传输问题视图的低级细节。如果存在链接异常，则它将是诊断问题的关键。我通常告诉我的客户，打印链接异常的失败应该是阻止部署到生产的原因。好的，完成了。希望现在有人能给出一个真实的答案。谢谢Rob的评论，我会在这里打印链接的异常。为什么你不使用MDB？对我来说，你的解决方案听起来像是一个不必要的黑客……在

startListening

方法中没有引用任何项，因此它们可能是垃圾收集的候选项

connFactory

和

context

是唯一的成员变量，也许这就是原因？你曾经解决过这个问题吗？你可以试着把

JMSConnector

做成一个单例，看看效果是否更好。