Question

我使用JmsTemplate从同一客户端连接到两个IBM MQ服务器。

我已经配置了JmsTemplate的reconnectOnException以及IBM MQ连接工厂的setClientReconnectOptions。

Spring bean定义：

<bean id="firstMQCachingConnectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory">
        <property name="targetConnectionFactory" ref="firstMQConnectionFactory" />
        <property name="sessionCacheSize" value="20" /> 
        <property name="reconnectOnException" value="true"/>
</bean>

<bean id="secondMQCachingConnectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory">
        <property name="targetConnectionFactory" ref="secondMQConnectionFactory" />
        <property name="sessionCacheSize" value="20" /> 
        <property name="reconnectOnException" value="true"/>
</bean>

设置IBM MQ重新连接选项：

firstMQConnectionFactory.setClientReconnectOptions(WMQConstancs.WMQ_CLIENT_RECONNECT;
firstMQConnectionFactory.setClientReconnectTimeout(5);
secondMQConnectionFactory.setClientReconnectOptions(WMQConstancs.WMQ_CLIENT_RECONNECT;
secondMQConnectionFactory.setClientReconnectTimeout(5);

这就是我发送消息的方式：

public boolean sendMsg(final String content) throws JmsException{
    boolean success = false;
    LOGGER.info("sendMsg: Start ") ;
    try { 
        jmsTemplate.send(new MessageCreator() {
            @Override
            public Message createMessage(Session session) throws JMSException {
                TextMessage textMessage = session.createTextMessage(content);
                textMessage.setStringProperty(WMQConstants.JMS_IBM_CHARACTER_SET,  "UTF8");
                textMessage.setIntProperty(WMQConstants.JMS_IBM_ENCODING,
                        WMQConstants.WMQ_ENCODING_NATIVE);
                textMessage.setJMSDeliveryMode(DeliveryMode.PERSISTENT);
                return textMessage;
            }
        });
        LOGGER.info("sendMsg: Message sent to MQ successfully");
        success = true;
    } catch (JmsException je) {
        LOGGER.error("sendMsg: JmsException " + je.getMessage());
        throw je;
    } catch (Exception exc) {
        LOGGER.error("sendMsg: Exception message: " + exc.getMessage());
        throw exc;
    }
    return success; 
}

如果在低系统负载期间没有使用任何连接，则Spring会检测到与第一个系统的断开连接。

18 Nov 2017 20:41:03,924 WARN CachingConnectionFactory:322 - Encountered a JMSException - resetting the underlying JMS Connection
com.ibm.msg.client.jms.DetailedJMSException: JMSWMQ1107: A problem with this connection has occurred.
Caused by: com.ibm.mq.MQException: JMSCMQ0001: WebSphere MQ call failed with compcode '2' ('MQCC_FAILED') reason '2009' ('MQRC_CONNECTION_BROKEN').
18 Nov 2017 20:41:03,940 DEBUG CachingConnectionFactory:486 - Closing cached Session: com.ibm.mq.jms.MQQueueSession@4cbb56ac
18 Nov 2017 20:41:04,006 DEBUG CachingConnectionFactory:447 - Closing shared JMS Connection: com.ibm.mq.jms.MQQueueConnection@48d23557
18 Nov 2017 20:41:04,008 DEBUG CachingConnectionFactory:463 - Could not close shared JMS Connection
com.ibm.msg.client.jms.DetailedJMSException: JMSWMQ0019: Failed to disconnect from queue manager 'QM1' using connection mode '1' and host name 'system1.company.com(62305)'.
Caused by: com.ibm.mq.MQException: JMSCMQ0001: WebSphere MQ call failed with compcode '2' ('MQCC_FAILED') reason '2009' ('MQRC_CONNECTION_BROKEN').
Caused by: com.ibm.mq.jmqi.JmqiException: CC=2;RC=2009;AMQ9208: Error on receive from host 'system1.company.com/10.0.0.1:62305 (system1.company.com)'. [1=-1,2=ffffffff,3=system1.company.com/10.0.0.1:62305 (system1.company.com),4=TCP]

这会以某种方式影响到第二个系统的JmsTemplate连接，并且在使用时我得到一个没有消息的异常。

18 Nov 2017 23:43:40,247 DEBUG JmsTemplate:482 - Executing callback on JMS Session: Cached JMS Session: com.ibm.mq.jms.MQQueueSession@5a4a62d0
18 Nov 2017 23:43:40,248 DEBUG JmsTemplate:595 - Sending created message: 
18 Nov 2017 23:43:40,251 ERROR MessageSender:86 - sendMsg: Exception message: null

堆栈跟踪

java.lang.NullPointerException
    at com.ibm.mq.jmqi.remote.impl.RemoteSession.checkIfDisconnected(RemoteSession.java:249)
    at com.ibm.mq.jmqi.remote.api.RemoteFAP.jmqiPutMessageWithProps(RemoteFAP.java:9045)
    at com.ibm.mq.jmqi.remote.api.RemoteFAP.jmqiPut(RemoteFAP.java:8115)
    at com.ibm.mq.ese.jmqi.InterceptedJmqiImpl.jmqiPut(InterceptedJmqiImpl.java:624)
    at com.ibm.mq.ese.jmqi.ESEJMQI.jmqiPut(ESEJMQI.java:635)
    at com.ibm.msg.client.wmq.internal.WMQMessageProducer$SpiIdentifiedProducerShadow.sendInternal(WMQMessageProducer.java:864)
    at com.ibm.msg.client.wmq.internal.WMQMessageProducer$ProducerShadow.send(WMQMessageProducer.java:548)
    at com.ibm.msg.client.wmq.internal.WMQMessageProducer.send(WMQMessageProducer.java:1393)
    at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.sendMessage(JmsMessageProducerImpl.java:851)
    at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.synchronousSendInternal(JmsMessageProducerImpl.java:2051)
    at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.sendInternal(JmsMessageProducerImpl.java:1989)
    at com.ibm.msg.client.jms.internal.JmsMessageProducerImpl.send(JmsMessageProducerImpl.java:1569)
    at com.ibm.mq.jms.MQMessageProducer.send(MQMessageProducer.java:321)
    at org.springframework.jms.connection.CachedMessageProducer.send(CachedMessageProducer.java:181)
    at sun.reflect.GeneratedMethodAccessor120.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.jms.connection.CachedMessageProducer$Jms2MessageProducerInvocationHandler.invoke(CachedMessageProducer.java:293)
    at com.sun.proxy.$Proxy59.send(Unknown Source)
    at org.springframework.jms.core.JmsTemplate.doSend(JmsTemplate.java:626)
    at org.springframework.jms.core.JmsTemplate.doSend(JmsTemplate.java:597)
    at org.springframework.jms.core.JmsTemplate$3.doInJms(JmsTemplate.java:562)
    at org.springframework.jms.core.JmsTemplate.execute(JmsTemplate.java:484)
    at org.springframework.jms.core.JmsTemplate.send(JmsTemplate.java:559)
    at org.springframework.jms.core.JmsTemplate.send(JmsTemplate.java:550)

为什么一个CachingConnectionFactory的断开连接会影响另一个？
为什么第二个连接无法从“异常”恢复一次它检测到了吗？
我是否需要在JmsException中为Spring jms包装Exception来检测它？

Answer 1

我们可以通过更改网络连接来创建错误。

当打开IBM MQ客户端的重新连接并更改网络时，它会自动刷新引擎盖下的连接。 Spring JMS不会总是意识到这种刷新，并将我置于一个CachingConnectionFactory中的连接将被刷新而不是其他连接的状态。

我通过不设置setClientReconnectOptions关闭IBM MQ客户端重新连接，让spring处理所有连接更改和问题。这修复了上述错误。

JmsTemplate与IBM MQ队列的CachingConnectionFactory连接恢复

1 个答案: