我正在使用JmsTemplate从同一客户机连接到两个IBM MQ服务器。
我已经配置了JmsTemplate的reconnectOnException以及IBM MQ连接工厂的setClientReconnectOptions。
春豆的定义：
<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;
}
在低系统负载期间不使用任何连接时，Spring会检测到与第一个系统的连接断开。
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]
这在某种程度上影响了JmsTemplate与第二个系统的连接，并且在使用时我收到了一条没有消息的异常。
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？
为什么第二个连接一次无法从“异常”中恢复
它检测到了吗？
我是否需要在JmsException中包装Exception，以便Spring jms能够检测到它？
最佳答案
我们可以通过更改网络连接来创建错误。
打开IBM MQ客户端的重新连接并更改网络后，它将自动刷新后台的连接。 Spring JMS并不总是能够实现这种刷新并使我处于一种状态，即一个CachingConnectionFactory中的连接将被刷新，而其他情况则不会。
我通过不设置setClientReconnectOptions来关闭IBM MQ客户端重新连接，并让spring处理所有连接更改和问题。这修复了上面的错误。