Java 防止在ActiveMQ重新连接失败时自动退出
我安装了一个小型spring启动应用程序,它连接到ActiveMQ上的一个或多个主题,这些主题在启动时设置在应用程序的application.properties文件中,然后将这些消息发送到数据库 这一切都很好,但我在尝试实施故障切换时遇到了一些问题-基本上,应用程序将尝试重新连接,但在一定次数的重试后,应用程序进程将自动退出,从而阻止重试(理想情况下,我希望应用程序永远重试,直到手动终止或ActiveMQ再次可用为止)。我已尝试在连接URL中显式设置连接选项(例如Java 防止在ActiveMQ重新连接失败时自动退出,java,spring-boot,activemq,spring-jms,failover,Java,Spring Boot,Activemq,Spring Jms,Failover,我安装了一个小型spring启动应用程序,它连接到ActiveMQ上的一个或多个主题,这些主题在启动时设置在应用程序的application.properties文件中,然后将这些消息发送到数据库 这一切都很好,但我在尝试实施故障切换时遇到了一些问题-基本上,应用程序将尝试重新连接,但在一定次数的重试后,应用程序进程将自动退出,从而阻止重试(理想情况下,我希望应用程序永远重试,直到手动终止或ActiveMQ再次可用为止)。我已尝试在连接URL中显式设置连接选项(例如maxReconnectAtt
maxReconnectAttempts
)(使用application.properties中的URL.options
)到-1/0/99999,但没有一个是正确的,因为每次的行为都是相同的。从上的建议来看,我也希望这个行为也能作为默认行为工作
如果有人建议我不要退出该应用程序,我将不胜感激!我认为重要的代码如下:
@Configuration
public class AmqConfig {
private static final Logger LOG = LogManager.getLogger(AmqConfig.class);
private static final String LOG_PREFIX = "[AmqConfig] ";
private String clientId;
private static ArrayList<String> amqUrls = new ArrayList<>();
private static String amqConnectionUrl;
private static Integer numSubs;
private static ArrayList<String> destinations = new ArrayList<>();
@Autowired
DatabaseService databaseService;
public AmqConfig (@Value("${amq.urls}") String[] amqUrl,
@Value("${amq.options}") String amqOptions,
@Value("${tocCodes}") String[] tocCodes,
@Value("${amq.numSubscribers}") Integer numSubs,
@Value("${clientId}") String clientId) throws UnknownHostException {
Arrays.asList(amqUrl).forEach(url -> {
amqUrls.add("tcp://" + url);
});
String amqServerAddress = "failover:(" + String.join(",", amqUrls) + ")";
String options = Strings.isNullOrEmpty(amqOptions) ? "" : "?" + amqOptions;
this.amqConnectionUrl = amqServerAddress + options;
this.numSubs = Optional.ofNullable(numSubs).orElse(4);
this.clientId = Strings.isNullOrEmpty(clientId) ? InetAddress.getLocalHost().getHostName() : clientId;
String topic = "Consumer." + this.clientId + ".VirtualTopic.Feed";
if (tocCodes.length > 0){
Arrays.asList(tocCodes).forEach(s -> destinations.add(topic + "_" + s));
} else { // no TOC codes = connecting to default feed
destinations.add(topic);
}
}
@Bean
public ActiveMQConnectionFactory connectionFactory() throws JMSException {
LOG.info("{}Connecting to AMQ at {}", LOG_PREFIX, amqConnectionUrl);
LOG.info("{}Using client id {}", LOG_PREFIX, clientId);
ActiveMQConnectionFactory connectionFactory =
new ActiveMQConnectionFactory(amqConnectionUrl);
Connection conn = connectionFactory.createConnection();
conn.setClientID(clientId);
conn.setExceptionListener(new AmqExceptionListener());
conn.start();
destinations.forEach(destinationName -> {
try {
for (int i = 0; i < numSubs; i++) {
Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
Destination destination = session.createQueue(destinationName);
MessageConsumer messageConsumer = session.createConsumer(destination);
messageConsumer.setMessageListener(new MessageReceiver(databaseService, destinationName));
}
} catch (JMSException e) {
LOG.error("{}Error setting up queue @ {}", LOG_PREFIX, destinationName);
LOG.error(e.getMessage());
}
});
return connectionFactory;
}
}
public class MessageReceiver implements MessageListener, ExceptionListener {
public static final Logger LOG = LogManager.getLogger(MessageReceiver.class);
private static final String LOG_PREFIX = "[Message Receiver] ";
private DatabaseService databaseService;
public MessageReceiver(DatabaseService databaseService, String destinationName){
this.databaseService = databaseService;
LOG.info("{}Creating MessageReceiver for queue with destination: {}", LOG_PREFIX, destinationName);
}
@Override
public void onMessage(Message message) {
String messageText = null;
if (message instanceof TextMessage) {
TextMessage tm = (TextMessage) message;
try {
messageText = tm.getText();
} catch (JMSException e) {
LOG.error("{} Error getting message from AMQ", e);
}
} else if (message instanceof ActiveMQMessage) {
messageText = message.toString();
} else {
LOG.warn("{}Unrecognised message type, cannot process", LOG_PREFIX);
LOG.warn(message.toString());
}
try {
databaseService.sendMessageNoResponse(messageText);
} catch (Exception e) {
LOG.error("{}Unable to acknowledge message from AMQ. Message: {}", LOG_PREFIX, messageText, e);
}
}
}
public class AmqExceptionListener implements ExceptionListener {
public static final Logger LOG = LogManager.getLogger(AmqExceptionListener.class);
private static final String LOG_PREFIX = "[AmqExceptionListener ] ";
@Override
public void onException(JMSException e){
LOG.error("{}Exception thrown by ActiveMQ", LOG_PREFIX, e);
}
}
非常有趣的问题 配置maxReconnectAttempts=-1将导致连接尝试永远重试,但我觉得这里的问题如下:
祝你好运!你的应用程序启动正确吗?或者你在应用程序启动时遇到了这个问题?或者当某个节点出现故障时?如果应用程序启动时ActiveMQ启动,它工作正常。如果应用程序启动时ActiveMQ启动,那么应用程序将不会启动,并将为用户记录。我正在努力为一个启动正常但ActiveMQ关闭的应用程序进行某种形式的故障切换当它运行时。
[2019-12-12 14:43:30.292] [WARN ] Transport (tcp://[address]:61616) failed , attempting to automatically reconnect: java.io.EOFException
[2019-12-12 14:43:51.098] [WARN ] Failed to connect to [tcp://[address]:61616] after: 10 attempt(s) continuing to retry.
Process finished with exit code 0