Question

我正在使用Apache Ignite进行缓存，并在单节点上运行服务器，仅使用以下代码初始化Ignite客户端： -

公共类IgniteUtil {

private static final Log logger = LogFactory.getLog(IgniteUtil.class.getName());


public static boolean initializeIgniteClient() {

    try{    
        String hostName="localhost:47500..47509";

        logger.info("Connecting to Apache ignite Server with host:port=" + hostName);           
        TcpDiscoverySpi spi = new TcpDiscoverySpi();
        IgniteConfiguration cfg = new IgniteConfiguration();
        TcpDiscoveryVmIpFinder finder =new TcpDiscoveryVmIpFinder();
        List<String>addressList=new ArrayList<>();
        addressList.add(hostName);
        finder.setAddresses(addressList);
        spi.setIpFinder(finder);

        spi.setJoinTimeout(600);
        cfg.setDiscoverySpi(spi);
        cfg.setPeerClassLoadingEnabled(true);
        Ignition.setClientMode(true);
        URL xml = U.resolveIgniteUrl("log4j2.xml", false);
        IgniteLogger log = new Log4J2Logger(xml);
        cfg.setGridLogger(log);
        Ignition.start(cfg);
        if(!Ignition.ignite().cluster().forServers().nodes().isEmpty())
        {           
            logger.info("Connecting to Apache ignite Server SUCCESS with hostName="+hostName);
            return true;
        }else{
            logger.error("Connecting to Apache ignite Server FAILED with hostName="+hostName);
            return false;
        }
    }catch(Exception e)
    {
        logger.error("Connection to Apache ignite Server failed...",e);
        e.printStackTrace();
        return false;
    }

}

假设当点燃服务器关闭时，抛出异常并使用下面的代码尝试重新连接客户端。每次尝试重新连接服务器都会产生大约20秒的延迟，直到服务器关闭。我怎样才能以最佳方式克服这个问题？

catch(Exception e)
        {
            if(e instanceof CacheException) {
                if (e.getCause() instanceof
                        IgniteClientDisconnectedException)
                {
                    Ignition.stop(true);
                    IgniteUtil.initializeIgniteClient();
                    logger.info("Reattempt failed");
                }else if (e.getCause() instanceof
                        IgniteClientDisconnectedCheckedException) {
                    Ignition.stop(true);
                    IgniteUtil.initializeIgniteClient();
                    logger.info("Reattempt failed");
                }else if (e.getCause() instanceof
                        NodeStoppingException) {
                    Ignition.stop(true);
                    IgniteUtil.initializeIgniteClient();
                    logger.info("Reattempt failed");
                }else{
                    // nothing to do as not related to ignite server shutdown       
                    e.printStackTrace();
                }
            } else if(e instanceof IllegalStateException) {
                Ignition.stop(true);
                IgniteUtil.initializeIgniteClient();
                logger.info("Reattempt failed");
            }else{
                // nothing to do as not related to ignite server shutdown           }
                e.printStackTrace();
            }
        }

Answer 1

如果服务器出现故障，客户端将抛出IgniteClientDisconnectedException，它有一个未来，将在客户端再次重新连接到服务器时完成： IgniteClientDisconnectedException.reconnectFuture().get()。

服务器重启时Apache Ignite客户端重新连接

1 个答案: