es 2.3.3 向es添加数据报NoNodeAvailableException[None of the configured nodes are available

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本文描述了在Windows环境下，使用单机版ES2.3.3进行数据定时添加时遇到的NoNodeAvailableException问题及解决方案。通过修改ES客户端连接方式，从公共静态连接改为每次请求时初始化并使用单次客户端，有效避免了连接异常。

一.问题描述

在windows中搭建了一个单机版的es2.3.3 ，定时向es中添加数据，第一次添加没有问题，第二次提示NoNodeAvailableException[None of the configured nodes are available，奶奶的，经过一上午的调试排查，终于解决了。

用了一个公共的客户端连接，报错，初始化新的客户端，通过debug查看，还是同样的hashcode值，也就是说还是同一个，

原来在这里：

public class ESUtils {
    public static Client client=null;
    private static int hostPort=32016;
    private static String  hostClusterNode1="192.168.168.160";
    private static String  hostClusterNode2="192.168.168.161";
    private static String  hostClusterNode3="192.168.168.162";

    /**
     * 方法描述：    公共获取连接
     * @param:
     * @return:
     **/
    public static Client getESClientConnection(String indexName,String typeName,String clusterName,String nodes) {
        if (client == null) {
            System.err.println("-------连接es----------------------------");
            System.setProperty("es.set.netty.runtime.available.processors", "false");
            try {
                //设置集群名称
                Settings settings = Settings.builder().put("cluster.name", clusterName)
                        .put("client.transport.sniff", true)
                        .put("client.transport.ping_timeout", "600s").build();

                   String esNodes[]=nodes.split(",");
                //创建client
                String host=esNodes[0].split(":")[0];
                int port=Integer.parseInt(esNodes[0].split(":")[1]);
                client = TransportClient.builder().settings(settings).build()
                        .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(host), port));
                       // .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(hostClusterNode1), hostPort))
                       // .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(hostClusterNode2), hostPort))
                        //.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(hostClusterNode3), hostPort));
            } catch (Exception ex) {
                ex.printStackTrace();
                System.out.println(ex.getMessage());
                if (client != null) {
                    client.close();
                }
            }
        }
        return client;
    }

二.解决思路：

将初始化链接es的客户端，公共客户端，改为单次客户端，执行完一次，关闭掉，下次使用，再次初始化。

如果报异常，捕获到，重新初始化客户端。

public class ESUtils {
    //public static Client client=null;
    private static int hostPort=32016;
    private static String  hostClusterNode1="192.168.168.160";
    private static String  hostClusterNode2="192.168.168.161";
    private static String  hostClusterNode3="192.168.168.162";

    /**
     * 方法描述：    公共获取连接
     * @auther:    ypy
     * @data:      2019/3/4 17:44
     * @param:
     * @return:
     **/
    public static Client getESClientConnection(String indexName,String typeName,String clusterName,String nodes) {
        Client    singleEsClient=null;
        if (singleEsClient == null) {
            System.err.println("-------连接es----------------------------");
            System.setProperty("es.set.netty.runtime.available.processors", "false");
            try {
                //设置集群名称
                Settings settings = Settings.builder().put("cluster.name", clusterName)
                        .put("client.transport.sniff", true)
                        .put("client.transport.ping_timeout", "600s").build();

                   String esNodes[]=nodes.split(",");
                //创建client
                String host=esNodes[0].split(":")[0];
                int port=Integer.parseInt(esNodes[0].split(":")[1]);
                singleEsClient = TransportClient.builder().settings(settings).build()
                        .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(host), port));
                       // .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(hostClusterNode1), hostPort))
                       // .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(hostClusterNode2), hostPort))
                        //.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(hostClusterNode3), hostPort));
            } catch (Exception ex) {
                ex.printStackTrace();
                System.out.println(ex.getMessage());
                if (singleEsClient != null) {
                    singleEsClient.close();
                }
            }
        }
        return singleEsClient;
    }