ElasticSearch客户端连接无法

Question

我在使用ElasticSearch Client时遇到问题。

我设计了一个Java应用程序（以完成开发人员研究），该应用程序管理不同的数据库MySQL，mongoDb和ElasticSearch。 我能够读取，创建并将数据库中的数据更新到另一个数据库。 所有内容均使用本地数据库进行设计和编码，并且一切正常。 所有测试均已通过验证，因此我们决定使其在实际数据库上的远程服务器上运行。

然后问题开始发生，尤其是自从两天以来一直困扰我的问题，我变得非常绝望。

• 使用TransportClient，它可以在本地运行，但是在真实服务器上，它会带来NoNodeAvailableException，表明没有已配置的节点可用。 尝试了很多事情以使其起作用，但没有成功。

• 因此，我决定尝试使用REST进行连接和请求。 这是我的代码，我得到的错误不是很详细：这是一个ConnectException。

代码：

    // Get the connection client from ES database
    public static RestHighLevelClient getConnection()
    {
        // Singleton
        if(client == null)
        {
            try             
            {       
                // Set Credz
                final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
                credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials("Login", "pwd"));             

                // Builder
                RestClientBuilder builder = RestClient.builder(new HttpHost("ServerIP", 9200, "http")).setHttpClientConfigCallback(new HttpClientConfigCallback() 
                {
                    @Override
                    public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) 
                    {   
                        System.out.println("Setting taken !");
                        return httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
                    }
                });                 

                // Create client
                client = new RestHighLevelClient (builder);

                ClusterHealthRequest healthReq = new ClusterHealthRequest("looppy-cluster");
                ClusterHealthResponse response = client.cluster().health(healthReq, RequestOptions.DEFAULT);
    int numberOfNodes = response.getNumberOfNodes(); 
            System.out.println("Nodes Nb : " + numberOfNodes);

            } 
            catch(Exception ex)
            {   
System.out.println("Client connection problem");
                ex.printStackTrace();
            }
        }       

        return client;
    }   

这是我得到的例外：

    java.net.ConnectException
    at org.elasticsearch.client.RestClient$SyncResponseListener.get(RestClient.java:943)
    at org.elasticsearch.client.RestClient.performRequest(RestClient.java:227)
    at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1256)
    at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1231)
    at org.elasticsearch.client.ClusterClient.health(ClusterClient.java:146)
    at utils.ElasticSearchMng.getConnection(ElasticSearchMng.java:86)
    at utils.ElasticSearchMng.getLoopiesFromES(ElasticSearchMng.java:133)
    at program.Program$1.run(Program.java:96)
    at java.awt.event.InvocationEvent.dispatch(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$500(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.net.ConnectException
    at org.apache.http.nio.pool.RouteSpecificPool.timeout(RouteSpecificPool.java:168)
    at org.apache.http.nio.pool.AbstractNIOConnPool.requestTimeout(AbstractNIOConnPool.java:561)
    at org.apache.http.nio.pool.AbstractNIOConnPool$InternalSessionRequestCallback.timeout(AbstractNIOConnPool.java:822)
    at org.apache.http.impl.nio.reactor.SessionRequestImpl.timeout(SessionRequestImpl.java:183)
    at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processTimeouts(DefaultConnectingIOReactor.java:210)
    at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvents(DefaultConnectingIOReactor.java:155)
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:348)
    at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.execute(PoolingNHttpClientConnectionManager.java:192)
    at org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase$1.run(CloseableHttpAsyncClientBase.java:64)
    at java.lang.Thread.run(Unknown Source)

我感到非常绝望，并且很不了解所发生的事情，如果有人可以帮助我将不胜感激！

很多家伙

Answer 1

问题终于解决了，端口不是一个好端口，与服务器一起工作的人们告诉我该端口，因为他们更改了该端口并且它直接起作用了；）