ElasticSearch客戶端連接無法

Question

我在使用ElasticSearch Client時遇到問題。

我設計了一個Java應用程序（以完成開發人員研究），該應用程序管理不同的數據庫MySQL，mongoDb和ElasticSearch。 我能夠讀取，創建並將數據庫中的數據更新到另一個數據庫。 所有內容均使用本地數據庫進行設計和編碼，並且一切正常。 所有測試均已通過驗證，因此我們決定使其在實際數據庫上的遠程服務器上運行。

然后問題開始發生，尤其是自從兩天以來一直困擾我的問題，我變得非常絕望。

• 使用TransportClient，它可以在本地運行，但是在真實服務器上，它會帶來NoNodeAvailableException，表明沒有已配置的節點可用。 嘗試了很多事情以使其起作用，但沒有成功。

• 因此，我決定嘗試使用REST進行連接和請求。 這是我的代碼，我得到的錯誤不是很詳細：這是一個ConnectException。

代碼：

    // 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;
    }   

這是我得到的例外：

    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)

我感到非常絕望，並且很不了解所發生的事情，如果有人可以幫助我將不勝感激！

很多家伙

Answer 1

問題終於解決了，端口不是一個好端口，與服務器一起工作的人們告訴我該端口，因為他們更改了該端口並且它直接起作用了；）