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Java.net.SocketTimeoutExceptionを修正：読み取りタイムアウト

Http POSTクライアントからの入力を受け取ってサーバー上の曲に投票するRESTfulサーバーがあります。クライアントにApache HTTPClientを使用しました。

public boolean vote() {
        HttpClient client = new DefaultHttpClient(getHttpParameters());
        HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000); // Timeout Limit                                                                              
        HttpResponse response;
        try {
            HttpPost post = new HttpPost("http://127.0.0.1:8080/ws/");
            StringEntity se = new StringEntity("{ \"song_id\" : \"2\" }");
            se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE,"application/json"));
            post.setEntity(se);
            response = client.execute(post);
            if (response != null) { 
                InputStream in = response.getEntity().getContent(); // Get the data in the Entity                                                               
                String result = convertStreamToString(in);
                return true;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return false;
    }

    public static HttpParams getHttpParameters() {
        HttpParams httpParameters = new BasicHttpParams();
        int timeoutConnection = 30000;
        HttpConnectionParams.setConnectionTimeout(httpParameters,
                timeoutConnection);
        int timeoutSocket = 30000;
        HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
        return httpParameters;
    }

連続して投票ボタンをクリックすると、数回（7〜8回など）投票した後、Java.net.SocketTimeoutException: Read timed out例外。理由を検索したところ、タイムアウト期間にクライアントがサーバーの応答を受け取らなかったためです。ただし、問題は、Chrome =REST ConsoleまたはJMeterのような他のアプリケーションを使用する場合、同じパラメーターを使用して同じサーバーで多くの票を投票できることです。パス。私のJavaコードに問題があります。これを理解するのを手伝ってください。以下は私のスタックトレースです。

Java.net.SocketTimeoutException: Read timed out
    at Java.net.SocketInputStream.socketRead0(Native Method)
    at Java.net.SocketInputStream.read(Unknown Source)
    at org.Apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.Java:166)
    at org.Apache.http.impl.io.SocketInputBuffer.fillBuffer(SocketInputBuffer.Java:90)
    at org.Apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.Java:281)
    at org.Apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.Java:92)
    at org.Apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.Java:62)
    at org.Apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.Java:254)
    at org.Apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.Java:289)
    at org.Apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.Java:252)
    at org.Apache.http.impl.conn.ManagedClientConnectionImpl.receiveResponseHeader(ManagedClientConnectionImpl.Java:191)
    at org.Apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.Java:300)
    at org.Apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.Java:127)
    at org.Apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.Java:715)
    at org.Apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.Java:520)
    at org.Apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.Java:906)
    at org.Apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.Java:805)
    at org.Apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.Java:784)
    at notdefault.ServerStuffs.vote(ServerStuffs.Java:72)
    at notdefault.MainClass.actionPerformed(MainClass.Java:105)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at Java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at Java.awt.Component.processEvent(Unknown Source)
    at Java.awt.Container.processEvent(Unknown Source)
    at Java.awt.Component.dispatchEventImpl(Unknown Source)
    at Java.awt.Container.dispatchEventImpl(Unknown Source)
    at Java.awt.Component.dispatchEvent(Unknown Source)
    at Java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at Java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at Java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at Java.awt.Container.dispatchEventImpl(Unknown Source)
    at Java.awt.Window.dispatchEventImpl(Unknown Source)
    at Java.awt.Component.dispatchEvent(Unknown Source)
    at Java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at Java.awt.EventQueue.access$400(Unknown Source)
    at Java.awt.EventQueue$2.run(Unknown Source)
    at Java.awt.EventQueue$2.run(Unknown Source)
    at Java.security.AccessController.doPrivileged(Native Method)
    at Java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
    at Java.security.AccessControlContext$1.doIntersectionPrivilege(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.AccessControlContext$1.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)
Java.net.SocketTimeoutException: Read timed out
    at Java.net.SocketInputStream.socketRead0(Native Method)
    at Java.net.SocketInputStream.read(Unknown Source)
    at org.Apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.Java:166)
    at org.Apache.http.impl.io.SocketInputBuffer.fillBuffer(SocketInputBuffer.Java:90)
    at org.Apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.Java:281)
    at org.Apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.Java:92)
    at org.Apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.Java:62)
    at org.Apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.Java:254)
    at org.Apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.Java:289)
    at org.Apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.Java:252)
    at org.Apache.http.impl.conn.ManagedClientConnectionImpl.receiveResponseHeader(ManagedClientConnectionImpl.Java:191)
    at org.Apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.Java:300)
    at org.Apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.Java:127)
    at org.Apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.Java:715)
    at org.Apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.Java:520)
    at org.Apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.Java:906)
    at org.Apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.Java:805)
    at org.Apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.Java:784)
    at notdefault.ServerStuffs.vote(ServerStuffs.Java:72)
    at notdefault.MainClass.actionPerformed(MainClass.Java:105)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at Java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at Java.awt.Component.processEvent(Unknown Source)
    at Java.awt.Container.processEvent(Unknown Source)
    at Java.awt.Component.dispatchEventImpl(Unknown Source)
    at Java.awt.Container.dispatchEventImpl(Unknown Source)
    at Java.awt.Component.dispatchEvent(Unknown Source)
    at Java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at Java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at Java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at Java.awt.Container.dispatchEventImpl(Unknown Source)
    at Java.awt.Window.dispatchEventImpl(Unknown Source)
    at Java.awt.Component.dispatchEvent(Unknown Source)
    at Java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at Java.awt.EventQueue.access$400(Unknown Source)
    at Java.awt.EventQueue$2.run(Unknown Source)
    at Java.awt.EventQueue$2.run(Unknown Source)
    at Java.security.AccessController.doPrivileged(Native Method)
    at Java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
    at Java.security.AccessControlContext$1.doIntersectionPrivilege(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.AccessControlContext$1.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)
javapostrestletapache-httpclient-4.x
15
asok Buzz

調査のためのいくつかのポインタ/提案があります

  1. 投票するたびに、新しいHTTP接続を作成するvoteメソッドを呼び出すことがわかります。
  2. これはmight問題になる。単一のHttpClientインスタンスを使用してサーバーに投稿することをお勧めします。この方法では、クライアント側からの接続が多すぎることはありません。
  3. すべての最後で、HttpClientを閉じる必要があるため、httpclient.getConnectionManager().shutdown();を呼び出して、接続で使用されているリソースを解放します。
16
Santosh

応答を得るだ​​けでは不十分だと思います。読む必要があると思います（エンティティを取得し、 EntityUtils.consume（） を使用して読み取ります）。

例えば（ドキュメントから）

     System.out.println("<< Response: " + response.getStatusLine());
     System.out.println(EntityUtils.toString(response.getEntity()));
2
Brian Agnew