fix java.net.SocketTimeoutException: Read time out

Possiedo un server RESTful che accetta un input HTTP POST dal client per votare i brani sul server. Ho usato Apache HTTPClient per client.fix java.net.SocketTimeoutException: Read time out

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; 
    }

Quando clicco pulsante di voto in successione, dopo pochi voti (come 7-8), ottengo java.net.SocketTimeoutException: Read timed out eccezione. Quando ho cercato il motivo, ho scoperto che questo è dovuto al fatto che il client non ha ricevuto risposta del server durante il periodo di timeout. Ma il problema è che quando uso altre applicazioni come Chrome REST Console o JMeter, posso votare un sacco di voti sullo stesso server con gli stessi parametri e percorso. C'è qualche problema con il mio codice Java. Per favore aiutami a capirlo. Di seguito è riportato il mio stacktrace:

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)

fonte

2013-08-04 asok Buzz

Se si imposta un timeout di lettura e si ottiene un timeout di lettura e non si desidera un timeout di lettura, aumentare il timeout di lettura. Sta succedendo solo perché l'hai chiesto. Se pensi che il server dovrebbe essere più veloce di quello che è, prendilo con loro. – EJP

Ho provato ad aumentare anche il timeout di lettura, ma prima o poi mi sono imbattuto in quel problema. In realtà mi ero dimenticato di chiudere le connessioni, quindi mantenere attive le connessioni desiderate e consumare le risorse del server. Risposta di @Santosh di seguito ha aiutato molto. –

Qui ci sono alcune indicazioni/suggerimenti per le indagini

vedo che ogni volta che si vota, vi invito vote metodo che crea una connessione HTTP fresca.
Questo potrebbe essere essere un problema. Vorrei suggerire di utilizzare una singola istanza HttpClient da inviare al server. In questo modo non creerà troppe connessioni dal lato client.
Alla fine di tutto, HttpClient deve essere chiuso e quindi chiamare httpclient.getConnectionManager().shutdown(); per rilasciare le risorse utilizzate dalle connessioni.

fonte

2013-08-04 14:31:25 Santosh

Grazie amico, hai reso la mia giornata. Ho interrotto la connessione all'ultimo e mi ha aiutato molto. –

Non credo sia sufficiente solo ottenere la risposta. Penso che sia necessario leggerlo (prendere l'entità e leggerlo tramite EntityUtils.consume()).

ad es. (Dal doc)

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

fonte

2013-08-04 13:46:00

In realtà ce l'ho, ho solo cercato di farla breve. Modificherò la mia domanda. Grazie. –

fix java.net.SocketTimeoutException: Read time out

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