i have simple request method inside simple http client , that QRunnble worker is invoking all the returners of the request are status 0 , what more i spotted after few tests is, when i give the app to run with 1 thread that is
only 1 url to process its working fine and i get status 200 . i suspect something in my http client code is worng and does not support multi thread mode here is my full httpclient code:

this is the code of the request :
Qt Code: 
  1. #ifndef _HttpClient_
  2. #define _HttpClient_
  3. #include <QNetworkAccessManager>
  4. #include <QtNetwork>
  5. #include <QUrl>
  6.  
  7. QT_BEGIN_NAMESPACE
  8. class QSslError;
  9. class QAuthenticator;
  10. class QNetworkReply;
  11. QT_END_NAMESPACE
  12.  
  13. class HttpClient : public QObject
  14. {
  15.      Q_OBJECT   
  16.     public:
  17.         HttpClient(QFile* file,QMutex* mutex);
  18.         ~HttpClient();
  19.          void startRequest(QString& url);
  20.     public slots:
  21.     #ifndef QT_NO_OPENSSL
  22.         void sslErrors(QNetworkReply*,const QList<QSslError> &errors);
  23.     #endif
  24.     private:
  25.         QString m_sUrl;
  26.         QUrl m_url;
  27.         QNetworkAccessManager* m_networkManager;
  28.         QNetworkReply *reply;
  29.         int httpGetId;      
  30.         void HandleNetworkError(QNetworkReply::NetworkError& networkError,
  31.                                 QNetworkReply *networkReply);   
  32. };
  33.  
  34. #endif
  35.  
  36. ------------------------------------
  37.  
  38. #include "HttpClient.h"
  39. #include <QMutexLocker>
  40. #include <QTextStream>
  41.  
  42. HttpClient::HttpClient()
  43. {
  44.      m_networkManager = new QNetworkAccessManager(this);
  45. }
  46. HttpClient::~HttpClient()
  47. {
  48. ;
  49. }
  50.  
  51. void HttpClient::startRequest(QString& url)
  52. {
  53.      QNetworkRequest request;
  54.      request.setUrl(QUrl(url));
  55.      QEventLoop loop;
  56.      reply = m_networkManager->get(request);
  57.      connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
  58.      loop.exec(&#41;;
  59.      LOG_MSG("Is UrlAlive?:"+url.toStdString(&#41;)
  60.      QString ApiResponse;
  61.      QByteArray data=reply->readAll();
  62.      ApiResponse.append(QString::fromUtf8(data));
  63.      int iStatusCodeV =  reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
  64.      if (reply->error()) {
  65.         QNetworkReply::NetworkError networkError = reply->error();
  66.         HandleNetworkError(networkError,reply); 
  67.      }
  68.     QString s = QString::number(iStatusCodeV);
  69.     reply->deleteLater();
  70.     reply = 0;
  71.  
  72. }
  73. void HttpClient::HandleNetworkError(QNetworkReply::NetworkError& networkError,QNetworkReply *networkReply)
  74. {
  75.         if(networkError != QNetworkReply::NoError)
  76.         {
  77.             QString err = networkReply->errorString();
  78.             LOG_MSG("HttpClient::HandleNetworkError:"+err.toStdString());
  79.         }
  80. }
  81. #ifndef QT_NO_OPENSSL
  82. void HttpClient::sslErrors(QNetworkReply*,const QList<QSslError> &errors)
  83. {
  84.  
  85.         reply->ignoreSslErrors();   
  86. }
  87. #endif
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all of this called from QRunnble method that looks like this :

Qt Code: 
  1. void ThreadWorker::run()
  2. {
  3.     QMutexLocker lock(_m);
  4.     startwork();
  5.     lock.unlock();
  6.  
  7.  
  8. }
  9.  
  10. void ThreadWorker::startwork()
  11. {
  12.     m_pHttpClient = new HttpClient();
  13.     //each thread gets unique url
  14.     m_pHttpClient->startRequest(m_url);
  15.  
  16. }
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why its failing all the time?