QTcpServer中的incomingConnection函数不执行

之前一个QT socket程序在升级系统后，突然没办法正常工作了。用socket client测试程序，能够连接上tcp server。但是QTcpServer中的incomingConnection函数没有被触发执行。同样的代码在debian7上和windows上都可以执行，但是在debain8就不能正常工作。后来发现，虚函数的incomingConnection的函数参数改变了，有void TripServer::incomingConnection(int socketId) 变成了void TripServer::incomingConnection(qintptr socketId)。参数类型不同，所以函数定义也就不同了。将参数类型有int改成qaintptr就好了。好贱的问题呀。附上server代码

#include "chat_server.h"
#include "my_socket.h"
#include <QHostAddress>

ChatServer::ChatServer( QObject *parent /* = NULL */ )
    : QTcpServer( parent )
{
    _mysockets.empty();
}


ChatServer::~ChatServer()
{
    qDeleteAll( _mysockets );
    _mysockets.clear();
}

void ChatServer::Run( quint16 port )
{
    if( !this->listen(QHostAddress::Any, port) )
        printf( "ChatServer listen failed !" );

}


void ChatServer::sendData(QString string){
    printf( "client data to all client!\n" );

    QList<MySocket*>::iterator iter;
    for( iter = _mysockets.begin(); iter != _mysockets.end(); iter++ ) {
        if((*iter)->isOpen())
        {
            (*iter)->write(qPrintable(string),string.length());
        }
    }

}

void ChatServer::sendData(QByteArray string){
    printf( "client data to all client!\n" );

    QList<MySocket*>::iterator iter;
    for( iter = _mysockets.begin(); iter != _mysockets.end(); iter++ ) {
        if((*iter)->isOpen())
        {
            (*iter)->write(string,string.length());
        }
    }

}

/*void ChatServer::incomingConnection( int handle )*///修改之前
void ChatServer::incomingConnection( qintptr handle )//修改之后
{
    printf( "incomingConnection(): %d !\n", handle );
    MySocket *mysocket = new MySocket( this );
    mysocket->setServer(this);
    mysocket->setSocketDescriptor( handle );
    connect( mysocket, SIGNAL(disconnected()), this, SLOT(clientDisconnected()) );
    _mysockets.append( mysocket );
}

void ChatServer::clientDisconnected()
{
    printf( "client disconnected !\n" );
    QList<MySocket*>::iterator iter;
    for( iter = _mysockets.begin(); iter != _mysockets.end(); iter++ ) {
        if( -1 == (*iter)->socketDescriptor() ) {
            _mysockets.erase( iter );
            return;
        }
    }
}