QSocketNotifier: socket notifiers cannot be disabled from another thread

[danadam]

I have a code like this

If it is a code, why don't you use [code] tag?

void Client::run()
{
   tcpSocket = new QTcpSocket();

void Client::run()
{
   tcpSocket = new QTcpSocket();

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I assume that Client class is derived from QThread class.Parent object (Client) was probably created in the main thread. Everything that is done in its run() method is executed in another thread. So child object (QTcpSocket) is created in different thread than its parent lives. This is not allowed and that's why you get error:

QObject: Cannot create children for a parent that is in a different thread.

QSocketNotifier: socket notifiers cannot be disabled from another thread

Hm... I'll be guessing here. Your client thread doesn't have an event loop (you're not calling exec() method anywhere in run()). You are waiting for readyRead in client thread, so in fact you are waiting for some signal from QTcpSocket. But it's impossible to receive it in client thread cause it has no event loop.