[Interest] Issue with concurrent QNetworkRequests

Mike Chinander chinander at gmail.com
Tue Sep 26 21:03:07 CEST 2017

Why can't you use only one QNetworkAccessManager instance for your

On Tue, Sep 26, 2017 at 1:55 PM, Jani Tykka <jtykka at broadsoft.com> wrote:

> Hi,
> I'd ask if the following issues would ring anyones bells, before I start
> doing more deeper investigation and create test application to reproduce
> the issue. Basically the issue in our application is reproduced following
> way.
> 1. Have 1 big download (https) 100MB (It uses own QNam instance)
>  - file is being written from the data got from QNetworkReply::readyRead
> 2. During the download execute other requests (https) using different QNam
> instance
> What is experienced that if during download other requests are executed
> the data received from readyRead contains extra bytes in the middle of
> chunked responses. It can be that the total file size received grows to
> 120MB. Those extra bytes are always zeros.
> If there are no other request executed at the same time the download will
> always be successful. This issue is only reproducible on Windows, not on
> MacOS. There is no code relation (other than inside Qt) on those modules
> where concurrent requests are being made.
> Any help or ideas on this are warmly welcome, thanks.
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