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  1. Qt
  2. QTBUG-60882

QWebSocket intra-process connections fail on Windows

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: P3: Somewhat important P3: Somewhat important
    • None
    • 5.7.0, 5.8.0
    • WebSockets
    • None
    • The issue is present on Windows 10, 64-bits, MSVC 2015.

      This issue is not present on Linux (Ubuntu 14.04 & 16.04 tested with Qt 5.7).

      There may also be issues on Mac Sierra, but I have not tested that lately.
    • macOS

      In our unit tests we have a test that sets up QWebSocketServer and then connects to that server, using QWebSockets. These tests routinely fail on Windows 10, even with just two connections.

      The attachment has a minimal sample to reproduce the problem. Running the sample code in two processes, I can create 100 connections and it never fails. Running the code in one process (–combined flag), I cannot get more than 20-30 connections at once, the remaining connections are just left in some weird limbo. See Readme.md in the zip for detailed instructions.

       

        1. TestWebSockets.zip
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            kurt.pattyn Kurt Pattyn
            bug-enthusiast Tommi Ilmonen
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              Updated:

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