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  1. Qt
  2. QTBUG-96900

Infrequent crash using QNetworkAccessManager::get()

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P3: Somewhat important
    • Resolution: Duplicate
    • Affects Version/s: 6.1.2, 6.1.3
    • Fix Version/s: 6.2.0
    • Component/s: Network
    • Labels:
      None
    • Environment:
      Qt v6.1.3 and v6.1.2, MSVC 2019 64-bit, running on Windows 10 v21H1
    • Platform/s:
      Windows

      Description

      Steps to reproduce:

      1. Download Caddy: https://caddyserver.com/
        (I tested with v2.4.5.)
      2. Run an HTTP server for testing:
        caddy.exe file-server
      3. Build and run the attached HTTP client project: 20210927-1018-QNetworkAccessManagerTest.zip.
      4. After around 4,000 consecutive GET requests (about 15 minutes), the application crashes with a read access violation.

      This bug could possibly be a duplicate of QTBUG-38309, however:

      • The other bug specifically says it does not happen on Windows whereas this one does.
      • The other bug points suspicion at OpenSSL whereas this bug uses HTTP.

      Having said that, I tried the same work-around mentioned in QTBUG-38309, changing:

      reply->deleteLater();

      to

      QTimer::singleShot(1000, reply, &QObject::deleteLater);

       and so far (over 13,000 requests / 44 minutes) it has not crashed.

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              Assignee:
              manordheim Mårten Nordheim
              Reporter:
              lidl Damian Lettie
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                Dates

                Created:
                Updated:
                Resolved:

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