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  1. Qt
  2. QTBUG-20343

QNetworkAccessBackend pointer is NULL when request is done in thread

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Details

    • Bug
    • Resolution: Done
    • P2: Important
    • 4.8.0
    • 4.6.2, 4.7.3, 4.8.0
    • Network
    • None
    • WindowsXP and Windows7
    • 7e662f3727e7c3dd3c41c29ed49bc41d2b66c744, 29495592d27505feff024d574e1333809794c304

    Description

      QNetworkAccessBackend pointer is sometimes NULL with an application that has two threads that issue network request. With the attached application the issue can be reproduced using an invalid url. Sometimes when the application is run the request is started and a correct error message is received: "Host www.ll.m not found". Occasionally the QNetworkAccessBackend pointer is NULL and error message: "Protocol "http" is unknown" is received.

      When there is no backend the message is sent from QNetworkReplyImplPrivate::_q_startOperation().

      The problem does not occur when threads are not used.

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        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-21877 Crash when using 2 QNetworAccessManagers from 2 different threads concurrently

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-22371 Network operation returns ProtocolUnknownError error

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-22107 Crash in QNetworkConfigurationManagerPrivate because of uninitialized member

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
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              shkearns Shane Kearns
              qtcomsupport Qt Support
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              Dates

                Created:
                Updated:
                Resolved:

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