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  1. Qt
  2. QTBUG-58275

QNetworkAccessManager cancels all requests after switching WiFi off/on

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Done
    • Affects Version/s: 5.7.1, 5.8.0 RC
    • Fix Version/s: 5.9.4
    • Component/s: Network
    • Labels:
      None
    • Environment:
      (macOS 10.12.2 / iOS 10.2 (different iOS versions also)), Xcode 8.2.1, Qt 5.7.1 / 5.8 RC

      Description

      I have problems with QNetworkAccessManager on both macOS and iOS.
      After disabling network access (i.e. turning wifi off) and re-enabling it after some time (20-30 seconds) the QNetworkAccessManager will not get network access at all.

      It happens quite often if the time when the network access is really down is longer.

      I think the problem itself might be in QNetworkConfigurationManager, as sometimes during turning wifi off I see log
      QObject::disconnect: Unexpected null parameter and shortly after that all request will fail, even if "the real access" is back.

      I think it's serious bug, as the only working workaround someone told me is to recreate QNetworkConfigurationManager instance(s) - I can do it for my own instances, but what about QML ones? I know about QDeclarativeNetworkAccessManagerFactory, but I don;t think there's a way to force re-creating all QML QNetworkConfigurationManager instances.

      EDIT:
      I've added minimal example project and example output (app was started with WIFI off).

      EDIT2:
      I found a workaround - in such case calling setNetworkAccessible(QNetworkAccessManager::Accessible); brings QNAM back to living world.

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              Assignee:
              tpochep Timur Pocheptsov
              Reporter:
              maciejweglarczyk Maciej Węglarczyk
              Votes:
              3 Vote for this issue
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              11 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

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