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  1. Qt
  2. QTBUG-46552

QUdpSocket: readyRead() stops firing

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Details

    • Bug
    • Resolution: Done
    • P1: Critical
    • 5.5.1, 5.6.0
    • 5.4.2, 5.5.0 Beta, 5.5.0 RC, 5.5.0
    • Network: Sockets
    • None
    • windows, linux
    • 378e26dd14df808a55471330400984841ef414d4 a6ec869211d67fed94e3513dc453a96717155121 c86ca601edfde6e7b6a0769903d86bd48e26d70d

    Description

      Since Qt 5.4.2, readyRead() stops firing when things get busy. Given the right busy conditions, this always happens. Simple demo main.cpp attached. Apparently a regression introduced by commit a4c837b3a1168ab07415501f141395dfffc3ed18.

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        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-47860 QUdpSocket stops emitting readyRead signal

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          is required for

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-46863 Issues to be fixed before Qt 5.5.1

          • 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
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-48326 Race condition when multiple network requests are open, and the remote socket is closed prematurely

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          replaces

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-48087 [REG 5.3.2->5.5.0] QUdpSocket stops emitting readyRead() signals under heavy Udp traffic

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          resulted in

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-48299 Windows/[REG 5.5.0->5.5.1] Qt Quick1 tests\auto\declarative\qdeclarativetextedit::delegateLoading() fails

          • P0: Blocker - MUST be fixed ASAP. This includes issues that prevent/block further Qt development; Legal issues & Serious data loss issues.
          • Closed
          For Gerrit Dashboard: QTBUG-46552
          # Subject Branch Project Status CR V
          105969,13 QUdpSocket: avoid infinite read notifier blocking 5.5 qt/qtbase Status: MERGED +2 0
          114420,1 WIP: Fix QUdpSocket readyRead()/hasPendingDatagrams() race condition. 5.4 qt/qtbase Status: ABANDONED -2 0
          114845,2 Fix QUdpSocket readyRead()/hasPendingDatagrams() race condition. 5.5 qt/qtbase Status: ABANDONED -2 0
          123205,9 Fix the spurious socket notifications under Windows 5.5 qt/qtbase Status: MERGED +2 0
          123998,5 Windows socket engine: do not discard datagram on critical failure 5.5 qt/qtbase Status: MERGED +2 0

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            People

              alex1973tr Alex Trotsenko
              mabrand Mark Brand
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              Dates

                Created:
                Updated:
                Resolved: