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  1. Qt
  2. QTBUG-52449

Bound QUdpSocket leads into high CPU usage with waitForReadyRead(int msecs)

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Details

    • Bug
    • Resolution: Done
    • P1: Critical
    • 5.6.1
    • 5.6.0
    • Network: Sockets
    • None
    • 21b3e2265a06a6bf45ef63f7da3b9dc609c47c31

    Description

      https://github.com/qtproject/qtbase/commit/0db793fe4117c243361d4b8eff4fb5ab87f66020#commitcomment-17011081

      In case of a bound QUDPSocket waitForReadyRead(int msecs) returns immediately although there are no datagrams received and the timeout is not elapsed. In Qt 5.5 the method blocked when no datagrams were received for msecs milliseconds. Developers who relied on the timeout will experience a high CPU usage.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-52714 [REG 5.5->5.6] Network/sockets tests regressing (tst_QUdpSocket, mostly)

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported
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              alex1973tr Alex Trotsenko
              qtproject.tr4 Thorsten Hojnacki
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              Dates

                Created:
                Updated:
                Resolved:

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