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  1. Qt
  2. QTBUG-116856

Using `QProcess::startDetached()` keeps Zygote processes around after application quits

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P3: Somewhat important P3: Somewhat important
    • None
    • 6.5.2
    • WebEngine
    • None
    • Linux/X11
    • daf13fea1 (112-based), 96a787417 (122-based)

      With something like:

      #include <QtWidgets/QApplication>
#include <QtWebEngineWidgets/QWebEngineView>
#include <QtCore/QProcess>
#include <QtCore/QTimer>

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);
    QWebEngineView view;
    view.load(QUrl("https://qt.io"));
    view.show();

    QProcess::startDetached("qtcreator");
    QTimer::singleShot(5000, &app, &QApplication::quit);
    return app.exec();
}

      The following processes will stick around after the application has exited:

      /usr/lib/qt6/QtWebEngineProcess --type=zygote --no-zygote-sandbox --application-name=qtbug-zygote --webengine-schemes=qrc:sV --lang=en
/usr/lib/qt6/QtWebEngineProcess --type=zygote --application-name=qtbug-zygote --webengine-schemes=qrc:sV --lang=en

      Only when the subprocess (e.g. Qt Creator) quits, those stray Zygote processes exit as well.

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            pvarga Peter Varga
            the compiler Florian Bruhin
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              Created:
              Updated:
              Resolved:

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