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Editorial Team
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Asked: 2026-06-01T12:37:36+00:00

On a server running a Qt application I got the following error, as soon

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On a server running a Qt application I got the following error, as soon an other backup job starts running during the night:

QEventDispatcherUNIXPrivate(): Unable to create thread pipe: Too many open files
QEventDispatcherUNIXPrivate(): Can not continue without a thread pipe

Is it possible that the connect function needs a “unix file handle”? For example if I do the following, does it take an additional file handle resource from the OS, until I disconnect?

connect(this, SIGNAL(sendConfig(QString, QString)), deviceCon, SLOT(setDeviceConfig(QString, QString)));
emit sendConfig(configEntry, configValue);
disconnect(this, SIGNAL(sendConfig(QString, QString)), deviceCon, SLOT(setDeviceConfig(QString, QString)));

Thanks.
Spikey

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1 Answer

  1. Editorial Team

    The best I can find on the subject is this reference from QT 4.2.

    The answer to your question would be yes. The Class opens a Pipe creating file handles which are then being used in select to process events.

    P.S. Just confirmed similar method in 4.8

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