Cannot stop QTimer from another thread

[John Howe]

I hope this is an easy one. I received an error during shutdown of my app that was roughly "Cannot stop a QTimer from another thread."

I'm not doing anything to deliberately call the Timer->stop() or the Timer->~QTimer() methods from a different thread. Suggestions on how to troubleshoot?

[nagesh]

do you have any timer->stop() in your code?
In which thread QTimer object created? what is the current thread affinity of QTimer object?

[kshegunov]

@John-Howe said in Cannot stop QTimer from another thread:

Suggestions on how to troubleshoot?

Set QT_FATAL_WARNINGS as an environment variable with a value of 1. Run your program in the debuger, when it crashes (which it will at the point of the "Cannot stop a QTimer from another thread." warning) extract a stack trace. Post it here.
That warning usually means that something's not right with your objects' thread affinity.

[anil_arise]

use user define signal instead of direct stop to Qtimer from another thread.