Error warning at the end of headless simulations in SofaPython : PyThreadState_Get: the function must be called with the GIL held

[aleblanc30]

Hi everyone,

I've built a simulation using SofaPython which I run without a gui. At the end of the program, right before it shutdowns, there is an error :

[INFO]    [SofaPython3.Simulation] Sofa.Simulation unload()
[INFO]    [SofaPython3] Clearing Sofa.Core cache...
[INFO]    [SofaPython3.Core] Sofa.Core unload()
[INFO]    [SofaPython3.Helper] Sofa.Helper unload()
[INFO]    [SofaPython3.Simulation] Sofa.Simulation unload()
Fatal Python error: PyThreadState_Get: the function must be called with the GIL held, but the GIL is released (the current Python thread state is NULL)
Python runtime state: finalizing (tstate=0x0000000000e3b710)

This does not result in any issue for my part as I log all the state I need at every time step, but I thought it was worth discussing.

I'll try to create a minimum reproducing example at some point.

In the meantime, if anyone has encountered this issue before, I'd like to hear about it.

[bakpaul]

Hello !

During the last release cycle we've made multiple PR in order to fix an issue that is pretty close :

• import Sofa does not cleanup SofaPython3#429
• [Bindings] Remove static SofaInitializer, call unload into each respective module and clear cache SofaPython3#432
• Add cleanup to core and ensure that the cleanup happens in runSofa SofaPython3#425
• Use PyMem_RawFree when resetting PythonEnvironmentData SofaPython3#447

Which version of SOFA are you using ?