Python error unknown: thread pool destructor

Question

I am using python and am getting a very odd error I can't seem to find anywhere. It has to do with the libgomp library and threading. The error is:

libgomp: could not create thread pool destructor.

The odd thing is that the error occurs after a certain amount of time/processes. It does not happen in a certain line of my code. The code I am running is an iterative solver and as such, I can control the amount of time the code runs very easily by relaxing the tolerances. Right now if I set the tolerances so that everything "converges" in ~9 iterations (about 15s) then the code completes just fine. If I increase it to >9 then I get the error. It clearly is not a problem with one part of the code as it happens in different parts every time and there is no traceback info.

Any ideas?

Answer 1

Strange. That error is only raised when pthread_key_create fails in [GCC]/libgomp/team.c:initialize_team, which is an __attribute__((constructor)) function, only called (once!) at process/libgomp initialization. So, either your process is doing "strange things" with dlopening libgomp (multiple times?), or you're running into some resource shortage/limitation at the OS level. Or, a libpthread (glibc) bug. Can you find any other reports of pthread_key_create failures for your OS/software distribution?