Memory Error: IOStream.Flush timed out

Hi,

I was running a long session on Jupyter notebook. I mistakenly ran a function with no variables and the kernel got stuck. After a while, I saw the error: Memory Error., IOStream.Flush timed out
When I checked the OS task manager, there was sufficient memory present. What's weird is the kernel got stuck at a simple function call with no variables (something like do_something() )
Anyone has any idea how this might have occurred and what's the best way to avoid the same in the future (I lost 10-12 hours of work due to this error)
TIA