Unnatural Early termination of episodes with java.lang.StackOverflowError message

[hitzkrieg]

I observed some problematic episodes from RunHistory files while training DRRN models on many tasks for simplification_str="". I am attaching handful episodes from Task20
task20_problematic_episodes.txt

There are many instances when the episodes terminate prematurely (isComplete=1) with a score of -1, without a logical reason.
They are accompanied by a java.lang.StackOverflowError message in the freelook, inventory, observation entries.

This seems to happen in runs when with simplification_str="", but not when with simplification_str="easy".

[PeterAJansen]

Dear @hitzkrieg ,

Thanks for this report. This may be due to an issue with ScienceWorld -- it was tested extensively with the "easy" simplification flag, but it's possible that a randomly exploring agent like the DRRN might have uncovered a bug that's not present in the "easy" version of the game. I will put it on my TODO list to investigate this -- if you have any more reports from other tasks, please attach them. Right now it looks like it's limited to a small selection of cases where the electrical connection action is being used?

thanks,
Peter

[hitzkrieg]

I was training on a handful of tasks, and here are two tasks 13, and 20 where I encountered such logs:
https://drive.google.com/drive/folders/1djeLJjt99VY74h3egIbIufB25bqgH2g_?usp=sharing

Yes, it looks like these errors crop up during or after an electrical connection action.

[MarcCote]

@hitzkrieg can you try allenai/ScienceWorld#41 and see if that solves the issue for you?