Omniverse apps crashing when invoking HTTP requests in behavior scripts

Omniverse Developer
1

Hi all,

I’ve tried to invoke some simple HTTP requests from behavior scripts in Omniverse application (tried Create 2022.3.3 and Isaac Sim 2022.2.0) and the result is the crash of the application.

I tried using:

  • request
  • urllib3
  • request with asyncio

In every scenario the result was the crash, so I think it’s a bug or I am missing something.

Thank you so much for your support.

2

Hi @giustino.esposito. I have it a try and I wasn’t able to reproduce the crash. He’s a simple example based on the one you shared with me on Discord:

import requests
from omni.kit.viewport.utility import get_active_viewport_window
import omni.ui as ui
from omni.kit.scripting import BehaviorScript


class NewScript(BehaviorScript):
    def on_init(self):
        print(f"{__class__.__name__}.on_init()->{self.prim_path}")
        self.viewport_window = get_active_viewport_window()
        self.frame= self.viewport_window.get_frame("Super Duper Cool!")

    def on_destroy(self):
        print(f"{__class__.__name__}.on_destroy()->{self.prim_path}")

    def test(self):
        print("Hello")
        a = requests.get("https://google.com")
        print(a.content)

    def on_play(self):
        print(f"{__class__.__name__}.on_play()->{self.prim_path}")
        a = requests.get("https://google.com")
        print(a.content)
        with self.frame:
            with ui.Placer(offset_x=10,offset_y=50):
                with ui.ZStack():
                    with ui.HStack():
                        ui.Button("Test",width=50,height=50, clicked_fn=self.test)
        

    def on_pause(self):
        print(f"{__class__.__name__}.on_pause()->{self.prim_path}")

    def on_stop(self):
        print(f"{__class__.__name__}.on_stop()->{self.prim_path}")
        self.frame.destroy()

    def on_update(self, current_time: float, delta_time: float):
        # print(f"{__class__.__name__}.on_update(current_time={current_time}, delta_time={delta_time})->{self.prim_path}")
        pass

Does this one work for you? I didn’t see you deleting the UI in your example. Not that I destroy the frame in the on_stop() maybe that was it?

3

Hi Mati,

thank you so much for your reply. I will try your code to check if it crashes, one thing I probably didn’t tell you is that the API I am calling is exposed by an extension active on the same Omniverse instance. So the request call is to Omniverse port as “http:127.0.0.1/8111”, probably could be this the problem.

4

Hi @giustino.esposito. Did you have any update on your end? Did my repro work? Do you have some other simple repro I could try? Another way we could go about it is that you can reproduce it and share you crash logs: How to Report an issue with Omniverse