JAX GPU Test aborts in `PyDatasetAdapter` if `multiprocessing=True`

[sampathweb]

Repro steps in Colab Pro with GPU enabled terminal:

pip install -U tensorflow  # Update TF to 2.13
git clone https://github.com/keras-team/keras-core.git
cd keras-core

KERAS_BACKEND=jax pytest keras_core --ignore keras_core/applications

This will abort at 98% in test - PyDatasetAdapterTest when it runs with multiprocessing=True option.

Buf when its running the test independently or even at higher level folders it doesn't abort. Also, it doesn't abort for TensorFlow or Torch backends. I am not sure why it aborts only for JAX GPU when running the entire test suite. May be multiprocessing with pytest doesn't play well with XLA / JAX / Cuda?

[fchollet]

Multiprocessing in Python is pretty broken in general, so I wouldn't be surprised if there's some weird interaction going on.