# Working with Graph Neural Networks (Varying State Space)

**URL:** <https://discuss.ray.io/t/working-with-graph-neural-networks-varying-state-space/5730>\
**Category:** RLlib\
**Created:** [April 8, 2022, 11:17pm UTC](https://discuss.ray.io/t/working-with-graph-neural-networks-varying-state-space/5730 "2022-04-08T23:17:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![etekin](https://avatars.discourse-cdn.com/v4/letter/e/5e9695/32.png) [@etekin](https://discuss.ray.io/u/etekin)\
**Post date:** [April 8, 2022, 11:17pm UTC](https://discuss.ray.io/t/working-with-graph-neural-networks-varying-state-space/5730/1 "2022-04-08T23:17:38Z")

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**How severe does this issue affect your experience of using Ray?**

- High: It blocks me to complete my task.

I have a varying state space in my environment and my model includes GNNs. Comparing to other NNs, batching process is different in GNNs and i wonder how can make it work with Rllib.

All answers are appreciated. Best.

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**Author:** ![avnishn](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/avnishn/32/1544_2.png) [@avnishn](https://discuss.ray.io/u/avnishn)\
**Post date:** [April 11, 2022, 11:06pm UTC](https://discuss.ray.io/t/working-with-graph-neural-networks-varying-state-space/5730/2 "2022-04-11T23:06:01Z")

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tagging @gjoliver here