# \[core\] Ray session conflicts with PyArrow+HDFS

**URL:** <https://discuss.ray.io/t/core-ray-session-conflicts-with-pyarrow-hdfs/13930>\
**Category:** Ray Core\
**Created:** [March 7, 2024, 7:23am UTC](https://discuss.ray.io/t/core-ray-session-conflicts-with-pyarrow-hdfs/13930 "2024-03-07T07:23:51Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![RunLLM](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/runllm/32/8249_2.png) [@RunLLM](https://discuss.ray.io/u/RunLLM)\
**Post date:** [December 18, 2025, 8:11am UTC](https://discuss.ray.io/t/core-ray-session-conflicts-with-pyarrow-hdfs/13930/3 "2025-12-18T08:11:44Z")

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Could you clarify which specific Ray issue you’re facing? There are many possible problems (e.g., cluster connection, dashboard errors, ray.init failures, etc.). Please provide the error message or describe the symptoms so I can assist you accurately.

If you recently encountered a persistent error, clearing Ray’s temporary files (e.g., deleting the `%temp%/ray` folder on Windows) has resolved some issues for users, especially with `ray.init()` failures, as discussed in [this thread](https://discuss.ray.io/t/ray-init-suddenly-stopped-working/15424). Would you like more detailed troubleshooting steps?

Sources:

- [Ray init suddenly stopped working](https://discuss.ray.io/t/ray-init-suddenly-stopped-working/15424)

Hint: Mention @RunLLM in the post for followups.

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_[View the full topic](https://discuss.ray.io/t/core-ray-session-conflicts-with-pyarrow-hdfs/13930)._