# Ray client: Can't pickle custom serialized object

**URL:** <https://discuss.ray.io/t/ray-client-cant-pickle-custom-serialized-object/4901>\
**Category:** Ray Client\
**Created:** [February 2, 2022, 11:22pm UTC](https://discuss.ray.io/t/ray-client-cant-pickle-custom-serialized-object/4901 "2022-02-02T23:22:18Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![toza-mimoza](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/toza-mimoza/32/2040_2.png) [@toza-mimoza](https://discuss.ray.io/u/toza-mimoza)\
**Post date:** [February 3, 2022, 1:01pm UTC](https://discuss.ray.io/t/ray-client-cant-pickle-custom-serialized-object/4901/2 "2022-02-03T13:01:46Z")

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Hi @mmuru ,

my post was hidden but reinstated today and I had exact the problem: [[Dask on Ray] Parallelizing Rasa's DaskGraphRunner - Problem with serializing SQLAlchemy objects](https://discuss.ray.io/t/dask-on-ray-parallelizing-rasas-daskgraphrunner-problem-with-serializing-sqlalchemy-objects/4798)

I needed to write custom serializers that omit serializing the DB connections because they are not serializable.

What you also probably need is to check serializability with inspect\_serializability function ([Serialization — Ray v1.9.2](https://docs.ray.io/en/latest/serialization.html)).

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_[View the full topic](https://discuss.ray.io/t/ray-client-cant-pickle-custom-serialized-object/4901)._