# Processes is in S state (interruptible sleep)

**URL:** <https://discuss.pytorch.org/t/processes-is-in-s-state-interruptible-sleep/75383>\
**Category:** Uncategorized\
**Created:** [April 5, 2020, 12:40am UTC](https://discuss.pytorch.org/t/processes-is-in-s-state-interruptible-sleep/75383 "2020-04-05T00:40:59Z")\
**Posts on this page:** 1\
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**Author:** ![ptrblck](https://discuss.pytorch.org/user_avatar/discuss.pytorch.org/ptrblck/32/1823_2.png) [@ptrblck](https://discuss.pytorch.org/u/ptrblck)\
**Post date:** [April 5, 2020, 7:07am UTC](https://discuss.pytorch.org/t/processes-is-in-s-state-interruptible-sleep/75383/4 "2020-04-05T07:07:36Z")

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The error might come from an interaction of multiprocessing with any other lib such as `lmdb` or `hdf5`.  
I’m nut sure, which approach your `DataLoader` takes at the moment, but also have a look at [this thread](https://discuss.pytorch.org/t/dataloader-when-num-worker-0-there-is-bug/25643/5), where some issues regarding `hdf5` were discussed.

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