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FileExistsError when using on_disk_cache and multiple workers #1186

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knoriy opened this issue Jun 16, 2023 · 1 comment
Open

FileExistsError when using on_disk_cache and multiple workers #1186

knoriy opened this issue Jun 16, 2023 · 1 comment

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@knoriy
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knoriy commented Jun 16, 2023

🐛 Describe the bug

When multiple workers try to create a folder structure at the same time it fails and raises FileExistsError.

Expected behavior: create folder structure and continue

torchdata.datapipes.iter.IterableWrapper(urls)\
        .on_disk_cache(filepath_fn=filepath_fn)\
        .open_files_by_fsspec(mode='rb')\
        .end_caching(filepath_fn=filepath_fn)
        
dl = DataLoader(datapipe, batch_size=16, num_workers=96, persistent_workers=True)

Versions

torchdata==0.6.1

@knoriy
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knoriy commented Jun 16, 2023

I've opened a pull request which fixes this issue

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