System.IO.IOException when repeatedly accessing multiple files from multiple threads

Unity: Scripting Runtime

Third Party Issue

2021.3.X

This is .Net standard library behaviour, unrelated to Unity code. Most likely issue is unsafe IO usage in multiple threads.

How to reproduce:
1. Download and open the attached "UnityFileStreamTestForArchive" project
2. Build and run the project on iOS
3. Press the "Start" button
4. Wait for a few minutes and observe the console in the application

Expected outcome: No errors appear
Actual outcome: "System.IO.IOException: Sharing violation on path" error appears

Reproducible with: 2021.3.31f1, 2022.3.11f1, 2023.1.16f1, 2023.2.0b13, 2023.3.0a9
Reproduced on: iPhone 13 Pro 16.1.1, VLNQA00513 - OnePlus Nord N10 5G (BE2029), CPU: Snapdragon 690 SM6350, GPU: Adreno 619, OS: 11 ("System.IO.IOException: Sharing violation on path”, "System.UnauthorizedAccessException: Access to the path” errors)

Not reproduced on:
VLNQA00498 - Google Pixel 7 (Pixel 7), CPU: Google Tensor G2, GPU: Mali-G710, OS: 13
VLNQA00409 - Galaxy Z Fold3 5G (SM-F926B), CPU: Snapdragon 888, GPU: Adreno 660, OS: 11
VLNQA00336 - HUAWEI Y6p (MED-LX9N), CPU: MediaTek MT6762R, GPU: PowerVR Rogue GE8320, OS: 10

System.IO.IOException when repeatedly accessing multiple files from multiple threads

Unity: Scripting Runtime

Third Party Issue

Prioritise and Follow this issue

Have a workaround or additional info about this issue?

System.IO.IOException when repeatedly accessing multiple files from multiple threads

Unity: Scripting Runtime

Statuses

Third Party Issue

Resolution Notes

2021.3.XThird Party IssueThis is .Net standard library behaviour, unrelated to Unity code. Most likely issue is unsafe IO usage in multiple threads.

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?