Failed on nodejs fs.stat dev

[NoahDragon]

Our program failed on the fs.stat testing case:

It worked in 2 month ago: https://ci.appveyor.com/project/tommy351/hexo/build/469

But since the time of this submission (https://ci.appveyor.com/project/tommy351/hexo/build/470), this issue persists.

We checked our code, where we did have any change related to this issue. Moreover, the dev field in file status is ID of device containing file (ref), and our program won't modify this field.

Any help would appreciate.

[IlyaFinkelshteyn]

Did you try to rebuild that last successful commit? This can happen that it fail too now, and most probably this is because of some external dependencies. If you compare build logs (for the same job in matrix -- nodejs_version=7) from builds 469 and 470, you can notice that a lot of npm dependencies (and even npm itself) are different.

[NoahDragon]

@IlyaFinkelshteyn Thanks, I will take a look at them.

[NoahDragon]

@IlyaFinkelshteyn I have compared those two logs.

Only these three packages are changed, and I don't think these could affect the fs.stat() returns.

Based on my understanding, the device ID should only change when the devices are different. The test case we run is to compare the file status between threads. I think the device ID should be still same. Please correct me if I'm wrong.

[NoahDragon]

The same test case has passed on Travis-CI, but failed on Appveyor. My assumption is some changes on Appveyor cause this issue, maybe multiple threading or container management.

[JLHwung]

This issue can be reproduced in a very simple setup, a living case can be found at https://ci.appveyor.com/project/JLHwung/appveyor-fs-statsync-issue/build/job/s35bs83etb770x34

The testing code is simple and convenient for narrowing down: https://github.com/JLHwung/appveyor-fs-statSync-issue/blob/5153510d1a68bc8682ec8e5c9c9c559fd697d6c3/index.js

[JLHwung]

This issue might not be related to appveyor, see nodejs/node#16496. Suggest closing it.

[FeodorFitsner]

Thanks for the update!