Failed snapshot due to interrupted system call

[julio-lopez]

Backing up a directory in an Azure Files volume (mounted via SMB/CIFS) fails due to interrupted system cal

 unable to process directory "dist": read /www/xx/yy/zz.js: interrupted system call, try --help

Currently trying to narrow down which specific sys call.

cc: @bathina2

[julio-lopez]

The root cause seems to be the same as in restic/restic#2659

[julio-lopez]

golang/go@6b42016

[jkowalski]

It appears that the fix is in Go 1.16. Other than waiting for that, is there much we can do?

[julio-lopez]

golang/go#40846

[julio-lopez]

Dunno, maybe adding wrappers in the mean time that we would undo once 1.16 is out. 1.16 is ~2.5 months out.

[julio-lopez]

Not sure, but this issue may (or may not) also affect reading files from kopia snapshots mounted via FUSE. Needs investigation.

[julio-lopez]

Go 1.16 beta1 is coming out soon. It may be a good idea to test whether this particular issue is resolved with a custom build of kopia.

[julio-lopez]

This should be fixed with #842

[julio-lopez]

Re-opening until it is fully verified.

[julio-lopez]

cc: @pavannd1

[jkowalski]

@julio-lopez can this be closed now?