error: losetup: /dev/loopN: detach failed: No such device or address

[kzys]

TestSnapshotterSuite was sometimes failed with the following message;

    --- FAIL: TestSnapshotterSuite/StatComitted (11.74s)

        log_hook.go:40: time="2019-11-12T00:29:06.306176187Z" level=info msg="creating naive snapshotter" root=/tmp/snapshot-suite-Snapshotter-658870413/root

        log_hook.go:40: time="2019-11-12T00:29:06.308447613Z" level=debug msg=prepare key=/tmp/snapshot-suite-Snapshotter-658870413/work/preparing parent=

        log_hook.go:40: time="2019-11-12T00:29:06.321979643Z" level=info msg="creating new image of size 1024 MB" image=/tmp/snapshot-suite-Snapshotter-658870413/root/images/1

        log_hook.go:40: time="2019-11-12T00:29:06.322512247Z" level=info msg="building file system" image=/tmp/snapshot-suite-Snapshotter-658870413/root/images/1

        log_hook.go:40: time="2019-11-12T00:29:10.946255850Z" level=debug msg=commit key=/tmp/snapshot-suite-Snapshotter-658870413/work/preparing name=/tmp/snapshot-suite-Snapshotter-658870413/work/committed

        log_hook.go:40: time="2019-11-12T00:29:15.152856934Z" level=debug msg=stat key=/tmp/snapshot-suite-Snapshotter-658870413/work/committed

        helpers_unix.go:32: unmount /tmp/snapshot-suite-Snapshotter-658870413/work/preparing

        testsuite.go:101: Cleanup failed: losetup --detach /dev/loop21

            error: losetup: /dev/loop21: detach failed: No such device or address

            

            : exit status 1

(from https://buildkite.com/firecracker-microvm/firecracker-containerd/builds/1081#e48d3a88-587a-4b40-843e-1801b96e9ed5/1288-1312)

[kzys]

Another one

https://buildkite.com/firecracker-microvm/firecracker-containerd/builds/1131#b85aed8c-c18f-4da3-9887-3325435c60fa/315-402

[kzys]

We have removed snapshotters from our repos (#344), including this test.