interrupted system call error while cloning repository in gcsfuse mounted directory

[Pardeep009]

Hi Team.

I have mounted a gcs bucket on a directory in my ubuntu gce using gcsfuse.
gcsfuse -o allow_other --gid=XXX --uid=XXX <gcs-name> <directory>
where gid and uid are values of a user, which will also have access to this shared directory. The clone command used to clone the repository is git clone --branch <branch-name> --depth=1 --single-branch <repo-path> <destination-path>, but it fails with error

fatal: cannot create directory at '<path>': Interrupted system call

though it did downloaded some of the content from repository but keeps on failing every-time at different-different paths.

While running gcsfuse in debugging mode using flags --debug_fuse --debug_gcs, the error captured is

gcs: Req            0x3c7: -> StatObject("<a-file-path-in-repository>") (10.194465ms): Error in fetching object attributes: context canceled
FlushFile: interrupted system call, FileInode.Sync: StatObject: Error in fetching object attributes: context canceled
fuse_debug: Op 0x000033a0        connection.go:500] -> Error: "interrupted system call"
fuse: *fuseops.FlushFileOp error: interrupted system call

I am currently running on Ubuntu 20:04 and gcsfuse version 0.42.2 (Go version go1.19.5).
Kindly help.

[vadlakondaswetha]

This is a known issue with FUSE filesystem. There is no official support provided for gcsfuse when used with other tools like git clone.

The interrupts are coming from the kernel and has nothing to do with GCSFuse. It would be good if you can run gcsfuse with strace and see why the kernel is throwing interrupts intermittently.
Ref existing issues: #288
#402

[Pardeep009]

I tried running with strace -f command and searched for interrupted keyword in the logs and found

[pid 79356] write(2, "FlushFile: interrupted system ca"..., 118 <unfinished ...>
[pid 79345] futex(0xc00045bd48, FUTEX_WAKE_PRIVATE, 1FlushFile: interrupted system call, FileInode.Sync: StatObject: Error in fetching object attributes: context canceled
 <unfinished ...>
[pid 79354] <... futex resumed>)        = 0
[pid 79345] <... futex resumed>)        = 1
[pid 79356] <... write resumed>)        = 118
[pid 79354] futex(0xc00045bd48, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 79356] futex(0xc00045bd48, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
[pid 79354] <... futex resumed>)        = -1 EAGAIN (Resource temporarily unavailable)
[pid 79345] nanosleep({tv_sec=0, tv_nsec=20000},  <unfinished ...>
[pid 79356] <... futex resumed>)        = 0
[pid 79354] nanosleep({tv_sec=0, tv_nsec=3000},  <unfinished ...>
[pid 79356] write(2, "fuse: *fuseops.FlushFileOp error"..., 58fuse: *fuseops.FlushFileOp error: interrupted system call
) = 58
[pid 79354] <... nanosleep resumed>NULL) = 0

[pid 79356] write(2, "MkDir: interrupted system call, "..., 330MkDir: interrupted system call, CreateChildDir: error in closing writer : Post "https://storage.googleapis.com/upload/storage/v1/b/<bucket-name>/o?alt=json&ifGenerationMatch=0&name=<any-folder-path>&prettyPrint=false&projection=full&uploadType=multipart": context canceled
 <unfinished ...>
[pid 79345] nanosleep({tv_sec=0, tv_nsec=20000},  <unfinished ...>
[pid 79356] <... write resumed>)        = 330
[pid 79356] futex(0xc00045b148, FUTEX_WAKE_PRIVATE, 1) = 1
[pid 79353] <... futex resumed>)        = 0
[pid 79345] <... nanosleep resumed>NULL) = 0
[pid 79356] write(2, "fuse: *fuseops.MkDirOp error: in"..., 54fuse: *fuseops.MkDirOp error: interrupted system call
 <unfinished ...>
[pid 79353] futex(0xc00045b148, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>

[Mistic92]

We have encountered this error today too. @Pardeep009 have you found any solution?

[Pardeep009]

@Mistic92 I have found no solution as of now, btw just curious which use case are you trying to implement ?
since we shifted to some other central storage solution(NFS) for our use case.