s3fs: unable to access MOUNTPOINT /mnt/bucket/: Transport endpoint is not connected

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Category:: ontap-9

Specialty:: NAS

Last Updated:

Applies to

ONTAP 9
ONTAP object store server
ONTAP S3 bucket
Linux
s3fs

Issue

Linux host tries to use the s3fs client application to mount an ONTAP S3 bucket to mountpoint /mnt/bucket/, but gets error s3fs: unable to access MOUNTPOINT /mnt/bucket/: Transport endpoint is not connected

root@hostname:~ # s3fs rdc-cribl-s3 /mnt/bucket/ -o passwd_file =~ /.passwd-s3fs -o url=http://contoso.com/ -o no_check_certificate -o dbglevel=info -f -o
curldbg -o allow_other -o use_path_request_style
2025-02-27T14:08:26.722Z [INF] s3fs version 1.93(unknown) : s3fs -o passwd_file=/root/.passwd-s3fs -o url=http://contoso.com/ -o no_check_certificate -o
dbglevel=info -f -o curldbg -o allow_other -o use_path_request_style rdc-cribl-s3 /mnt/bucket/
2025-02-27T14:08:26.722Z [CRT] s3fs_logger.cpp:LowSetLogLevel(239): change debug level from [CRT] to [INF]
s3fs: unable to access MOUNTPOINT /mnt/bucket/: Transport endpoint is not connected
root@hostname:~ #

The same error happens when trying to use chmod on /mnt/bucket/

root@hostname:/mnt/tst# chmod 777 /mnt/bucket
chmod: cannot access '/mnt/bucket': Transport endpoint is not connected

/mnt/bucket/ is not listed in the output of df -h

root@hostname:/mnt/tst# df -h
df: /mnt/bucket: Transport endpoint is not connected

/mnt/bucket/ is listed in the output of mount

root@hostname:/mnt/tst# mount | grep bucket
s3fs on /mnt/bucket type fuse. s3fs (rw, nosuid, nodev, relatime, user_id=0,group_id=0)
root@hostname:/mnt/tst# s3fs rdc-cribl-s3 /mnt/tst/ -o passwd_file=/root/.passwd-s3fs -o url=http://contoso.com/ -o no_check_certificate -d -o enable_un
signed_payload

Packet trace shows that the Linux host is not sending a connection request to ONTAP