problem with automounted davfs

[WarheadsSE]

Hi,

on my RaspPi I've installed davfs2 and automount in order to store some files periodically on a webdav server. When accessing the mount-point for the first time it works fine, e.g. ls-command will show the files and folders on the webdav-server.

After waiting some time the same ls-command will stall and can't even be killed from another window! Maybe this occurs after the system has tried to unmount the mount-point due to inactivity. Also access to other mounted devices (e.g. smb-share on a local NAS) seems to be disturbed after this event.

The only hint I can find are some entries in the syslog, which indicate that also fuse might be involved although I've done every access from the root-account.

Any idea what might be wrong? Do I need special mount-options for automounting webdav-shares?

BR
HP


syslog entries (the "06:58:03"-messages will be repeated exactly every 2 minutes)
please note: this is the physical sequence in the syslog file, the timestamps are unreliable (maybe due to systemd?)
$this->bbcode_second_pass_code('', '
Oct 27 09:03:32 mars systemd[1]: Started User Manager for UID 1000.
Jan 1 06:48:01 mars kernel: fuse init (API version 7.22)
Oct 27 09:04:50 mars systemd[1]: Mounted FUSE Control File System.
Jan 1 06:58:03 mars kernel: umount D c05d3d48 0 14295 14294 0x00000001
Jan 1 06:58:03 mars kernel: [<c05d3d48>] (__schedule+0x290/0x5ec) from [<bf233a58>] (__fuse_request_send+0x14c/0x358 [fuse])
Jan 1 06:58:03 mars kernel: [<bf233a58>] (__fuse_request_send+0x14c/0x358 [fuse]) from [<bf238350>] (fuse_do_getattr+0xcc/0x234 [fuse])
Jan 1 06:58:03 mars kernel: [<bf238350>] (fuse_do_getattr+0xcc/0x234 [fuse]) from [<bf239218>] (fuse_update_attributes+0x90/0x98 [fuse])
Jan 1 06:58:03 mars kernel: [<bf239218>] (fuse_update_attributes+0x90/0x98 [fuse]) from [<c010aedc>] (vfs_getattr_nosec+0x2c/0x40)
Jan 1 06:58:03 mars kernel: [<c010aedc>] (vfs_getattr_nosec+0x2c/0x40) from [<c010b13c>] (vfs_fstatat+0x58/0x98)
Jan 1 06:58:03 mars kernel: [<c010b13c>] (vfs_fstatat+0x58/0x98) from [<c010b69c>] (SyS_stat64+0x14/0x30)
Jan 1 06:58:03 mars kernel: [<c010b69c>] (SyS_stat64+0x14/0x30) from [<c000e0e0>] (ret_fast_syscall+0x0/0x30)
')
versions:
davfs2 1.5.2-1
autofs 5.1.0-2

As entry in the autofs-Konfiguration I'm using
$this->bbcode_second_pass_code('', '
1und1 -fstype=davfs https://sd2dav.1und1.de
')