Finder thinks item exists after it's already been deleted (Samba)

Question

First, I copied foo.7z to my SMB share (zfs zpool, Ubuntu 18.04 LTS, Samba 4.7.6) through finder. Over SSH, I moved it elsewhere on the server. I tried copying a different foo.7z again to the same location as the old one, but finder says:

"The operation can’t be completed because an item with the name “foo.7z” already exists."

This is not true, as the file isn't there anymore after I moved it.

Here's my smb.conf on the ubuntu server:

[global]
mangled names = no
dos charset = CP850
access based share enum = yes
unix extensions = no
fruit:aapl = yes
fruit:model = MacPro
unix charset = UTF-8
fruit:resource = xattr
workgroup = WORKGROUP
server string = %h server (Samba, Ubuntu)
dns proxy = no
log file = /var/log/samba/log.%m
max log size = 1000
syslog = 0
panic action = /usr/share/samba/panic-action %d
server role = standalone server
passdb backend = tdbsam
obey pam restrictions = yes
unix password sync = yes
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
pam password change = yes
map to guest = bad user
usershare allow guests = yes

[SMB Share]
 comment = SMB Share
 path = /tank
 browseable = yes
 read only = no
 guest ok = no
 ea support = yes
 vfs objects = catia fruit streams_xattr
 map archive = no
 spotlight = yes
 readdir_attr:aapl_rsize = yes
 readdir_attr:aapl_finder_info = yes
 readdir_attr:aapl_max_access = yes

Using High Sierra 10.13.6.

Answer 1

Finder caches file/folder metadata from SMB shares. Try if disabling the directory caching helps according to the last paragraph in:

• Adjust SMB browsing behavior in macOS High Sierra 10.13 and later

Disable directory caching

Your Mac caches file and folder metadata temporarily in local memory. This improves browsing speeds, especially on high-latency networks. Systems with more memory installed can cache more file information.

If you'd like to disable directory caching so that macOS re-downloads the full contents of the folders and metadata every time you browse an SMB share, you can create or edit /etc/nsmb.conf. See the nsmb.conf man page for more information on how to edit this file.

If your system doesn't already have an /etc/nsmb.conf file, use the following Terminal commands. Note that you must be logged in as an administrator with sudoer privileges to set this file:

echo "[default]" | sudo tee -a /etc/nsmb.conf

echo "dir_cache_off=yes" | sudo tee -a /etc/nsmb.conf

Unmount/remount SMB shares afterwards.