Syncthing no longer syncs

Hi, I’m using Syncthing (v1.15.1, Linux (64-bit Intel/AMD)) for quite some time now. It was working very good, backing up several folders from my Android phone onto an Ubuntu (20.04) server. Lately I got a new phone and wanted to add this one too. But during the setup, I noticed that the last successful sync of the old phone was in may :confused:

After setting up the first folder on the new phone, it said ‘0 / 102 Files’. Both devices say they are connected, they try to start syncing but nothing ever happens. I then copied a few files manually from the new phone to the configured target folder on the server. Upon a restart of the Syncthing app on the phone, it said ‘10 / 102 Files’. It seems the two devices exchange some data at least.

Here is the log I get when restarting the Syncthing app on my phone. syncthing_log.txt (1.3 KB) Very odd is the line with ‘…insufficient space in basic…’. That mount has over 100GB free space.

Thank you for any hints, kopi

Could you show the output of df -h on your server?

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Sure, here you go

Filesystem      Size  Used Avail Use% Mounted on
/dev/md0         11T   11T  103G 100% /mnt/md0
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The check is by default based on percentage and set to require 1% free space. Your volume is 100% full, approximately. Edit the settings to your liking in the folder editor, advanced tab.

The error message was also changed a couple of years back to be slightly less confusing. You might upgrade.

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Thank you very much, after setting it to 0% the rest of the files was immediately synced.

How can I upgrade? Tried it with apt-get upgrade, but Syncthing was not included. When listing the installed packages, it is listed.

$ apt list --installed
syncthing/now 1.15.1 amd64 [installed,local]

When looking into the apt sources, I can see

/etc/apt/sources.list.d/syncthing.list:# deb syncthing stable # disabled on upgrade to focal
/etc/apt/sources.list.d/syncthing.list.distUpgrade:deb syncthing stable
/etc/apt/sources.list.d/ deb syncthing stable # disabled on upgrade to focal

Do I have to upgrade to a newer Ubuntu version? I’m a bit scared of what applications might not work after an OS upgrade so I’m hesitating for quite a while now to upgrade to the next LTS.

They’re commented out due to some upgrade, you can just remove the commenting and you should be fine.

Thanks again, after removing the commenting and doing the apt-get upgrade, Syncthing was upgraded and I’m now on v1.23.5, Linux (64-bit Intel/AMD).

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