Trackers are not contacted after VPN connection loss

[SaltySP]

qBittorrent & operating system versions

qBittorrent 4.3.9 x64
Windows 10 Pro 21H1/19043.1348

What is the problem?

When VPN loses connection the torrents display: "Reannounce in 68y 32d". The individual trackers display: "Not contacted yet".
This also happens when system goes into sleep mode.

Steps to reproduce

1. Run Qbit with a VPN with Wireguard, network interface set in Qbit.
2. Disconnect the VPN
3. Reconnect VPN
4. Monitor torrent status

Additional context

Log(s) & preferences file(s)

No response

[gothicserpent]

A case where I do experience this issue is when my VPN loses connection for a few minutes and reconnects to a different server overnight after an isp maintenance reboot of my modem. My outcome is that some of the trackers I have are listed as not contacted yet with general -> transfer -> reannounce in: 68y 20d, while some of the others are marked as Updating and do end up re-connecting and working properly. Whenever I notice a spike in the number of "Error" trackers on the left pane, that's my cue to do the following: I have been solving the issue by pausing all torrents and resuming all torrents, and that always resolves the issue for me.

After doing some digging, I believe this may be related to arvidn/libtorrent#4412 as it's related to a VPN reconnect and tracker connection error afterwards.

I also want to note that I tried to manually disconnect and reconnect my VPN to a new server, and it doesn't seem to happen. Looks like the DHT goes up in count in a few seconds again, as tested on 12/9/2021 and the trackers are listed as working.

The issue happens when my internet modem is restarted / my ISP has a temporary outage for maintenance which in turn triggers a new VPN server connection attempt, as opposed to just changing servers on my VPN which doesn't seem to cause the issue for me anymore.

In summary, I recommend other people try to test this to see if they experience it also during modem restart / ISP shutdown vs. VPN reconnection.

[SaltySP]

In 4.4.0 I spotted the "Re-announce to all tracker when IP or port changed" option.
Unfortunately this also doesn't work and trackers stay in the "Not contacted yet" state.

[DarkVoyage]

Confirm the issue as above. Also I see that same issue was submitted many times before and was closed as "not an issue", but this is exactly an issue. Manual reannounce doesn't help. Pause-start helps, but if VPN disconnects/reconnects several times many torrents might stuck in this condition and it doesn't allow to keep unattended 24/7 operation.

[SaltySP]

I have been using 4.4.2 for a couple of days now. The re-announce option seems to work now.
I would like everybody else to check if the problem is gone for them too. I would like to close this thread if the problem is solved.

[DarkVoyage]

The exact problem is resolved, but there are more problems about VPN connection and announcers that still break the unattended operation.

[kpupp]

To be clear, is the resolution to upgrade manually to 4.4.2, then? I experience this exact same issue, and can't just pause/resume everything all the time. I also see, like @DarkVoyage says, that it's been reported many times but inexplicably closed and locked with "just pause/resume" seemingly as the resolution. I'm not sure these kinds of issues should be self-closed, as the root problem seems to persist with stable releases (my server runs -nox 4.3.9, and it doesn't seem Ubuntu's repos have 4.4.x yet).

[SaltySP]

Yes, tick the "Re-announce to all trackers when IP or port changed" option under the advanced section. I'm not a linux expert but there is an AppImage download on the qbittorrent homepage, created on ubuntu 20.04.

[kpupp]

@SaltySP Updating my server to Impish (21.10) and qbit to 4.4.x seemed to fix it. I should've looked a little closer at the zipped files available, but it seems like the last version 20.04 got (via package managers) was 4.3.9. qbittorrent-nox itself it a little different, too. .Thanks!

[ghost]

This was a libtorrent bug and was fixed recently by arvidn/libtorrent#6626