Frequent "Connection Lost" prompts

[mholl1983]

Starting to use Webmin more on my Buffalo TS-XEL running Debian. The UI works fine, but I get a lot of frequent Connection Lost prompts, usually at least one when switching from one screen to another.

I'm new to this, so do let me know if I can provide more details, logs, etc.

[mholl1983]

Example screenshot.

[jcameron]

@iliajie possibly due to background refreshes being done by the Authentic Theme?

[iliajie]

@iliajie possibly due to background refreshes being done by the Authentic Theme?

Perhaps, but less likely!

This could be tested by disabling real-time monitoring on Theme Configuration: Dashboard and real-time monitoring page.

The other reason is DNS issue and/or a machine with really low resources (CPU wise).

[mholl1983]

Thanks for the replies, folks! Seems to be related to the theme. I tested legacy and grey paneled options and they don't produce the same error message, so I suspect it was the Authentic Theme on my part. DNS and system resources seem to be healthy enough.

[mholl1983]

In case it helps to see the system resources view.

[iliajie]

Have you tried disabling real-time monitoring on Theme Configuration: Dashboard and real-time monitoring page?

Also, do you get any specific errors logged on Network tab in browser console?

[mholl1983]

Hmmm, I can't seem to find the Theme Configuration page in Webmin. All I know is that the error prompts went away when I switched themes.

I'm not sure where the Network tab is, but here are the log files I see. Let me know if you need me to check something specific.

[mholl1983]

Switched back to Authentic Theme, so let me know if I can test anything out. It is much slower than the other themes so far.

[mholl1983]

Apologies, I found the Theme Configuration page after. I just disabled real-time monitoring and will report back.

[mholl1983]

After disabling that settings, things seemed better for a few minutes but the connection lost prompts came back.

[iliajie]

After disabling that settings, things seemed better for a few minutes but the connection lost prompts came back.

You can completely disable any background status pulling by opening browser console (F12) and executing:

settings_side_slider_background_refresh_time = 0;
theme.config.save();

[cntrlwiz]

Sorry for resurrecting an old thread... but ... I found a solution to my identical problem.
This is Webmin 2.020 and Authentic theme version 20.20.1, running on a Debian 11.6 Proxmox host machine.
Using the Authentic theme, I was getting the same "Connection lost" errors anytime I tried to navigate.
I went looking in the logs for any kind of error, and I found this in miniserv.error:

Error: '/mnt/pve/backup-san1' is already assigned to be mounted
df: /mnt/pve/backup-san1: Stale file handle
df: /mnt/pve/backup-san1-3: Stale file handle

It's odd that these messages don't have timestamps...but that's a different issue.
These are NFS mounts that I had disabled, but not removed from the filesystem list.
I don't have a screenshot, but they were in the list as "In use=no, Saved=yes".

Once I removed them, the "Connection lost" errors were gone.

[aryanrajseo]

This issue is with Ubuntu 22.04 too. Almalinux 9 have no issue with the theme.