You have been disconnected when there are more than 20 people

[wanghx12]

What happened?

I installed jitsi test and production environment and it worked for a few months. But recently there was a problem.

When more than 20 people participate in a meeting using production environment, interruptions occur. It usually reappears within three minutes. The test environment does not have this problem.
The background log does not contain any error information. The following figure shows the console log

Platform

• Chrome (or Chromium based)
• Firefox
• Safari
• Other desktop browser
• Android browser
• iOS browser
• Electron app
• Android mobile app
• iOS mobile app
• Custom app using a mobile SDK

Browser / app / sdk version

2.0.8960-1

Relevant log output

No response

Reproducibility

• The problem is reproducible on meet.jit.si

More details?

No response

[damencho]

The 504 means something is wrong with prosody and nginx timeouts connecting to it.
Checkout prosody logs for errors. Which prosody version do you use?

[wanghx12]

The 504 means something is wrong with prosody and nginx timeouts connecting to it. Checkout prosody logs for errors. Which prosody version do you use?

prosody version:
ii jitsi-meet-prosody 1.0.7531-1 all Prosody configuration for Jitsi Meet
ii prosody 0.12.4-1~focal1 amd64 Lightweight Jabber/XMPP server

Neither /var/log/prosody/prosody.log or /var/log/prosody/prosody.err has any error message.
When the problem occurs, /var/log/prosody/prosody.err is empty, /var/log/prosody/prosody.log is as follows:
Dec 11 10:10:50 bosh3e1f85c8-fd4e-4389-a8fa-5d9ace7ed456 info BOSH client disconnected: session close
Dec 11 10:10:51 mod_bosh info New BOSH session, assigned it sid '24f67821-aed3-4673-8962-2744db2dedab'
Dec 11 10:10:51 bosh24f67821-aed3-4673-8962-2744db2dedab info Authenticated as [email protected]
Dec 11 10:10:55 mod_bosh info New BOSH session, assigned it sid 'eaf33368-699a-4f53-bf12-f6f459caba97'
Dec 11 10:10:55 bosheaf33368-699a-4f53-bf12-f6f459caba97 info Authenticated as [email protected]
Dec 11 10:10:58 mod_bosh info New BOSH session, assigned it sid '01a1b1a6-2c14-458a-a0ca-caab979332f2'

[damencho]

What is resources of the machine you use to host jitsi-meet?

[wanghx12]

What is resources of the machine you use to host jitsi-meet?
Ubuntu 20.04

[damencho]

Like available Ram for jitsi-meet?

[wanghx12]

Like available Ram for jitsi-meet?

Machine configuration is 8C16G
We install jitsi refer to this document
In the previous use process, 100 users participated without interruption; Recently, the problem occurred when 20 users attending the meeting. Is it possible that the load is too high for the background to handle？

[damencho]

Not sure what it is ... Monitor the cpu usage overall, and monitor the prosody process cpu usage and the memory used.
Is jitsi-meet the only thing running there? 16GB of ram should be enough.