Webinterface freezes in Firefox

[stevenmccormack]

• Gitea version (or commit ref): 1.12.1
• Git version: 2.20.1
• Operating system: Debian 10
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • Not relevant
• Log gist:

Description

After upgrading from 1.11.0 to 1.12.1 the webinterface periodically freezes for about 30-60 seconds. After about 5 clicks (it does not matter what I click, I can go to the main page and press F5 to reproduce the issue) the browser seems to be stuck during page load.
The logfile (loglevel Trace) only shows the following every 10 secunds during the freeze

2020/06/23 14:13:40 ...m.io/xorm/core/db.go:154:QueryContext() [I] [SQL] SELECT user_id, count(*) AS count FROM notification WHERE user_id IN (SELECT user_id FROM notificatio
n WHERE updated_unix >= ? AND updated_unix < ?) AND status = ? GROUP BY user_id [1592914408 1592914418 1] - 2.564311ms
2020/06/23 14:13:50 ...m.io/xorm/core/db.go:154:QueryContext() [I] [SQL] SELECT user_id, count(*) AS count FROM notification WHERE user_id IN (SELECT user_id FROM notificatio
n WHERE updated_unix >= ? AND updated_unix < ?) AND status = ? GROUP BY user_id [1592914418 1592914428 1] - 2.689541ms

After 30-60 seconds the log shows that the request is preocessed and if I reload the page it works again for about 5 clicks

This only seems to happen when I use Firefox (77.0.1 Linux). Chrome seems to work just fine

[kolaente]

Anything in the browser console? Is it the same on try?

(I'm running my instance on master and don't have any issues in Firefox)

[jmert]

I'm seeing the same thing as OP: personally run instance is stalling on web requests in Firefox, but not on the try.gitea.io instance. I'm not seeing anything in Firefox's console while the page load is stalled (no messages in Console, nor any activity in the Network tab).

Server information:

• Gitea 1.12.1
• with SQLite database
• on Ubuntu 18.04LTS
• with git version 2.17.1
• served through an Apache 2.4.29 reverse proxy (HTTPS to client)

Client information:

• Firefox 77.0.1 on Arch Linux
• reproducible after restarting Firefox in Safe Mode

Looking at the Apache logs for the proxy, it might be the GET /git/user/events requests which are stalling (??).

[lafriks]

Duplicate of #11978

[lafriks]

Clear browser cache, that should fix freezing in single tab

[titou10titou10]

@lafriks clearing the cache did not improved the situation. I'm in the same boat at the others
And as for the others, 5 seems to be a "magical" number here

[jmert]

This is probably a key point: https://developer.mozilla.org/en-US/docs/Web/API/EventSource. In Firefox, there's a limit on the total number of EventSources used for each domain when the page is accessed via HTTP/1.1. I can confirm that the server where I've seen the problem only supports HTTP/1.1. (I have another which has HTTP/2 enabled, but it hasn't yet been upgraded to gitea v1.12 so I can't yet say for sure that it won't have problem eventually there, too.)

[twoequaldots]

I can confirm this problem exists for me as well. I've tried to clear browser cache in Firefox and it does not help. This problem appeared in 1.12.0 and prevails in 1.12.1.

A buddy of mine also suspect it is related to EventSource. It seems to be pointing that direction. Right now I'm using Chrome / Chromium with no issue (only Firefox).

[Briffou]

Had the same issue on Firefox with gitea 1.12.1 and a server using HTTP/1. I activated HTTP/2 on the server as mentioned by @jmert, and this bug didn't show up since. So, thank you @jmert for pointing out EventSource !

[stevenmccormack]

I am running my instance behind HAProxy. I can confirm, that the problem goes away for me as well after enabling HTTP/2 for this frontend in HAProxy.

[zeripath]

I'm betting this is a duplicate of #11978

[lafriks]

Closing as duplicate