1593950 - Complete Browser Hang and Shutdown Hang [@ shutdownhang | mozilla::net::nsHttpConnectionMgr::Shutdown]

Status: RESOLVED DUPLICATE of bug 1593614

(Core :: Networking, defect)

Description

[Ryan Jones-Ward [:sciguyryan]]

Hi all.

For the last three or so nightlies I've been hitting a browser hang when navigating to certain websites. Two that are immediately repeatable are:
https://discordbots.org/bot/365975655608745985/vote
https://www.southwales-fire.gov.uk/newsroom/events/

This is quite interesting in that, upon navigating to either of those websites the browser completely locks up and no new pages can be loaded.

The browser will remain in the hung state until closed. Upon attempting to close the browser the process will not exist and eventually the shutdown hang crash is triggered.

Here are two examples that I was able to find, it looks as though there are plenty of others:
4cae58f4-098c-4d61-a930-83d5a0191105
88570fc8-429d-471f-af5f-dea410191105

Comment 1

[Honza Bambas (:mayhemer)]

Dragana, seems like an http3 regression:

nsresult mozilla::net::Http3Session::ProcessEvents(unsigned int, unsigned int*, bool*)
nsresult mozilla::net::Http3Session::ProcessOutputAndEvents()
nsresult mozilla::net::Http3Session::Notify(class nsITimer*)
nsTimerImpl::Fire(int)
nsTimerEvent::Run()
nsThread::ProcessNextEvent(bool, bool*)
NS_ProcessNextEvent(nsIThread*, bool)
nsresult mozilla::net::nsSocketTransportService::Run()

Comment 2

[Honza Bambas (:mayhemer)]

Ah - duplicate of 1593614