793637 - Hang on shutdown of Firefox (when installing an update)

Status: RESOLVED DUPLICATE of bug 729536

(Core :: Networking, defect)

Description

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Attachment: activity monitor sample

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:17.0) Gecko/17.0 Firefox/17.0 ID:20120923042010

When I was updating Aurora from 120919 to 120923 I triggered the restart of the browser via the about window. Firefox didn't shutdown but keeps running with about 35 threads and a memory usage of 700MB. This was ongoing for a couple of minutes. After recording some information I finally had to force kill the application.

I haven't had such a situation for a long time. So far I haven't tried to reproduce but will do once the updates of today are available.

Comment 1

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Attachment: aurora report

If necessary I have an aurora trace via Instruments available. If wanted I can share it via e.g. dropbox. It's about 190MB in size. For now here the Aurora report information.

Comment 2

[Boris Zbarsky [:bzbarsky]]

In the activity monitor sameple HTTP is waiting on ... something.  The SSL code is also waiting on ... something.  Possible deadlock there?

Comment 3

[Henrik Skupin [:whimboo][⌚️UTC+1]]

So here the link to the instrument trace:
https://www.dropbox.com/s/7s5f6z289ltwb9c/aurora.trace.zip

Comment 4

[:Irving Reid (No longer working on Firefox)]

I have Aurora 17.0.2 hung with pretty much the same call graph as :whimboo's activity monitor sample https://bug793637.bugzilla.mozilla.org/attachment.cgi?id=663992

I'll try to get symbols and attach a debugger...

Comment 5

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Irving, do you see the same in 18.0 or even 16.0 beta? The latter could possibly be a blocker.

Comment 6

[:Irving Reid (No longer working on Firefox)]

I've only been running Aurora, and I don't have steps to reproduce. Unfortunately when I tried to attach a debugger the hung process exited, so I don't have any more evidence except a saved Activity Monitor sample.

Comment 7

[Henrik Skupin [:whimboo][⌚️UTC+1]]

I have updated from yesterdays to todays build without a hang involved now. It could be related to a hibernation which I haven't done during today. I will keep an eye on it.

Comment 8

[Alex Keybl [:akeybl]]

Tracking for now, and sending over to Ehsan to take a look at the sample when he gets the chance. I suspect that if this happens around updates, bgupdates may be implicated.

Comment 9

[(no longer active)]

This has every indication of being a deadlock.  I don't see any evidence to believe that this has anything to do with bgupdates.

Comment 10

[Alex Keybl [:akeybl]]

Thanks Ehsan.

Josh - can you recommend somebody to take a look at this on the networking side?

Comment 11

[Josh Aas]

Patrick, Brian, Honza - any idea what is going on here?

Comment 12

[Brian Smith (:briansmith, :bsmith, use NEEDINFO?)]

Known deadlocks: bug 698882, bug 729536, bug 726103.

Comment 14

[Lukas Blakk [:lsblakk] use ?needinfo]

no need to track, duplicate of a bug that's been around since 13.