818510 - Homescreen sometimes hangs and/or crashes (possibly in OOM situations)

Status: RESOLVED WORKSFORME

(Firefox OS Graveyard :: Gaia::Homescreen, defect, P1)

Description

[Stefan Arentz | :st3fan | ⏰ EST | he/him]

Attachment: Output from logcat while hitting the Try Again button

I hit the home button to go back to the home screen. It showed an empty home screen with just the background but no icons. After a few seconds it showed me the 'Homescreen is having problems' error.

Hitting the 'Try again' button does not do anything.

Logcat output attached to the bug.

Comment 1

[Stefan Arentz | :st3fan | ⏰ EST | he/him]

Also, neither Close or Try Again do anything. Close should probably force-kill-restart the homescreen?

Comment 2

[Naoki Hirata :nhirata (please use needinfo instead of cc)]

STR:
1. place a lot of images in the gallery (50+)
2. using the gallery app's shortcut to camera, take a picture
3. go back to the gallery app using the camera app's shortcut
4. edit image and save the image

Expected: no hang/image saves
Actual: hang, homescreen will crash (due to OOM?)

I ran into this yesterday and the day before.  You can't get the homescreen back by hitting home; you need to reboot the phone

Comment 3

[Alex Keybl [:akeybl]]

Mass Modify: All un-milestoned, unresolved blocking-basecamp+ bugs are being moved into the C3 milestone. Note that the target milestone does not mean that these bugs can't be resolved prior to 12/10, rather C2 bugs should be prioritized ahead of C3 bugs.

Comment 4

[Alex Keybl [:akeybl]]

Sending over to Vivien. This bug may morph into "Homescreen should better handle app OOM", if that's the root cause.

Comment 6

[Chris Lee [:clee]]

Cjones, do you know why we're not restarting the Home Screen after the crash?

Comment 7

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

This sounds a lot like bug 820702, but the bug report was filed right around a known-good revision and the symptoms are slightly different.

The only way the report in comment 0 could occur is if the b2g process and foreground apps are using enough memory that the homescreen can't restart.  If we can reproduce that, it would definitely be a blocker because that would not meet the memory-usage acceptance requirements.  Since this was filed though, we finally merged two really large memory wins to b2g18.  So that may not repro anymore either.

Comment 2 may be describing bug 820702.  needinfo? -> nhirata to see if that still reproduces.

Comment 8

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

I wonder if this bug can have been an occurrence of E.me living in the homescreen process. The fact that Stefan has seen this Try Again button seems like a content error to me not something that should have happened with a regular application.

Otherwise I'm not able to reproduce the bug right now. The homescreen crash when OOM but he is restarted as expected.

Comment 9

[Naoki Hirata :nhirata (please use needinfo instead of cc)]

I am not sure either.  I cannot reproduce the issue with the STRs that I had before.

I have seen issues revolving around the browser app and the content not loading but that is separate from this bug I believe.

Should we mark this WFM until someone else reproduces?

Comment 10

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

Yep.