1629090 - Gmail keeps going into offline mode (and other issues with Google)

Status: VERIFIED FIXED

(Core :: Networking: HTTP, defect, P1)

Description

[Andrew McCreight [:mccr8]]

I'm using Nightly. In the last day or two, I started having issues where it keeps saying "You're offline. Results may be limited.". Some images, like the gmail logo at the upper left and the plus next to "compose" on the left sometimes fail to load. Reloading the page helps, but it soon goes into offline mode. I was inclined to blame my ISP, but Gmail loaded in Chrome seems to be just fine.

Comment 1

[Andrew McCreight [:mccr8]]

[Tracking Requested - why for this release]: Gmail not working is bad.

I don't know if this is just me, but :aki said he was seeing the same thing, on Slack.

Comment 2

[Andrew McCreight [:mccr8]]

For the images that don't load, if I right click on them and do "load image" they load up immediately. (In a new tab of course.)

Comment 3

[Aki Sasaki (not active)]

Perhaps related, I’ve also had issues loading utm urls. Once I strip the google.com/url and other query string bits from the url, I can load the target url just fine.

Comment 4

[Andrew McCreight [:mccr8]]

I'm trying to use MozRegression to narrow down when this might have started happening, if it is actually a Firefox-side issue, but it takes a while to reproduce, so it is a little hard to say if it is really happening or not at any given moment. Force reloading seems to have fixed the broken image issue I had. Maybe having multiple gmails open at once (my personal + my MoCo accounts) is required for it to happen?

Comment 5

[Andrew McCreight [:mccr8]]

Mozregression points to this regression range: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=bc95652bd74ee645e02892df049a1d22b15def4b&tochange=24b87cfe04ad9134bdc1f1ffc8b90e8f291b699d

Can you take a look, baku? Thanks.

Comment 6

[Andrew McCreight [:mccr8]]

Google Docs is having trouble loading for me, too.

Comment 7

[Andrew McCreight [:mccr8]]

I've seen another 2 or 3 people report similar problems in Slack. We should probably back out bug 1610373.

Comment 8

[Andrew McCreight [:mccr8]]

Bug 1610373 has been backed out. Hopefully this problem will be fixed in the next Nightly in a few hours.

Comment 9

[Andrea Marchesini [:baku]]

I doubt that bug is the reason because in that bug I introduce a new method which is not used yet.

Comment 10

[Andrew McCreight [:mccr8]]

I'll try to do another bisection.

Here's a slightly wider range I got in the middle: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=75323c5f1047c579989b6a0dabd8fa29c854c869&tochange=33d2485721c6ffd20a952d698754041a14be11b3

I will note that "Turn on HTTP/3 on Nightly" is in there, and that seems like a big change that could cause issues when loading things...

Comment 11

[Francesco Lodolo [:flod]]

For what it's worth, I've seen the problem with Gmail randomly for a while (months), but I haven't been able to reproduce it reliably.

Sometimes it happens after a browser restart, others after I get my mac out of sleep, and I realize it only when I click on a label (the inbox, or the currently viewed label would look normal, no sign of being offline).

EDIT: I've found my own message on Slack where I was asking if others were seeing this issue, it's from end of October. I confess I haven't seen it for a while, but it happened again in the last couple of days.

Comment 12

[Aki Sasaki (not active)]

I flipped the network.http.http3.enabled pref to false, and will report back if I see the issue again.

Comment 13

[Andrew McCreight [:mccr8]]

A more consistent STR for me seems to be loading docs.google.com. In the bad case, it'll fail during loading with "No connection" almost immediately, I think.

Comment 14

[Andrew McCreight [:mccr8]]

A second round of mozregression pointed at bug 1628461, but now I can't reproduce the issue at all in my profile on the latest Nightly.

Sorry for the bad regression range, Baku. I guess I did something wrong when it got down to the very last step and took the wrong split at a bisection branch. I should have looked at the patch first.

Comment 15

[Andrew McCreight [:mccr8]]

Dragana, this is a possible regression from bug 1628461 that you might want to see, though the repro steps are a bit finicky so it is hard to say for sure.

Comment 16

[Andrew McCreight [:mccr8]]

I mozregressed another time and it again pointed to bug 1628461. I'm sometimes able to reproduce the symptoms (things like Google Docs not fully loading, icons not all loading on Gmail) with http3 enabled, but not disabled, but sometimes it loads just fine, so I'm not sure.

Comment 17

[Dragana Damjanovic [:dragana]]

Http/3 is turned off again (in the next Nightly build). Can you send me a http log. It will contain cookies and URIs. probably grepping for Http3Session and Http3Stream will be enough logging to see what is happening. Please look at the log if it still contains cookies and uris (I am not sure.)

google is not advertising http3 for me.

Comment 19

[Dragana Damjanovic [:dragana]]

Disabled in bug 1629057

Comment 20

[Andrew McCreight [:mccr8]]

I've emailed you the log.

Comment 21

[Dragana Damjanovic [:dragana]]

From the log:

we successfully finish handshake. We send some request, we receive just a single small packet and nothing else. We do not get any response from the server. We retransmit packets but we are not receiving anything.

Other connection to google using http3 work fine.

Comment 22

[Jeff Walden [:Waldo]]

FWIW I was hitting intermittent -- but consistent for long stretches of time -- problems with Google stuff (search results pages would immediately show "Timed out" network error pages, filling out a survey wouldn't load all stylesheets, trying to switch accounts to fill out that survey wouldn't load all images and trying to click on a different account wouldn't switch logins right) with HTTP 3 enabled. I was also hitting problems doing image uploads as comments on Facebook -- uploading a 317K image would get around 30K into the POST of it and not complete.

Flipping the network.http.http3.enabled pref immediately made all those work consistently. :-|

Comment 24

[Andrew McCreight [:mccr8]]

Fixed by backout.

Comment 25

[BugBot [:suhaib / :marco/ :calixte]]

This bug is tracked by a release manager but with a small severity so change it to major.
For more information, please visit auto_nag documentation.

Comment 26

[Bogdan Maris, Desktop Test Engineering]

Reproduced the initial issue using an old Nightly build from 2020-04-10, verified that this is fixed using latest Firefox Beta 77.0b9 across platforms (macOS 10.15, Windows 10 64bit and Ubuntu 18.04 64bit).