1174663 - Facebook video call is failing intermittently (hard to repro)

Status: RESOLVED INCOMPLETE

(Core :: WebRTC: Audio/Video, defect, P1)

Description

[Catalin Varga [QA][:VarCat]]

Environment:

Caller: 
FF 41 
OS: Ubuntu 14.04 x64

Callee:
FF 38.0.1 ESR
Windows 7 x86

Prerequisites:
media.navigator.video.preferred_codec = 126

STR:

1. The caller start a video call from facebook.

Issue:
The call is failing at the start.
This error is logged in browser console:

this.editor is null urlbarBindings.xml:203:0
TypeError: this.editor is null urlbarBindings.xml:203:15
RemoteWebProgress failed to call onStateChange: [Exception... "[JavaScript Error: "this.editor is null" {file: "chrome://browser/content/urlbarBindings.xml" line: 203}]'[JavaScript Error: "this.editor is null" {file: "chrome://browser/content/urlbarBindings.xml" line: 203}]' when calling method: [nsIWebProgressListener::onStateChange]"  nsresult: "0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)"  location: "JS frame :: resource://gre/modules/RemoteWebProgress.jsm :: RemoteWebProgressManager.prototype._callProgressListeners :: line 174"  data: yes]
 RemoteWebProgress.jsm:176:0
this.editor is null

Note:
This issue is intermittent.

Comment 1

[Catalin Varga [QA][:VarCat]]

Attachment: logs.txt

I've attached the logs from a debug FF 41 build.
Please note that this bug is reproducible even without adding
media.navigator.video.preferred_codec = 126 pref

Comment 2

[Randell Jesup [:jesup] (needinfo me)]

We need NSPR_LOG_MODULES to be set to get the right logs

NSPR_LOG_MODULES=signaling:5,mediamanager:5,timestamp

(5 may be overkill but I'd rather get too much data than not enough).

Comment 3

[Randell Jesup [:jesup] (needinfo me)]

Also: how frequent is this intermittent?

Comment 4

[Catalin Varga [QA][:VarCat]]

I've tried for over an hour to reproduce the issue to collect NSPR logs but I didn't manage to reproduce it so apparently is not that common.

Comment 5

[Randell Jesup [:jesup] (needinfo me)]

Can you try one more time to reproduce this (with logs).  Otherwise, I think we have to close this as incomplete or worksforme as the problem could lie in Facebook (and have been an intermittent issue with their service).  Thanks!

Comment 6

[Maire Reavy [:mreavy]]

I'm happy to reopen if we can get more info.

Comment 7

[Catalin Varga [QA][:VarCat]]

I've tried several times to reproduce the issue without success.