My laptop just informed me that it was unable to sync because it could not login. The UI now says "Please sign in to reconnect fxsync1@v.igoro.us". I haven't changed my account password or anything like that for months. The only recent change was setting up a new browser on the same account on Monday. Logs: 1420149537141 Sync.Service INFO Loading Weave 1.36.0 1420149537144 Sync.Engine.Clients DEBUG Engine initialized 1420149537146 Sync.Engine.Clients DEBUG Resetting clients last sync time 1420149537153 Sync.Engine.Bookmarks DEBUG Engine initialized 1420149537157 Sync.Engine.Forms DEBUG Engine initialized 1420149537162 Sync.Engine.History DEBUG Engine initialized 1420149537167 Sync.Engine.Passwords DEBUG Engine initialized 1420149537170 Sync.Engine.Prefs DEBUG Engine initialized 1420149537175 Sync.Engine.Tabs DEBUG Engine initialized 1420149537176 Sync.Engine.Tabs DEBUG Resetting tabs last sync time 1420149537181 Sync.Engine.Addons DEBUG Engine initialized 1420149537182 Sync.Service INFO Mozilla/5.0 (X11; Linux x86_64; rv:34.0) Gecko/20100101 Firefox/34.0 1420149537185 Sync.SyncScheduler DEBUG Clearing sync triggers and the global score. 1420149537186 Sync.Status DEBUG Status.login: error.login.reason.account => error.login.reason.account 1420149537186 Sync.Status DEBUG Status.service: error.login.failed => error.login.failed 1420149537186 Sync.Service DEBUG Caching URLs under storage user base: https://sync-157-us-west-2.sync.services.mozilla.com/1.5/14213280/ 1420149537186 Sync.Status DEBUG Status.login: error.login.reason.account => error.login.reason.account 1420149537186 Sync.Status DEBUG Status.service: error.login.failed => error.login.failed 1420149537186 Sync.AddonsReconciler INFO Registering as Add-on Manager listener. 1420149537186 Sync.AddonsReconciler DEBUG Adding change listener. 1420149537187 Sync.Tracker.History INFO Adding Places observer. 1420149537231 Sync.Status DEBUG Status.login: error.login.reason.account => error.login.reason.account 1420149537231 Sync.Status DEBUG Status.service: error.login.failed => error.login.failed 1420149537232 Sync.Status DEBUG Status.login: error.login.reason.account => error.login.reason.account 1420149537232 Sync.Status DEBUG Status.service: error.login.failed => error.login.failed 1420149537234 Sync.Engine.AdblockPlus DEBUG Engine initialized 1420149537235 Sync.Status DEBUG Status.login: error.login.reason.account => error.login.reason.account 1420149537235 Sync.Status DEBUG Status.service: error.login.failed => error.login.failed 1420149537244 FirefoxAccounts INFO Can't find the rest of the credentials in the login manager 1420149742035 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149811193 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149835682 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149841889 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149872409 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149880633 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149887793 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149889892 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149893868 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149917404 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149920428 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149924575 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149934090 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149962885 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149975540 Sync.Tracker.History DEBUG Saving changed IDs to history 1420149977067 Sync.Tracker.History DEBUG Saving changed IDs to history 1420150083438 Sync.Tracker.History DEBUG Saving changed IDs to history 1420150102489 Sync.Tracker.History DEBUG Saving changed IDs to history 1420150120847 Sync.Tracker.History DEBUG Saving changed IDs to history 1420150145328 Sync.Tracker.History DEBUG Saving changed IDs to history 1420150155384 Sync.Tracker.History DEBUG Saving changed IDs to history 1420150515430 Sync.Tracker.History DEBUG Saving changed IDs to history 1420150558930 Sync.Tracker.History DEBUG Saving changed IDs to history 1420150579477 Sync.Tracker.History DEBUG Saving changed IDs to history 1420150634532 Sync.SyncScheduler DEBUG Clearing sync triggers and the global score. 1420151204873 Sync.SyncScheduler DEBUG Next sync in 600000 ms. 1420151236778 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151255728 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151359878 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151373083 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151386603 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151390759 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151494681 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151499982 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151521201 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151529135 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151537113 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151728028 Sync.Tracker.History DEBUG Saving changed IDs to history 1420151804875 Sync.Service DEBUG User-Agent: Firefox/34.0 FxSync/1.36.0.20141201111703. 1420151804875 Sync.Service INFO Starting sync at 2015-01-01 17:36:44 1420151804876 Sync.Service DEBUG In sync: should login. 1420151804878 Sync.Status DEBUG Status.login: error.login.reason.account => error.login.reason.account 1420151804878 Sync.Status DEBUG Status.service: error.login.failed => error.login.failed 1420151804878 Sync.Status DEBUG Status.login: error.login.reason.account => error.login.reason.account 1420151804878 Sync.Status DEBUG Status.service: error.login.failed => error.login.failed 1420151804882 Sync.Service INFO Logging in the user. 1420151804882 Sync.Service DEBUG Caching URLs under storage user base: https://sync-157-us-west-2.sync.services.mozilla.com/1.5/14213280/ 1420151804906 FirefoxAccounts INFO Can't find the rest of the credentials in the login manager 1420151804907 Sync.Service DEBUG Fetching unlocked auth state returned error.login.reason.account 1420151804908 Sync.Status DEBUG Status.login: error.login.reason.account => error.login.reason.account 1420151804908 Sync.Status DEBUG Status.service: error.login.failed => error.login.failed 1420151804908 Sync.SyncScheduler DEBUG Clearing sync triggers and the global score.

> 1420151804906 FirefoxAccounts INFO Can't find the rest of the credentials in the login manager This seems like a problem. :markh, ideas what may have caused this?

Sadly I've no idea why this happened, but "Can't find the rest of the credentials in the login manager" certainly explains why Sync was in a "needs reauth" state. Dustin: * Did you notice any other passwords missing from that profile? If somehow the sqlite file was corrupt then I believe it will be clobbered (which would explain this). Maybe looking at your saved passwords and ensure all you expect are there (although if sync has started working again after you did the reauth, it's possible Sync itself repopulated the database) * After you re-authenticated, did it continue to work after the next restart? * As a long-shot, do you have any password manager related addons

I installed LastPass on the laptop *after* this occurred, and that imported my existing Firefox passwords, all of which seem to still be in place. So I don't think the sqlite file was clobbered. However, the chrome://FirefoxAccounts site passwords are *not* present. After re-authenticating (just now), I see the chrome://FirefoxAccounts password saved. As sync re-filled my account, it also populated a chrome://FirefoxAccounts password for an older (broken) sync account under a different email address. Could that be related? I've deleted that password (and all the rest, now that I'm using LastPass).

I just went through the lastpass setup process, and one of the steps offers to import the existing data from the firefox password manager *and* offers to delete those items (with the defaults for both being true). While that might not have happened in this specific case, it sounds like something lastpass is going to do in some cases. So tl;dr is that I think we can *expect* users installing lastpass will leave them in a "needs reauth" state and there's not alot we can do about it.

That observation is correct, but to be clear in this case I installed LastPass *after* this failure (because I was so frustrated with password sync failures)

Another good candidate for trying to measure how often this happens.

I have this problem too. It happens all the time, shortly after the first synchronization (first run after install). It also happens in Linux, Windows 7, Windows 8.1 and Windows 10. If I delete my profile I am able to synchronize after the first start, then I get the same sync error every time I start Firefox again. I think this problem lasts from more than six month, after a firefox update (can't remember the version). I don't know why it takes so long to solve this problem, I think is very annoying.

(In reply to amihaita from comment #7) > I have this problem too. Do you have Firefox set to "Clear history when Nightly closes" (in the Privacy tab in settings)? If so, that will explain the problem and that should be fixed in Firefox 42.

(In reply to Mark Hammond [:markh] from comment #8) > (In reply to amihaita from comment #7) > > I have this problem too. > > Do you have Firefox set to "Clear history when Nightly closes" (in the > Privacy tab in settings)? If so, that will explain the problem and that > should be fixed in Firefox 42. I am using Firefox 40.0.3, and in Privacy tab is no "Clear history when Nightly closes" option, only "Tracking", "History" and "Location bar" with different options, but not what you mentioned.

It's been a while on this one, but next steps would be to add telemetry probe to see how often the following happens: signedInUser.json suggests there is a logged in user, but we can't find any credentials in password manager.

Created bug 1241598 for the telemetry work.

Closing, because telemetry work has been finished in bug 1236383. IIUC, there was no wider evidence of this bug.