Since updating Nightly past 20140723030202 Sync does not work anymore. I have a collection of ~100 error log files in the \weave\logs folder. Errors are e.g. 1406539728710 Sync.BrowserIDManager ERROR Non-authentication error in _fetchTokenForUser: undefined 1406539728710 Sync.Status DEBUG Status.login: success.login => error.login.reason.network 1406539728710 Sync.Status DEBUG Status.service: success.status_ok => error.login.failed or 1406539791382 Sync.ErrorHandler DEBUG Flushing file log. 1406539791383 Sync.BrowserIDManager ERROR Background fetch for key bundle failed: No keyFetchToken 1406539791383 Sync.BrowserIDManager ERROR Could not authenticate: No keyFetchToken 1406539791383 Sync.SyncScheduler DEBUG Clearing sync triggers and the global score. 1406539791384 Sync.SyncScheduler DEBUG Next sync in 90000 ms. Related to bug 1013064?

Bug 1013064 was backed out - does this work again for you now? Do you have a master password set?

I was using the 20140728 and 0729 nightlies, which should have the backout (bug 1013064 says "1 week ago"), but Sync did not recover. I don't have a master password, which I said in Bug 1013064 comment 87, but strangely not here... PS: Meanwhile I gave up and disconnected/logged-in again to get Sync working. I still have the log files, but they don't provide much detail...

The same error happens on another machine after updating to Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:34.0) Gecko/20100101 Firefox/34.0 ID:20140724030201 CSet: a91ec42d6a9c First Weave error log: 1406919535888 Sync.Service INFO Loading Weave 1.36.0 1406919535889 Sync.Engine.Clients DEBUG Engine initialized 1406919535891 Sync.Engine.Clients DEBUG Resetting clients last sync time 1406919535899 Sync.Engine.Bookmarks DEBUG Engine initialized 1406919535903 Sync.Engine.Forms DEBUG Engine initialized 1406919535907 Sync.Engine.History DEBUG Engine initialized 1406919535911 Sync.Engine.Passwords DEBUG Engine initialized 1406919535914 Sync.Engine.Prefs DEBUG Engine initialized 1406919535918 Sync.Engine.Tabs DEBUG Engine initialized 1406919535918 Sync.Engine.Tabs DEBUG Resetting tabs last sync time 1406919535927 Sync.Engine.Addons DEBUG Engine initialized 1406919535928 Sync.Service INFO Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:34.0) Gecko/20100101 Firefox/34.0 1406919535935 Sync.SyncScheduler DEBUG Clearing sync triggers and the global score. 1406919535936 Sync.Status DEBUG Status.service: success.status_ok => success.status_ok 1406919535936 Sync.Service DEBUG Caching URLs under storage user base: https://sync-44-us-west-2.sync.services.mozilla.com/1.5/2255621/ 1406919535936 Sync.Status DEBUG Status.service: success.status_ok => success.status_ok 1406919535937 Sync.Tracker.History INFO Adding Places observer. 1406919535942 Sync.Status DEBUG Status.service: success.status_ok => success.status_ok 1406919535943 Sync.Status DEBUG Status.service: success.status_ok => success.status_ok 1406919535945 Sync.Status DEBUG Status.service: success.status_ok => success.status_ok 1406919535947 Sync.Engine.AdblockPlus DEBUG Engine initialized 1406919535948 Sync.Status DEBUG Status.service: success.status_ok => success.status_ok 1406919535949 Sync.BrowserIDManager ERROR Non-authentication error in _fetchTokenForUser: undefined 1406919535950 Sync.Status DEBUG Status.login: success.login => error.login.reason.network 1406919535950 Sync.Status DEBUG Status.service: success.status_ok => error.login.failed 1406919535950 Sync.SyncScheduler DEBUG Clearing sync triggers and the global score. 1406919535951 Sync.SyncScheduler DEBUG Next sync in 600000 ms.

Same problem on Windows. I have confirmed nightly x86 and x86_64. Master password is not used. Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 ID:20140805030300 CSet: 7f81be7db528 Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:34.0) Gecko/20100101 Firefox/34.0 ID:20140805030300 CSet: 7f81be7db528 Neither Safe-mode nor disconnect/reconnect Fx account make Sync working... log in weaves/logs: 1407265087875 Sync.Service INFO Loading Weave 1.36.0 1407265087877 Sync.Engine.Clients DEBUG Engine initialized 1407265087878 Sync.Engine.Clients DEBUG Resetting clients last sync time 1407265087884 Sync.Engine.Bookmarks DEBUG Engine initialized 1407265087888 Sync.Engine.Forms DEBUG Engine initialized 1407265087892 Sync.Engine.History DEBUG Engine initialized 1407265087897 Sync.Engine.Passwords DEBUG Engine initialized 1407265087900 Sync.Engine.Prefs DEBUG Engine initialized 1407265087903 Sync.Engine.Tabs DEBUG Engine initialized 1407265087904 Sync.Engine.Tabs DEBUG Resetting tabs last sync time 1407265087910 Sync.Engine.Addons DEBUG Engine initialized 1407265087912 Sync.Service INFO Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 1407265087915 Sync.SyncScheduler DEBUG Clearing sync triggers and the global score. 1407265087916 Sync.Status DEBUG Status.service: success.status_ok => success.status_ok 1407265087916 Sync.Service DEBUG Caching URLs under storage user base: https://sync-40-us-west-2.sync.services.mozilla.com/1.5/1822226/ 1407265087917 Sync.Status DEBUG Status.service: success.status_ok => success.status_ok 1407265087917 Sync.AddonsReconciler INFO Registering as Add-on Manager listener. 1407265087917 Sync.AddonsReconciler DEBUG Adding change listener. 1407265087918 Sync.Tracker.History INFO Adding Places observer. 1407265087968 Sync.Status DEBUG Status.service: success.status_ok => success.status_ok 1407265087970 Sync.Engine.Greasemonkey DEBUG Engine initialized 1407265087971 Sync.Status DEBUG Status.service: success.status_ok => success.status_ok 1407265087973 Sync.BrowserIDManager ERROR Non-authentication error in _fetchTokenForUser: undefined 1407265087973 Sync.Status DEBUG Status.login: success.login => error.login.reason.network 1407265087973 Sync.Status DEBUG Status.service: success.status_ok => error.login.failed 1407265087973 Sync.SyncScheduler DEBUG Clearing sync triggers and the global score. 1407265087974 Sync.SyncScheduler DEBUG Next sync in 3600000 ms. Browser Console: 1407265087973 Sync.BrowserIDManager ERROR Non-authentication error in _fetchTokenForUser: undefined Log.jsm:760 1407265087976 Sync.BrowserIDManager ERROR Background fetch for key bundle failed: No keyFetchToken Log.jsm:760 1407265087976 Sync.BrowserIDManager ERROR Could not authenticate: No keyFetchToken Log.jsm:760

Problem has been fixed in nightly 20140806, with fix of bug 1013064. Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 ID:20140806030201 CSet: 6cbdd4d523a7 Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:34.0) Gecko/20100101 Firefox/34.0 ID:20140806030201 CSet: 6cbdd4d523a7

(In reply to Kosuke Kaizuka from comment #5) > Problem has been fixed in nightly 20140806, with fix of bug 1013064. What makes you assume that? The issue first occurred for me when that bug was initially in the tree before being backed out. So I would stay cautious and observe a bit...

ff34 fixed sync problem on osx for me, I just had to re-login

Thomas: can you still reproduce this?

No, FxAccount works normally for me these days. The problems where in the conversion phase when it first landed, so I guess the code has proved itself in Release since then.

Given the no keyFetchToken symptom, I'm duping to 1071786.