1137658 - 5.31% WinXP Session Restore no Auto restore regression on Beta (v.38) from uplift

Status: RESOLVED WONTFIX

(Testing :: Talos, defect)

Description

[Joel Maher ( :jmaher ) (UTC -8)]

it appears we didn't get any alerts generated for ts,paint as it crept up slowly over the last 3 weeks:
http://graphs.mozilla.org/graph.html#tests=[[315,52,31],[315,63,31]]&sel=none&displayrange=30&datatype=geo

We see this on the aurora uplift:
http://alertmanager.allizom.org:8080/alerts.html?rev=f531d838c055&showAll=1&testIndex=0&platIndex=0#

This happens often enough, but this is too hard to track down, I think we should document that this has become worse and plan to focus on fixing this in a future timeline.

I have tried to retrigger jobs around Feb 11th on inbound:
https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&filter-searchStr=Windows 8 64-bit mozilla-inbound talos other_nol64&fromchange=5d69960fc738&tochange=4d68750b4e28

I suspect there is another small slow creep after Feb 11th, but if we can identify part of this it would be nice.

Comment 1

[Joel Maher ( :jmaher ) (UTC -8)]

ok, moving back to feb 10th, here is the range with some retriggers:
https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&filter-searchStr=Windows 8 64-bit mozilla-inbound talos other_nol64&fromchange=9733e78176b2&tochange=3fe8d7d7f9f7

Comment 2

[Joel Maher ( :jmaher ) (UTC -8)]

narrowed the range:
https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&filter-searchStr=Windows 8 64-bit mozilla-inbound talos other_nol64&fromchange=ce051d575b45&tochange=2d8dde5faef9

it appears that either the uplift from:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?changeset=ee093ca70666

or bug 1128490:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?changeset=7152dc5221cb

is the root cause, i am leaning towards the change from bug 1128490 as there are more data points > 665 in the 10 we have.

:avih, can you weigh in here?

Comment 3

[Avi Halachmi (:avih)]

I can't help with pinpointing the offending push - if there is such one.

IMO if we can detect the offending push, then we should ask the owner about it, and if we can't - let it be. It's quite small and possibly creeping regression anyway, so there might not be much we can do about it IMO.

Comment 4

[Joel Maher ( :jmaher ) (UTC -8)]

this appears on beta, but mostly for winxp, no alerts for win7/8:
http://graphs.mozilla.org/graph.html#tests=[[315,53,37],[315,52,37]]&sel=1423519087992.826,1428067435963,393.44262295081967,600&displayrange=90&datatype=geo