Filed by: ccozmuta [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=380037377&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/FwGVg6FZQL-QqWxTK9Q0cA/runs/0/artifacts/public/logs/live_backing.log
Reftest URL: https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/FwGVg6FZQL-QqWxTK9Q0cA/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

[task 2022-06-02T15:32:52.158Z] 15:32:52     INFO - TEST-PASS | devtools/client/netmonitor/test/browser_net_pause.js | There should be no activity when paused. - 
[task 2022-06-02T15:32:52.159Z] 15:32:52     INFO - TEST-PASS | devtools/client/netmonitor/test/browser_net_pause.js | There should be correct number of requests - 
[task 2022-06-02T15:32:52.159Z] 15:32:52     INFO - TEST-PASS | devtools/client/netmonitor/test/browser_net_pause.js | The pause button is correctly in the resumed state - 
[task 2022-06-02T15:32:52.160Z] 15:32:52     INFO - Console message: [JavaScript Error: "Cookie “bob” has “SameSite” policy set to “Lax” because it is missing a “SameSite” attribute, and “SameSite=Lax” is the default value for this attribute." {file: "http://example.com/browser/devtools/client/netmonitor/test/sjs_simple-test-server.sjs?id=2" line: 0}]
[task 2022-06-02T15:32:52.162Z] 15:32:52     INFO - Console message: [JavaScript Error: "Cookie “tom” has “SameSite” policy set to “Lax” because it is missing a “SameSite” attribute, and “SameSite=Lax” is the default value for this attribute." {file: "http://example.com/browser/devtools/client/netmonitor/test/sjs_simple-test-server.sjs?id=2" line: 0}]
[task 2022-06-02T15:32:52.162Z] 15:32:52     INFO - Console message: [JavaScript Error: "Cookie “bob” has “SameSite” policy set to “Lax” because it is missing a “SameSite” attribute, and “SameSite=Lax” is the default value for this attribute." {file: "http://example.com/browser/devtools/client/netmonitor/test/sjs_simple-test-server.sjs?id=2" line: 0}]
[task 2022-06-02T15:32:52.163Z] 15:32:52     INFO - Console message: [JavaScript Error: "Cookie “tom” has “SameSite” policy set to “Lax” because it is missing a “SameSite” attribute, and “SameSite=Lax” is the default value for this attribute." {file: "http://example.com/browser/devtools/client/netmonitor/test/sjs_simple-test-server.sjs?id=2" line: 0}]
[task 2022-06-02T15:32:52.164Z] 15:32:52     INFO - Buffered messages finished
[task 2022-06-02T15:32:52.164Z] 15:32:52     INFO - TEST-UNEXPECTED-FAIL | devtools/client/netmonitor/test/browser_net_pause.js | Test timed out - 
[task 2022-06-02T15:32:52.165Z] 15:32:52     INFO - Removing tab.
[task 2022-06-02T15:32:52.166Z] 15:32:52     INFO - Waiting for event: 'TabClose' on [object XULElement].
[task 2022-06-02T15:32:52.166Z] 15:32:52     INFO - Got event: 'TabClose' on [object XULElement].
[task 2022-06-02T15:32:52.167Z] 15:32:52     INFO - Tab removed and finished closing
[task 2022-06-02T15:32:52.167Z] 15:32:52     INFO - GECKO(11106) | JavaScript error: , line 0: NotFoundError: No such JSWindowActor 'DevToolsFrame'
[task 2022-06-02T15:32:52.168Z] 15:32:52     INFO - TEST-PASS | devtools/client/netmonitor/test/browser_net_pause.js | The main process DevToolsServer has no pending connection when the test ends - 
[task 2022-06-02T15:32:52.169Z] 15:32:52     INFO - finish() was called, cleaning up...
[task 2022-06-02T15:32:52.169Z] 15:32:52     INFO - Console message: [JavaScript Error: "NotFoundError: No such JSWindowActor 'DevToolsFrame'"]
[task 2022-06-02T15:32:52.170Z] 15:32:52     INFO - GECKO(11106) | MEMORY STAT | vsize 3324MB | residentFast 520MB | heapAllocated 239MB
[task 2022-06-02T15:32:52.170Z] 15:32:52     INFO - TEST-OK | devtools/client/netmonitor/test/browser_net_pause.js | took 45282ms
[task 2022-06-02T15:32:52.171Z] 15:32:52     INFO - checking window state
[task 2022-06-02T15:32:52.189Z] 15:32:52     INFO - GECKO(11106) | Completed ShutdownLeaks collections in process 11106
[task 2022-06-02T15:32:52.191Z] 15:32:52     INFO - TEST-START | Shutdown

:bomsy, since you are the author of the regressor, bug 1764348, could you take a look?
For more information, please visit auto_nag documentation.

This started to fail on tier 1: https://treeherder.mozilla.org/logviewer?job_id=380048019&repo=autoland&lineNumber=3943

Fixed by backout - backout link

Can you please take a look at this failure : https://treeherder.mozilla.org/jobs?repo=autoland&group_state=expanded&resultStatus=success%2Ctestfailed%2Cbusted%2Cexception%2Crunnable&fromchange=d193aa033e1e6bdcad73c87b4211774d817eedc0&searchStr=dt&test_paths=devtools%2Fclient%2Fnetmonitor%2Ftest%2F&tochange=834b97c18cfbb4d775934b464741e292dc59ee74&selectedTaskRun=GyCFf4RNRom9H_OGNPlpNA.0

It started failing again with the landing of https://bugzilla.mozilla.org/show_bug.cgi?id=1764348.
And it's starting to be frequent !

Thanks will take a look.

https://hg.mozilla.org/mozilla-central/rev/e0d328cd054b

This is still failing on nightly

Changing the pattern for toggling recording to ensure that pause/resumes actually
start or stops watching resources before the ui states gets updated.

https://hg.mozilla.org/mozilla-central/rev/6be112a33fb5

== Change summary for alert #34465 (as of Tue, 14 Jun 2022 11:05:56 GMT) ==

Improvements:

For up to date results, see: https://treeherder.mozilla.org/perfherder/alerts?id=34465

Thanks for perf summary alert.
I'm wondering ... Its unlikely that this fix would have caused this perf improvements. The changes here are mainly devtools related.

Thanks