Bug: Intermittent browser/components/preferences/tests/browser_moreFromMozilla.js | After filtering we must have the expected number of events. - 4 == 2 - JS frame :: resource://testing-common/TelemetryTestUtils.jsm :: assertEvents :: line 182
Status: RESOLVED
Priority: P5
Resolution: DUPLICATE
Created: 2021-11-19 21:31:11+00:00
Resolved: 2022-07-26 00:13:22+00:00

**Filed by:** ctuns [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=358662078&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/DfBAa60iQLChXUvFWSeUvg/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2021-11-19T20:58:33.623Z] 20:58:33     INFO - TEST-PASS | browser/components/preferences/tests/browser_moreFromMozilla.js | parent must be in snapshot. Has [parent]. - true == true - 
[task 2021-11-19T20:58:33.625Z] 20:58:33     INFO - Buffered messages finished
[task 2021-11-19T20:58:33.627Z] 20:58:33     INFO - TEST-UNEXPECTED-FAIL | browser/components/preferences/tests/browser_moreFromMozilla.js | After filtering we must have the expected number of events. - 4 == 2 - JS frame :: resource://testing-common/TelemetryTestUtils.jsm :: assertEvents :: line 182
[task 2021-11-19T20:58:33.627Z] 20:58:33     INFO - Stack trace:
[task 2021-11-19T20:58:33.628Z] 20:58:33     INFO - resource://testing-common/TelemetryTestUtils.jsm:assertEvents:182
[task 2021-11-19T20:58:33.628Z] 20:58:33     INFO - resource://testing-common/TelemetryTestUtils.jsm:assertNumberOfEvents:100
[task 2021-11-19T20:58:33.628Z] 20:58:33     INFO - chrome://mochitests/content/browser/browser/components/preferences/tests/browser_moreFromMozilla.js:test_aboutpreferences_event_telemetry:88
[task 2021-11-19T20:58:33.630Z] 20:58:33     INFO - GECKO(2574) | [Parent 2574, Main Thread] WARNING: '!inner', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorProtocol.cpp:184
[task 2021-11-19T20:58:33.631Z] 20:58:33     INFO - GECKO(2574) | [Parent 2574, Main Thread] WARNING: '!inner', file /builds/worker/checkouts/gecko/dom/ipc/jsactor/JSWindowActorProtocol.cpp:184
[task 2021-11-19T20:58:33.632Z] 20:58:33     INFO - Leaving test bound test_aboutpreferences_event_telemetry
[task 2021-11-19T20:58:33.633Z] 20:58:33     INFO - GECKO(2574) | MEMORY STAT | vsize 3705MB | residentFast 615MB | heapAllocated 281MB
[task 2021-11-19T20:58:33.634Z] 20:58:33     INFO - TEST-OK | browser/components/preferences/tests/browser_moreFromMozilla.js | took 6949ms
[task 2021-11-19T20:58:33.635Z] 20:58:33     INFO - GECKO(2574) | [Child 2808: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7fe6115db800 == 1 [pid = 2808] [id = 72]
[task 2021-11-19T20:58:33.635Z] 20:58:33     INFO - GECKO(2574) | [Child 2808: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (7fe62b87c200) [pid = 2808] [serial = 147] [outer = 0]
[task 2021-11-19T20:58:33.636Z] 20:58:33     INFO - GECKO(2574) | [Child 2808: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 4 (7fe6115dc000) [pid = 2808] [serial = 148] [outer = 7fe62b87c200]
[task 2021-11-19T20:58:33.643Z] 20:58:33     INFO - checking window state
[task 2021-11-19T20:58:33.645Z] 20:58:33     INFO - TEST-START | browser/components/preferences/tests/browser_newtab_menu.js
```