Bug: Intermittent TEST-UNEXPECTED-TIMEOUT | browser/base/content/test/performance/browser_tabdetach.js | application timed out after 370 seconds with no output
Status: RESOLVED
Priority: P5
Resolution: DUPLICATE
Created: 2021-03-31 09:59:21+00:00
Resolved: 2022-07-27 18:36:12+00:00

**Filed by:** abutkovits [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=335002680&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/ee-qnUcKT4eIrQE5m9ayIQ/runs/1/artifacts/public/logs/live_backing.log

---
```
[task 2021-03-31T09:04:51.096Z] 09:04:51     INFO - TEST-START | browser/base/content/test/performance/browser_tabdetach.js
[task 2021-03-31T09:11:11.550Z] 09:11:10     INFO - Buffered messages logged at 09:04:51
[task 2021-03-31T09:11:13.140Z] 09:11:12     INFO - Entering test bound test_detach_not_overflowed
[task 2021-03-31T09:11:14.979Z] 09:11:13     INFO - Buffered messages logged at 09:04:57
[task 2021-03-31T09:11:18.032Z] 09:11:17     INFO - TEST-FAIL | browser/base/content/test/performance/browser_tabdetach.js | known reflow at clientX@chrome://browser/content/tabbrowser-tabs.js was encountered 2 times - 
[task 2021-03-31T09:11:22.303Z] 09:11:21     INFO - Full stack:
[task 2021-03-31T09:11:24.051Z] 09:11:21     INFO -   clientX@chrome://browser/content/tabbrowser-tabs.js:497:20
[task 2021-03-31T09:11:25.570Z] 09:11:22     INFO -   on_dragstart@chrome://browser/content/tabbrowser-tabs.js:499:31
[task 2021-03-31T09:11:27.060Z] 09:11:22     INFO -   handleEvent@chrome://browser/content/tabbrowser-tabs.js:1740:29
[task 2021-03-31T09:11:29.295Z] 09:11:23     INFO -   synthesizeMouseAtPoint@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:574:32
[task 2021-03-31T09:11:31.069Z] 09:11:23     INFO -   synthesizeMouse@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:508:10
[task 2021-03-31T09:11:32.805Z] 09:11:24     INFO -   synthesizePlainDragAndDrop@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:3059:22
[task 2021-03-31T09:11:34.457Z] 09:11:24     INFO -   
[task 2021-03-31T09:11:36.147Z] 09:11:26     INFO - Full stack:
[task 2021-03-31T09:11:37.658Z] 09:11:26     INFO -   clientX@chrome://browser/content/tabbrowser-tabs.js:497:20
[task 2021-03-31T09:11:39.344Z] 09:11:27     INFO -   on_dragstart@chrome://browser/content/tabbrowser-tabs.js:499:39
[task 2021-03-31T09:11:41.678Z] 09:11:28     INFO -   handleEvent@chrome://browser/content/tabbrowser-tabs.js:1740:29
[task 2021-03-31T09:11:42.992Z] 09:11:29     INFO -   synthesizeMouseAtPoint@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:574:32
[task 2021-03-31T09:11:44.514Z] 09:11:30     INFO -   synthesizeMouse@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:508:10
[task 2021-03-31T09:11:46.375Z] 09:11:31     INFO -   synthesizePlainDragAndDrop@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:3059:22
[task 2021-03-31T09:11:47.952Z] 09:11:33     INFO -   
[task 2021-03-31T09:11:50.167Z] 09:11:34     INFO - TEST-FAIL | browser/base/content/test/performance/browser_tabdetach.js | known reflow at on_dragstart@chrome://browser/content/tabbrowser-tabs.js was encountered 1 times - 
[task 2021-03-31T09:11:51.857Z] 09:11:36     INFO - Full stack:
[task 2021-03-31T09:11:53.444Z] 09:11:37     INFO -   on_dragstart@chrome://browser/content/tabbrowser-tabs.js:503:9
[task 2021-03-31T09:11:55.667Z] 09:11:37     INFO -   handleEvent@chrome://browser/content/tabbrowser-tabs.js:1740:29
[task 2021-03-31T09:11:57.633Z] 09:11:38     INFO -   synthesizeMouseAtPoint@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:574:32
[task 2021-03-31T09:11:59.356Z] 09:11:39     INFO -   synthesizeMouse@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:508:10
[task 2021-03-31T09:12:01.952Z] 09:11:40     INFO -   synthesizePlainDragAndDrop@chrome://mochikit/content/tests/SimpleTest/EventUtils.js:3059:22
[task 2021-03-31T09:12:03.607Z] 09:11:41     INFO -   
[task 2021-03-31T09:12:05.082Z] 09:11:43     INFO - TEST-PASS | browser/base/content/test/performance/browser_tabdetach.js | 0 unexpected reflows - true == true - 
[task 2021-03-31T09:12:06.995Z] 09:11:45     INFO - comparing 3 frames
[task 2021-03-31T09:12:08.864Z] 09:11:54     INFO - TEST-PASS | browser/base/content/test/performance/browser_tabdetach.js | should have 0 unknown flickering areas - 
[task 2021-03-31T09:12:11.388Z] 09:12:03     INFO - Leaving test bound test_detach_not_overflowed
[task 2021-03-31T09:12:13.529Z] 09:12:12     INFO - Entering test bound test_detach_overflowed
[task 2021-03-31T09:12:16.675Z] 09:12:15     INFO - TEST-PASS | browser/base/content/test/performance/browser_tabdetach.js | Tabstrip needs to be wide enough to accomodate at least 1 more tab without overflowing. - true == true - 
[task 2021-03-31T09:12:20.328Z] 09:12:19     INFO - Buffered messages finished
[task 2021-03-31T09:12:24.045Z] 09:12:23    ERROR - TEST-UNEXPECTED-TIMEOUT | browser/base/content/test/performance/browser_tabdetach.js | application timed out after 370 seconds with no output```