1823281 - Intermittent dom/workers/test/test_dynamicImport.html | single tracking bug

Status: RESOLVED FIXED

(Core :: DOM: Workers, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: imoraru [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=409389029&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/WxTuuA-8T8Ku1zbM_zsoYQ/runs/0/artifacts/public/logs/live_backing.log

---

[task 2023-03-19T18:46:31.081Z] 18:46:31     INFO - TEST-START | dom/workers/test/test_dynamicImport.html
[task 2023-03-19T18:46:31.314Z] 18:46:31     INFO - TEST-INFO | started process screentopng
[task 2023-03-19T18:46:31.602Z] 18:46:31     INFO - TEST-INFO | screentopng: exit 0
[task 2023-03-19T18:46:31.603Z] 18:46:31     INFO - TEST-UNEXPECTED-FAIL | dom/workers/test/test_dynamicImport.html | second dynamic import returned 
[task 2023-03-19T18:46:31.603Z] 18:46:31     INFO -     SimpleTest.ok@SimpleTest/SimpleTest.js:421:16
[task 2023-03-19T18:46:31.604Z] 18:46:31     INFO -     worker.onmessage@dom/workers/test/test_dynamicImport.html:49:13
[task 2023-03-19T18:46:31.604Z] 18:46:31     INFO -     EventHandlerNonNull*@dom/workers/test/test_dynamicImport.html:35:5
[task 2023-03-19T18:46:31.604Z] 18:46:31     INFO - Not taking screenshot here: see the one that was previously logged
[task 2023-03-19T18:46:31.604Z] 18:46:31     INFO - TEST-UNEXPECTED-FAIL | dom/workers/test/test_dynamicImport.html | first dynamic import returned 
[task 2023-03-19T18:46:31.604Z] 18:46:31     INFO -     SimpleTest.ok@SimpleTest/SimpleTest.js:421:16
[task 2023-03-19T18:46:31.604Z] 18:46:31     INFO -     worker.onmessage@dom/workers/test/test_dynamicImport.html:38:13
[task 2023-03-19T18:46:31.605Z] 18:46:31     INFO -     EventHandlerNonNull*@dom/workers/test/test_dynamicImport.html:35:5
[task 2023-03-19T18:46:31.605Z] 18:46:31     INFO - TEST-PASS | dom/workers/test/test_dynamicImport.html | third dynamic import returned 
[task 2023-03-19T18:46:31.605Z] 18:46:31     INFO - Not taking screenshot here: see the one that was previously logged
[task 2023-03-19T18:46:31.605Z] 18:46:31     INFO - TEST-UNEXPECTED-FAIL | dom/workers/test/test_dynamicImport.html | third dynamic import returned 
[task 2023-03-19T18:46:31.605Z] 18:46:31     INFO -     SimpleTest.ok@SimpleTest/SimpleTest.js:421:16
[task 2023-03-19T18:46:31.605Z] 18:46:31     INFO -     worker.onmessage@dom/workers/test/test_dynamicImport.html:54:13
[task 2023-03-19T18:46:31.606Z] 18:46:31     INFO -     EventHandlerNonNull*@dom/workers/test/test_dynamicImport.html:35:5
[task 2023-03-19T18:46:31.606Z] 18:46:31     INFO - TEST-PASS | dom/workers/test/test_dynamicImport.html | second dynamic import returned 
[task 2023-03-19T18:46:31.606Z] 18:46:31     INFO - TEST-PASS | dom/workers/test/test_dynamicImport.html | first dynamic import returned 
[task 2023-03-19T18:46:31.607Z] 18:46:31     INFO - GECKO(3850) | MEMORY STAT | vsize 2564MB | residentFast 160MB | heapAllocated 10MB
[task 2023-03-19T18:46:31.609Z] 18:46:31     INFO - TEST-OK | dom/workers/test/test_dynamicImport.html | took 326ms
[task 2023-03-19T18:46:31.610Z] 18:46:31     INFO - TEST-START | dom/workers/test/test_dynamicImport_early_termination.html

Comment 1

[Intermittent Failures Robot]

1 failures in 3761 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1823281&startday=2023-03-13&endday=2023-03-19&tree=all

Comment 2

[Serban Stanca [:SerbanS]]

• First occurrence in this backfill range and retriggers: https://treeherder.mozilla.org/jobs?repo=autoland&group_state=expanded&searchStr=linux%2C18.04%2Cx64%2Cwebrender%2Cdebug%2Cmochitests%2Cwith%2Csoftware%2Cwebrender%2Cwithout%2Cfission%2Cenabled%2Ctest-linux1804-64-qr%2Fdebug-mochitest-plain-swr-nofis%2C1&tochange=6f43f2ca2f3b64b84e27c94159f283c73bf95c02&fromchange=f7701fbcbcbed8cf208c015fd8927c2ea8215949&selectedTaskRun=WxTuuA-8T8Ku1zbM_zsoYQ.0

Comment 3

[Jens Stutte [:jstutte]]

The test as a whole has been added just 14 days ago and the intermittent seems to be quite rare, so I would rather think, that the test has (or reveals) a problem that is independent from the backfill range? Maybe Yulia has an idea if it is worth to have a look here.

Comment 5

[BugBot [:suhaib / :marco/ :calixte]]

The following field has been copied from a duplicate bug:

Field	Value	Source
Regressed by	bug 1540913	bug 1822839

For more information, please visit auto_nag documentation.

Comment 6

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1540913

Comment 7

[Intermittent Failures Robot]

8 failures in 4161 pushes (0.002 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 6
• try: 2

Platform and build breakdown:

• linux1804-64-qr: 7
  • debug: 7
• linux1804-64-asan-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1823281&startday=2023-03-20&endday=2023-03-26&tree=all

Comment 8

[Yulia Startsev [:yulia]]

Attachment: Bug 1823281 - Adjust test expectation to account for reordering of dynamic imports; r=allstarschh

I didn't account for dynamic imports being potentially reordered, which appears to be possible. This
seems to have lead to the intermittent. This updates the two affected tests.

Comment 9

[Yoshi Cheng-Hao Huang [:allstars.chh][:allstarschh][:yoshi]]

Taking as Yulia will be on leave.

Comment 10

[Intermittent Failures Robot]

9 failures in 3863 pushes (0.002 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 9

Platform and build breakdown:

• linux1804-64-asan-qr: 4
  • opt: 4
• linux1804-64-qr: 5
  • debug: 5

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1823281&startday=2023-03-27&endday=2023-04-02&tree=all

Comment 11

[Intermittent Failures Robot]

5 failures in 3386 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 5

Platform and build breakdown:

• linux1804-64-asan-qr: 2
  • opt: 2
• linux1804-64-qr: 3
  • debug: 3

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1823281&startday=2023-04-03&endday=2023-04-09&tree=all

Comment 12

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1540913

Comment 13

[Intermittent Failures Robot]

6 failures in 3206 pushes (0.002 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 1
• try: 2
• autoland: 3

Platform and build breakdown:

• linux1804-64-ccov-qr: 1
  • opt: 1
• linux1804-64-qr: 5
  • debug: 5

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1823281&startday=2023-04-10&endday=2023-04-16&tree=all

Comment 14

[Intermittent Failures Robot]

2 failures in 4004 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1
• linux1804-64-shippable-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1823281&startday=2023-04-17&endday=2023-04-23&tree=all

Comment 15

[Intermittent Failures Robot]

2 failures in 3177 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 2

Platform and build breakdown:

• linux1804-64-tsan-qr: 1
  • opt: 1
• linux1804-64-asan-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1823281&startday=2023-04-24&endday=2023-04-30&tree=all

Comment 16

[Yoshi Cheng-Hao Huang [:allstars.chh][:allstarschh][:yoshi]]

Attachment: Bug 1823281: Remove redundant dynamic import.

The loading of dynamicImport_immediate.mjs sometimes takes longer than
the other module scripts and causes intermittent failures, since it
doesn't have dependencies on the other module scripts so we just simply
remove it.

Comment 17

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/21f719b86e70
Remove redundant dynamic import. r=jonco

Comment 18

[Noemi Erli[:noemi_erli]]

https://hg.mozilla.org/mozilla-central/rev/21f719b86e70

Comment 19

[BugBot [:suhaib / :marco/ :calixte]]

The patch landed in nightly and beta is affected.
:allstars.chh, is this bug important enough to require an uplift?

• If yes, please nominate the patch for beta approval.
• If no, please set status-firefox113 to wontfix.

For more information, please visit BugBot documentation.

Comment 20

[Yoshi Cheng-Hao Huang [:allstars.chh][:allstarschh][:yoshi]]

This is just updating the test, and its failure rate is quite low, so no need to uplift it, thanks.

Comment 21

[Intermittent Failures Robot]

2 failures in 3411 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 1
• autoland: 1

Platform and build breakdown:

• linux1804-64-qr: 2
  • debug: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1823281&startday=2023-05-01&endday=2023-05-07&tree=all