2050519 - Frequent TestWebrtcVideoEncoderFactory.RacyGmpPluginForwards | Expected equality of these values: | single tracking bug

Status: RESOLVED FIXED

(Core :: Audio/Video: GMP, defect, P2)

Description

[Treeherder Bug Filer]

Filed by: sstanca [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=574995913&repo=autoland&task=GNOy55sPR_CJds8m9tvGhA.0
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/GNOy55sPR_CJds8m9tvGhA/runs/0/artifacts/public/logs/live_backing.log

---

[task 2026-06-25T14:13:09.073+00:00] 14:13:09     INFO - TEST-PASS | TestWebrtcVideoDecoderFactory.RacyGmpPluginForwards | took 309ms
[task 2026-06-25T14:13:09.074+00:00] 14:13:09     INFO - SUITE-END | took 0s
[task 2026-06-25T14:13:09.081+00:00] 14:13:09     INFO -  Finished running GTest tests.
[task 2026-06-25T14:13:09.092+00:00] 14:13:09     INFO - gtest.TestWebrtcVideoDecoderFactory | process wait complete, returncode=0
[task 2026-06-25T14:13:09.092+00:00] 14:13:09     INFO -  mozcrash checking /opt/worker/tasks/task_178239485218235/build/tests/gtest for minidumps...
[task 2026-06-25T14:13:09.176+00:00] 14:13:09     INFO -  *** You are running in headless mode.
[task 2026-06-25T14:13:09.277+00:00] 14:13:09     INFO -  Running GTest tests...
[task 2026-06-25T14:13:09.561+00:00] 14:13:09     INFO -  Setting up crash reporting
[task 2026-06-25T14:13:09.580+00:00] 14:13:09     INFO - SUITE-START | Running 0 tests
[task 2026-06-25T14:13:09.581+00:00] 14:13:09     INFO - TEST-START | TestWebrtcVideoEncoderFactory.RacyGmpPluginForwards
[task 2026-06-25T14:13:09.592+00:00] 14:13:09     INFO - TEST-UNEXPECTED-FAIL | TestWebrtcVideoEncoderFactory.RacyGmpPluginForwards | Expected equality of these values:
[task 2026-06-25T14:13:09.592+00:00] 14:13:09     INFO -   h264GmpSupport
[task 2026-06-25T14:13:09.592+00:00] 14:13:09     INFO -     Which is: 8-byte object <00-00 00-00 00-00 00-00>
[task 2026-06-25T14:13:09.592+00:00] 14:13:09     INFO -   media::EncodeSupportSet{media::EncodeSupport::SoftwareEncode}
[task 2026-06-25T14:13:09.592+00:00] 14:13:09     INFO -     Which is: 8-byte object <01-00 00-00 00-00 00-00>
[task 2026-06-25T14:13:09.592+00:00] 14:13:09     INFO - 
[task 2026-06-25T14:13:09.592+00:00] 14:13:09     INFO - ./../../../../../checkouts/gecko/dom/media/gtest/TestWebrtcCodecFactory.cpp:83
[task 2026-06-25T14:13:09.593+00:00] 14:13:09     INFO - TEST-UNEXPECTED-FAIL | TestWebrtcVideoEncoderFactory.RacyGmpPluginForwards | expected PASS
[task 2026-06-25T14:13:09.593+00:00] 14:13:09     INFO - TEST-INFO took 11ms
[task 2026-06-25T14:13:09.593+00:00] 14:13:09     INFO - SUITE-END | took 0s
[task 2026-06-25T14:13:09.600+00:00] 14:13:09     INFO -  Finished running GTest tests.
[task 2026-06-25T14:13:09.632+00:00] 14:13:09     INFO - gtest.TestWebrtcVideoEncoderFactory | process wait complete, returncode=1
[task 2026-06-25T14:13:09.633+00:00] 14:13:09     INFO -  mozcrash checking /opt/worker/tasks/task_178239485218235/build/tests/gtest for minidumps...
[task 2026-06-25T14:13:09.633+00:00] 14:13:09    ERROR - gtest.TestWebrtcVideoEncoderFactory | test failed with return code 1
[task 2026-06-25T14:13:09.637+00:00] 14:13:09     INFO - rungtests.py exits with code 1
[task 2026-06-25T14:13:09.658+00:00] 14:13:09     INFO - Return code: 1
[task 2026-06-25T14:13:09.658+00:00] 14:13:09  WARNING - Got 2 unexpected statuses
[task 2026-06-25T14:13:09.658+00:00] 14:13:09     INFO - TinderboxPrint: gtest-gtest<br/>4547/<em class="testfail">2</em>/3
[task 2026-06-25T14:13:09.658+00:00] 14:13:09  WARNING - setting return code to 2
[task 2026-06-25T14:13:09.658+00:00] 14:13:09     INFO - The gtest suite: gtest ran with return status: FAILURE
[task 2026-06-25T14:13:09.659+00:00] 14:13:09     INFO - Running post-action listener: _package_coverage_data
[task 2026-06-25T14:13:09.659+00:00] 14:13:09     INFO - Running post-action listener: _resource_record_post_action
[task 2026-06-25T14:13:09.659+00:00] 14:13:09     INFO - Running post-action listener: process_java_coverage_data
[task 2026-06-25T14:13:09.659+00:00] 14:13:09     INFO - [mozharness: 2026-06-25 14:13:09.659268Z] Finished run-tests step (success)
[task 2026-06-25T14:13:09.659+00:00] 14:13:09     INFO - [mozharness: 2026-06-25 14:13:09.659308Z] Running uninstall step.
[task 2026-06-25T14:13:09.659+00:00] 14:13:09     INFO - Running pre-action listener: _resource_record_pre_action
[task 2026-06-25T14:13:09.659+00:00] 14:13:09     INFO - Running main action method: uninstall
[task 2026-06-25T14:13:09.659+00:00] 14:13:09     INFO - Skipping uninstall for non-MSIX test
[task 2026-06-25T14:13:09.659+00:00] 14:13:09     INFO - Running post-action listener: _resource_record_post_action
[task 2026-06-25T14:13:09.659+00:00] 14:13:09     INFO - [mozharness: 2026-06-25 14:13:09.659527Z] Finished uninstall step (success)
[task 2026-06-25T14:13:09.660+00:00] 14:13:09     INFO - Running post-run listener: _resource_record_post_run
[task 2026-06-25T14:13:09.813+00:00] 14:13:09     INFO - instance_metadata.json not found; unable to determine instance type
[task 2026-06-25T14:13:09.833+00:00] 14:13:09     INFO - Validating Perfherder data against /opt/worker/tasks/task_178239485218235/mozharness/external_tools/performance-artifact-schema.json
[task 2026-06-25T14:13:09.835+00:00] 14:13:09     INFO - PERFHERDER_DATA: {"framework": {"name": "job_resource_usage"}, "suites": [{"name": "gtest.gtest.overall", "extraOptions": ["buildbot-unknown"], "subtests": [{"name": "cpu_percent", "value": 18.910298067758454}, {"name": "io_write_bytes", "value": 1291821056}, {"name": "io.read_bytes", "value": 1750843392}, {"name": "io_write_time", "value": 4788}, {"name": "io_read_time", "value": 45491}]}, {"name": "gtest.gtest.start-pulseaudio", "subtests": [{"name": "time", "value": 0.00020499600009316055}, {"name": "cpu_percent", "value": 0}]}, {"name": "gtest.gtest.unlock-keyring", "subtests": [{"name": "time", "value": 9.516700015410606e-05}, {"name": "cpu_percent", "value": 0}]}, {"name": "gtest.gtest.install", "subtests": [{"name": "time", "value": 29.008573225999953}, {"name": "cpu_percent", "value": 17.42575757575758}]}, {"name": "gtest.gtest.stage-files", "subtests": [{"name": "time", "value": 0.14028846899987002}, {"name": "cpu_percent", "value": 13.700000000000001}]}, {"name": "gtest.gtest.run-tests", "subtests": [{"name": "time", "value": 745.98151755}, {"name": "cpu_percent", "value": 18.970058519018703}]}, {"name": "gtest.gtest.uninstall", "subtests": [{"name": "time", "value": 0.00011461200006124272}, {"name": "cpu_percent", "value": 0}]}]}
[task 2026-06-25T14:13:09.836+00:00] 14:13:09     INFO - Total resource usage - Wall time: 775s; CPU: Can't collect data; Read bytes: 1750843392; Write bytes: 1291821056; Read time: 45491; Write time: 4788
[task 2026-06-25T14:13:09.836+00:00] 14:13:09     INFO - Total resource usage - Wall time: 775s; CPU: Can't collect data; Read bytes: 1750843392; Write bytes: 1291821056; Read time: 45491; Write time: 4788
[task 2026-06-25T14:13:09.836+00:00] 14:13:09     INFO - TinderboxPrint: I/O read bytes / time<br/>1,750,843,392 / 45,491
[task 2026-06-25T14:13:09.836+00:00] 14:13:09     INFO - TinderboxPrint: I/O write bytes / time<br/>1,291,821,056 / 4,788
[task 2026-06-25T14:13:09.836+00:00] 14:13:09     INFO - TinderboxPrint: CPU idle<br/>7,508.8 (81.0%)
[task 2026-06-25T14:13:09.836+00:00] 14:13:09     INFO - TinderboxPrint: CPU system<br/>742.5 (8.0%)
[task 2026-06-25T14:13:09.836+00:00] 14:13:09     INFO - TinderboxPrint: CPU user<br/>1,016.7 (11.0%)
[task 2026-06-25T14:13:09.836+00:00] 14:13:09     INFO - TinderboxPrint: Swap in / out<br/>669,433,856 / 0
[task 2026-06-25T14:13:09.838+00:00] 14:13:09     INFO - start-pulseaudio - Wall time: 0s; CPU: Can't collect data; Read bytes: 0; Write bytes: 0; Read time: 0; Write time: 0
[task 2026-06-25T14:13:09.839+00:00] 14:13:09     INFO - unlock-keyring - Wall time: 0s; CPU: Can't collect data; Read bytes: 0; Write bytes: 0; Read time: 0; Write time: 0
[task 2026-06-25T14:13:09.842+00:00] 14:13:09     INFO - install - Wall time: 29s; CPU: 17%; Read bytes: 517463040; Write bytes: 386940928; Read time: 29725; Write time: 608
[task 2026-06-25T14:13:09.844+00:00] 14:13:09     INFO - stage-files - Wall time: 0s; CPU: 14%; Read bytes: 491520; Write bytes: 225017856; Read time: 80; Write time: 376
[task 2026-06-25T14:13:09.897+00:00] 14:13:09     INFO - run-tests - Wall time: 746s; CPU: 19%; Read bytes: 1614086144; Write bytes: 679833600; Read time: 41639; Write time: 3804
[task 2026-06-25T14:13:09.900+00:00] 14:13:09     INFO - uninstall - Wall time: 0s; CPU: Can't collect data; Read bytes: 0; Write bytes: 0; Read time: 0; Write time: 0
[task 2026-06-25T14:13:10.761+00:00] 14:13:10  WARNING - returning nonzero exit status 2
[taskcluster 2026-06-25T14:13:10.885Z]    Exit Code: 2
[taskcluster 2026-06-25T14:13:10.885Z]    User Time: 11m44.908882s
[taskcluster 2026-06-25T14:13:10.885Z]  Kernel Time: 5m47.524064s
[taskcluster 2026-06-25T14:13:10.885Z]    Wall Time: 13m57.94327s
[taskcluster 2026-06-25T14:13:10.885Z]       Result: FAILED
[taskcluster 2026-06-25T14:13:10.885Z] === Task Finished ===
[taskcluster 2026-06-25T14:13:10.885Z] Task Duration: 13m57.948089s
[taskcluster 2026-06-25T14:13:11.164Z] Uploading artifact public/build/perfherder-data-mozharness-actions.json from file /opt/worker/tasks/task_178239485218235/public/build/perfherder-data-mozharness-actions.json with content encoding "gzip", mime type "application/json" and expiry 2027-06-25T13:46:26.737Z
[taskcluster 2026-06-25T14:13:11.495Z] Uploading artifact public/logs/localconfig.json from file /opt/worker/tasks/task_178239485218235/logs/localconfig.json with content encoding "gzip", mime type "application/json" and expiry 2027-06-25T13:46:26.737Z
[taskcluster 2026-06-25T14:13:11.826Z] Uploading artifact public/test_info/perfherder-data-gtest.json from file /opt/worker/tasks/task_178239485218235/build/blobber_upload_dir/perfherder-data-gtest.json with content encoding "gzip", mime type "application/json" and expiry 2027-06-25T13:46:26.737Z
[taskcluster 2026-06-25T14:13:12.125Z] Uploading artifact public/test_info/perfherder-data-resource-usage.json from file /opt/worker/tasks/task_178239485218235/build/blobber_upload_dir/perfherder-data-resource-usage.json with content encoding "gzip", mime type "application/json" and expiry 2027-06-25T13:46:26.737Z
[taskcluster 2026-06-25T14:13:12.433Z] Uploading artifact public/test_info/profile_resource-usage.json from file /opt/worker/tasks/task_178239485218235/build/blobber_upload_dir/profile_resource-usage.json with content encoding "gzip", mime type "application/json" and expiry 2027-06-25T13:46:26.737Z
[taskcluster 2026-06-25T14:13:12.852Z] Uploading artifact public/test_info/system-info.log from file /opt/worker/tasks/task_178239485218235/build/blobber_upload_dir/system-info.log with content encoding "gzip", mime type "text/plain" and expiry 2027-06-25T13:46:26.737Z
[taskcluster 2026-06-25T14:13:13.154Z] Uploading artifact public/fetch/perfherder-data-fetch-content.json from file /opt/worker/tasks/task_178239485218235/perf/perfherder-data-fetch-content.json with content encoding "gzip", mime type "application/json" and expiry 2027-06-25T13:46:26.737Z
[taskcluster 2026-06-25T14:13:13.365Z] [mounts] Preserving cache: Moving "/opt/worker/tasks/task_178239485218235/.task-cache/pip" to "/opt/worker/cache/NegwMQsORCC5YTREM5ReAw"
[taskcluster 2026-06-25T14:13:13.366Z] [mounts] Preserving cache: Moving "/opt/worker/tasks/task_178239485218235/.task-cache/uv" to "/opt/worker/cache/KAjmBa4TTPGNM45VYcgxog"
[taskcluster 2026-06-25T14:13:13.476Z] Uploading link artifact public/logs/live.log to artifact public/logs/live_backing.log with expiry 2027-06-25T13:46:26.737Z
[taskcluster:error] exit status 2

Comment 2

[Intermittent Failures Robot]

16 failures were associated with this bug yesterday.

Repository breakdown:

• autoland: 16

Table

	1proc
macosx1470-x86_64/debug	11
macosx1470-x86_64/opt	4
windows11-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-06-25&endday=2026-06-25&tree=all

Comment 3

[Intermittent Failures Robot]

30 failures were associated with this bug in the last 7 days.

This failure happened more than 30 times this week! Resolving this bug is a high priority.

Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled.

Repository breakdown:

• autoland: 29
• mozilla-central: 1

Table

	1proc
macosx1470-x86_64/debug	20
macosx1470-x86_64/opt	9
windows11-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-06-22&endday=2026-06-28&tree=all

Comment 4

[BugBot [:suhaib / :marco]]

:dbaker, since you are the author of the regressor, bug 2025517, could you take a look?

For more information, please visit BugBot documentation.

Comment 5

[Andreas Pehrson [:pehrsons]]

I wonder if bug 2048566 may help.

Comment 6

[Intermittent Failures Robot]

50 failures were associated with this bug in the last 7 days.
This is the #50 most frequent failure this week.

This failure happened more than 30 times this week! Resolving this bug is a high priority.

Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled.

Repository breakdown:

• autoland: 43
• try: 2
• mozilla-central: 5

Table

	1proc	swr
linux2404-x86_64/debug		1
macosx1470-x86_64/debug	34
macosx1470-x86_64/opt	10
windows10-x86_64/debug	1
windows11-x86/debug	1
windows11-x86_64/debug	3

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-06-29&endday=2026-07-05&tree=all

Comment 7

[Intermittent Failures Robot]

48 failures were associated with this bug in the last 7 days.

This failure happened more than 30 times this week! Resolving this bug is a high priority.

Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled.

Repository breakdown:

• autoland: 41
• try: 5
• mozilla-central: 2

Table

	1proc
macosx1470-x86_64/debug	22
macosx1470-x86_64/opt	15
windows10-x86_64/debug	6
windows11-x86/debug	1
windows11-x86_64/debug	4

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-07-06&endday=2026-07-12&tree=all

Comment 8

[Intermittent Failures Robot]

38 failures were associated with this bug in the last 7 days.

This failure happened more than 30 times this week! Resolving this bug is a high priority.

Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled.

Repository breakdown:

• autoland: 31
• try: 5
• mozilla-central: 2

Table

	1proc
macosx1470-x86_64/debug	26
macosx1470-x86_64/opt	10
windows10-x86_64/debug	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-07-13&endday=2026-07-19&tree=all

Comment 9

[Intermittent Failures Robot]

24 failures were associated with this bug yesterday.

Repository breakdown:

• autoland: 22
• try: 1
• mozilla-beta: 1

Table

	1proc
macosx1470-x86_64/debug	6
macosx1470-x86_64/opt	7
windows10-x86_64/debug	1
windows11-x86/debug	1
windows11-x86_64/asan	7
windows11-x86_64/debug	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-07-21&endday=2026-07-21&tree=all

Comment 10

[Intermittent Failures Robot]

18 failures were associated with this bug yesterday.

Repository breakdown:

• autoland: 17
• mozilla-central: 1

Table

	1proc
macosx1470-x86_64/debug	6
macosx1470-x86_64/opt	2
macosx1500-aarch64/opt	1
windows10-x86_64/debug	2
windows10-x86_64/opt	1
windows11-x86_64/asan	5
windows11-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-07-23&endday=2026-07-23&tree=all

Comment 11

[Intermittent Failures Robot]

76 failures were associated with this bug in the last 7 days.
This is the #38 most frequent failure this week.

This failure happened more than 75 times this week! Resolving this bug is a very high priority.

Try to resolve this bug as soon as possible. If unresolved for 1 week, the affected test(s) may be disabled.

Repository breakdown:

• autoland: 61
• mozilla-beta: 6
• try: 4
• mozilla-central: 5

Table

	1proc
macosx1470-x86_64/debug	24
macosx1470-x86_64/opt	16
macosx1500-aarch64/opt	3
windows10-x86_64/debug	4
windows10-x86_64/opt	2
windows11-x86/debug	1
windows11-x86_64/asan	18
windows11-x86_64/debug	8

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-07-20&endday=2026-07-26&tree=all

Comment 12

[Intermittent Failures Robot]

15 failures were associated with this bug yesterday.

Repository breakdown:

• autoland: 8
• mozilla-beta: 1
• mozilla-central: 5
• try: 1

Table

	1proc
macosx1470-x86_64/debug	4
macosx1500-aarch64/opt	2
windows10-x86_64/debug	1
windows11-x86_64/asan	8

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-07-27&endday=2026-07-27&tree=all

Comment 13

[Intermittent Failures Robot]

34 failures were associated with this bug yesterday.

Repository breakdown:

• autoland: 34

Table

	1proc
macosx1470-x86_64/debug	3
macosx1470-x86_64/opt	1
macosx1500-aarch64/debug	12
macosx1500-aarch64/opt	6
windows10-x86_64/debug	1
windows10-x86_64/opt	3
windows11-x86_64/asan	6
windows11-x86_64/debug	1
windows11-x86_64/opt	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-07-28&endday=2026-07-28&tree=all

Comment 14

[Intermittent Failures Robot]

45 failures were associated with this bug yesterday.

Repository breakdown:

• autoland: 41
• mozilla-central: 4

Table

	1proc
macosx1500-aarch64/debug	25
macosx1500-aarch64/opt	7
windows10-x86_64/debug	2
windows10-x86_64/opt	2
windows11-x86_64/asan	9

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-07-29&endday=2026-07-29&tree=all

Comment 15

[Intermittent Failures Robot]

36 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-beta: 2
• try: 1
• autoland: 31
• mozilla-central: 2

Table

	1proc
macosx1470-x86_64/debug	1
macosx1470-x86_64/opt	1
macosx1500-aarch64/debug	20
macosx1500-aarch64/opt	5
windows11-x86_64/asan	6
windows11-x86_64/debug	2
windows11-x86_64/opt	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-07-30&endday=2026-07-30&tree=all

Comment 16

[Intermittent Failures Robot]

33 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-beta: 1
• autoland: 28
• mozilla-central: 4

Table

	1proc
macosx1470-x86_64/opt	1
macosx1500-aarch64/debug	12
macosx1500-aarch64/opt	5
windows10-x86_64/debug	1
windows10-x86_64/opt	2
windows11-x86_64/asan	11
windows11-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-07-31&endday=2026-07-31&tree=all

Comment 17

[Intermittent Failures Robot]

173 failures were associated with this bug in the last 7 days.
This is the #14 most frequent failure this week.

This failure happened more than 75 times this week! Resolving this bug is a very high priority.

Try to resolve this bug as soon as possible. If unresolved for 1 week, the affected test(s) may be disabled.

Repository breakdown:

• mozilla-beta: 5
• autoland: 149
• try: 3
• mozilla-central: 16

Table

	1proc
macosx1470-x86_64/debug	8
macosx1470-x86_64/opt	4
macosx1500-aarch64/debug	70
macosx1500-aarch64/opt	26
windows10-x86_64/debug	5
windows10-x86_64/opt	9
windows11-x86/debug	1
windows11-x86_64/asan	42
windows11-x86_64/debug	4
windows11-x86_64/opt	4

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-07-27&endday=2026-08-02&tree=all

Comment 18

[Intermittent Failures Robot]

25 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-beta: 3
• autoland: 18
• mozilla-central: 3
• try: 1

Table

	1proc
macosx1470-x86_64/debug	1
macosx1470-x86_64/opt	2
macosx1500-aarch64/debug	8
macosx1500-aarch64/opt	2
windows10-x86_64/debug	1
windows10-x86_64/opt	1
windows11-x86_64/asan	9
windows11-x86_64/opt	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-03&endday=2026-08-03&tree=all

Comment 19

[Intermittent Failures Robot]

29 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-central: 2
• autoland: 25
• try: 2

Table

	1proc
macosx1500-aarch64/debug	11
macosx1500-aarch64/opt	5
windows10-x86_64/debug	1
windows11-x86_64/asan	10
windows11-x86_64/debug	1
windows11-x86_64/opt	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-04&endday=2026-08-04&tree=all

Comment 20

[Intermittent Failures Robot]

20 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-beta: 4
• autoland: 13
• try: 2
• mozilla-central: 1

Table

	1proc
macosx1470-x86_64/debug	3
macosx1500-aarch64/debug	8
windows10-x86_64/debug	1
windows11-x86_64/asan	6
windows11-x86_64/opt	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-05&endday=2026-08-05&tree=all

Comment 21

[Intermittent Failures Robot]

24 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-beta: 2
• autoland: 20
• mozilla-central: 2

Table

	1proc
macosx1470-x86_64/opt	2
macosx1500-aarch64/debug	11
windows10-x86_64/debug	1
windows10-x86_64/opt	2
windows11-x86_64/asan	7
windows11-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-06&endday=2026-08-06&tree=all

Comment 22

[Intermittent Failures Robot]

26 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-beta: 4
• autoland: 21
• mozilla-central: 1

Table

	1proc
macosx1470-x86_64/debug	1
macosx1470-x86_64/opt	3
macosx1500-aarch64/debug	9
macosx1500-aarch64/opt	3
windows10-x86_64/debug	2
windows11-x86_64/asan	6
windows11-x86_64/debug	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-07&endday=2026-08-07&tree=all

Comment 23

[Intermittent Failures Robot]

138 failures were associated with this bug in the last 7 days.
This is the #21 most frequent failure this week.

This failure happened more than 75 times this week! Resolving this bug is a very high priority.

Try to resolve this bug as soon as possible. If unresolved for 1 week, the affected test(s) may be disabled.

Repository breakdown:

• mozilla-beta: 15
• autoland: 106
• mozilla-central: 11
• try: 6

Table

	1proc
macosx1470-x86_64/debug	5
macosx1470-x86_64/opt	8
macosx1500-aarch64/debug	54
macosx1500-aarch64/opt	11
windows10-x86_64/debug	6
windows10-x86_64/opt	5
windows11-x86_64/asan	41
windows11-x86_64/debug	4
windows11-x86_64/opt	4

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-03&endday=2026-08-09&tree=all

Comment 24

[Intermittent Failures Robot]

33 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-beta: 7
• autoland: 25
• mozilla-central: 1

Table

	1proc
macosx1470-x86_64/debug	2
macosx1470-x86_64/opt	2
macosx1500-aarch64/debug	7
macosx1500-aarch64/opt	2
windows10-x86_64/opt	3
windows11-x86_64/asan	17

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-10&endday=2026-08-10&tree=all

Comment 25

[Intermittent Failures Robot]

18 failures were associated with this bug yesterday.

Repository breakdown:

• autoland: 16
• mozilla-central: 1
• mozilla-beta: 1

Table

	1proc
macosx1500-aarch64/debug	6
macosx1500-aarch64/opt	5
windows10-x86_64/opt	1
windows11-x86_64/asan	5
windows11-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-11&endday=2026-08-11&tree=all

Comment 26

[Intermittent Failures Robot]

29 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-beta: 1
• autoland: 25
• mozilla-central: 3

Table

	1proc
macosx1470-x86_64/debug	1
macosx1500-aarch64/debug	12
macosx1500-aarch64/opt	1
windows10-x86_64/opt	3
windows11-x86/opt	1
windows11-x86_64/asan	10
windows11-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-12&endday=2026-08-12&tree=all

Comment 27

[Intermittent Failures Robot]

24 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-release: 1
• autoland: 19
• mozilla-central: 2
• mozilla-beta: 1
• try: 1

Table

	1proc
macosx1470-x86_64/opt	1
macosx1500-aarch64/debug	7
macosx1500-aarch64/opt	2
windows10-x86_64/debug	1
windows11-x86_64/asan	12
windows11-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-13&endday=2026-08-13&tree=all

Comment 28

[Intermittent Failures Robot]

21 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-release: 1
• autoland: 18
• mozilla-central: 2

Table

	1proc
macosx1470-x86_64/opt	1
macosx1500-aarch64/debug	9
macosx1500-aarch64/opt	1
windows10-x86_64/debug	2
windows10-x86_64/opt	3
windows11-x86_64/asan	4
windows11-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-14&endday=2026-08-14&tree=all

Comment 29

[Intermittent Failures Robot]

135 failures were associated with this bug in the last 7 days.
This is the #22 most frequent failure this week.

This failure happened more than 75 times this week! Resolving this bug is a very high priority.

Try to resolve this bug as soon as possible. If unresolved for 1 week, the affected test(s) may be disabled.

Repository breakdown:

• mozilla-beta: 12
• mozilla-release: 2
• autoland: 107
• mozilla-central: 12
• try: 2

Table

	1proc
macosx1470-x86_64/debug	3
macosx1470-x86_64/opt	4
macosx1500-aarch64/debug	47
macosx1500-aarch64/opt	13
windows10-x86_64/debug	3
windows10-x86_64/opt	11
windows11-x86/opt	1
windows11-x86_64/asan	49
windows11-x86_64/debug	4

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-10&endday=2026-08-16&tree=all

Comment 30

[Intermittent Failures Robot]

25 failures were associated with this bug yesterday.

Repository breakdown:

• autoland: 22
• mozilla-beta: 2
• mozilla-central: 1

Table

	1proc
macosx1500-aarch64/debug	10
macosx1500-aarch64/opt	1
windows10-x86_64/debug	3
windows10-x86_64/opt	1
windows11-x86_64/asan	10

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-17&endday=2026-08-17&tree=all

Comment 31

[Andreas Pehrson [:pehrsons]]

It seems like bug 2025517 just exposed an issue rather than caused it.

Comment 32

[Andreas Pehrson [:pehrsons]]

The issue seems to be a race between setting mScannedPluginOnDisk (bug 1067216) after the calls to AddOnGMPThread which are async after Init since bug 1245789.

Comment 33

[Intermittent Failures Robot]

25 failures were associated with this bug yesterday.

Repository breakdown:

• autoland: 24
• mozilla-beta: 1

Table

	1proc
macosx1500-aarch64/debug	10
macosx1500-aarch64/opt	5
windows10-x86_64/debug	1
windows10-x86_64/opt	3
windows11-x86_64/asan	4
windows11-x86_64/debug	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-18&endday=2026-08-18&tree=all

Comment 34

[Andreas Pehrson [:pehrsons]]

Attachment: Bug 2050519 - Add a gtest covering GMP plugin visibility on the first query. r?#media-playback-reviewers

HasPluginForAPI() is meant to answer only once the scan of MOZ_GMP_PATH has
registered the plugins it found. Assert that, for both kinds of test plugin.

gmp-fake is queried first and has to stay first. It is described by a Chromium
manifest.json, and parsing that round trips to the main thread, so it is
registered a few tasks after the scan itself has run. Querying either of the
others first spins the event loop enough to hide the problem.

The test is kept alone in its suite so that it gets a process where nothing has
touched the GMP service yet.

Comment 35

[Andreas Pehrson [:pehrsons]]

Attachment: Bug 2050519 - Wait for GMP plugin registration before answering plugin queries. r?#media-playback-reviewers

EnsurePluginsOnDiskScanned() waited for the GMP thread to run a dummy runnable,
and took mScannedPluginOnDisk to mean the scan had finished. Neither is a barrier
for plugin registration: LoadFromEnvironment() sets that flag and returns while
the GMPParent::Init() promises it started are still in flight, and the plugins
those find are appended to mPlugins by later GMP thread tasks. HasPluginForAPI()
and FindPluginDirectoryForAPI() could therefore report a plugin as missing while
it was still being registered.

Wait on EnsureInitialized() instead, which is the barrier that already exists for
"LoadFromEnvironment() has completed", and drop mScannedPluginOnDisk.

On macOS and Windows, GMPParent::Init() also reads the plugin binary header to
check its architecture. That is enough extra work for the main thread to win the
race, which is why TestWebrtcVideoEncoderFactory.RacyGmpPluginForwards and
TestWebrtcVideoDecoderFactory.RacyGmpPluginForwards fail there but never on
Linux. Also fixes bug 2051008.

Comment 36

[Andreas Pehrson [:pehrsons]]

Attachment: Bug 2050519 - Settle the GMP init promise when the GMP thread goes away. r?#media-playback-reviewers

InitializePlugins() settles mInitPromise from the GMP thread. If the thread is
joined while the scan of MOZ_GMP_PATH is still in flight, the tasks that would
have settled it are dropped, and every EnsureInitialized() caller waits forever.

Settle it from the shutdown-threads observer instead, once the thread is gone.

Comment 37

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/3b5e77fcb1c3
https://hg.mozilla.org/integration/autoland/rev/4ac152409203
Add a gtest covering GMP plugin visibility on the first query. r=media-playback-reviewers,azebrowski
https://github.com/mozilla-firefox/firefox/commit/d6efb526a0f8
https://hg.mozilla.org/integration/autoland/rev/448513056450
Settle the GMP init promise when the GMP thread goes away. r=media-playback-reviewers,padenot
https://github.com/mozilla-firefox/firefox/commit/cdab661372fc
https://hg.mozilla.org/integration/autoland/rev/0eb2545c16f4
Wait for GMP plugin registration before answering plugin queries. r=media-playback-reviewers,azebrowski

Comment 38

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/4ac152409203
https://hg.mozilla.org/mozilla-central/rev/448513056450
https://hg.mozilla.org/mozilla-central/rev/0eb2545c16f4

Comment 39

[BugBot [:suhaib / :marco]]

Since nightly and release are affected, beta will likely be affected too.
For more information, please visit BugBot documentation.

Comment 40

[BugBot [:suhaib / :marco]]

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

• If yes, please nominate the patch for beta approval.
  • See https://wiki.mozilla.org/Release_Management/Requesting_an_Uplift for documentation on how to request an uplift.
• If no, please set status-firefox155 to wontfix.

For more information, please visit BugBot documentation.

Comment 41

[Andreas Pehrson [:pehrsons]]

This is a bug from close to the inception of GMP. In practice it seems to mainly affect GTests. It can ride.

Comment 42

[Intermittent Failures Robot]

113 failures were associated with this bug in the last 7 days.
This is the #38 most frequent failure this week.

This failure happened more than 75 times this week! Resolving this bug is a very high priority.

Try to resolve this bug as soon as possible. If unresolved for 1 week, the affected test(s) may be disabled.

Repository breakdown:

• mozilla-release: 4
• autoland: 91
• mozilla-beta: 13
• mozilla-central: 4
• try: 1

Table

	1proc
macosx1470-x86_64/opt	3
macosx1500-aarch64/debug	49
macosx1500-aarch64/opt	11
windows10-x86_64/debug	7
windows10-x86_64/opt	7
windows11-x86/debug	1
windows11-x86_64/asan	32
windows11-x86_64/debug	2
windows11-x86_64/opt	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-17&endday=2026-08-23&tree=all

Comment 43

[Intermittent Failures Robot]

4 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 3
• mozilla-release: 1

Table

	1proc
macosx1500-aarch64/debug	3
windows11-x86_64/asan	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=2050519&startday=2026-08-24&endday=2026-08-30&tree=all