Bug 196403 - [ Mac WK2 iOS Sim ] Layout Test imported/w3c/web-platform-tests/mediacapture-record/MediaRecorder-stop.html is a flaky failure
Summary: [ Mac WK2 iOS Sim ] Layout Test imported/w3c/web-platform-tests/mediacapture-...
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Tools / Tests (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
Keywords: InRadar
: 217538 (view as bug list)
Depends on:
Reported: 2019-03-29 11:59 PDT by Shawn Roberts
Modified: 2020-12-18 05:59 PST (History)
7 users (show)

See Also:


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Description Shawn Roberts 2019-03-29 11:59:20 PDT
The following layout test is failing on Mac WK2 Release and Debug, iOS Simulator Release and Debug


Probable cause:

Test has been flaky its entire history on the dashboard. Local testing fails on on various versions from when the test was imported in https://trac.webkit.org/changeset/237311/webkit and reported flaky then.

Test was modified and fixed in https://trac.webkit.org/changeset/237642/webkit and reported flaky then as well.

Test recently started showing up in iOS queue's, but testing with older revisions for iOS up until r237642 fail as well.

Fails on average 2 times in 500 iterations.

Reproduced with :

run-webkit-tests imported/w3c/web-platform-tests/mediacapture-record/MediaRecorder-stop.html --iterations 500 -f

Flakiness Dashboard:



--- /Volumes/Data/slave/ios-simulator-12-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/mediacapture-record/MediaRecorder-stop-expected.txt
+++ /Volumes/Data/slave/ios-simulator-12-release-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/mediacapture-record/MediaRecorder-stop-actual.txt
@@ -1,4 +1,6 @@
+Harness Error (TIMEOUT), message = null
 PASS MediaRecorder will stop recording and fire a stop event when all tracks are ended 
-PASS MediaRecorder will stop recording and fire a stop event when stop() is called 
+TIMEOUT MediaRecorder will stop recording and fire a stop event when stop() is called Test timed out
Comment 1 Radar WebKit Bug Importer 2019-03-29 12:00:28 PDT
Comment 2 Shawn Roberts 2019-03-29 13:24:23 PDT
Marked flaky in https://trac.webkit.org/changeset/243659/webkit
Comment 3 youenn fablet 2020-12-18 05:59:18 PST
*** Bug 217538 has been marked as a duplicate of this bug. ***