Bug 230071

Summary:	[ MacOS wk1 ] media/video-preload.html is flaky failing
Product:	WebKit	Reporter:	ayumi_kojima
Component:	Media	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	eric.carlson, hi, peng.liu6, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Mac (Intel)
OS:	Unspecified

Description ayumi_kojima 2021-09-08 15:58:03 PDT

media/video-preload.html

Is a flaky failure on BigSur wk1 Release and Catalina wk1 Debug.

History: https://results.webkit.org/?suite=layout-tests&test=media%2Fvideo-preload.html

Result page: https://build.webkit.org/results/Apple-BigSur-Release-WK1-Tests/r279924%20(4049)/results.html

Diff: 

--- /Volumes/Data/worker/bigsur-release-tests-wk1/build/layout-test-results/media/video-preload-expected.txt
+++ /Volumes/Data/worker/bigsur-release-tests-wk1/build/layout-test-results/media/video-preload-actual.txt
@@ -5,9 +5,9 @@
 Will load with 'preload=none', should not buffer automatically until 'play()' is called
 RUN(video.setAttribute('preload', 'none'))
 RUN(video.removeAttribute('autoplay'))
-EVENT(loadstart)
 did not buffer automatically OK
 RUN(handlePromise(video.play()))
+EVENT(loadstart)
 EVENT(play)
 EVENT(loadedmetadata)
 buffered automatically OK

Comment 1 Radar WebKit Bug Importer 2021-09-08 15:58:34 PDT

<rdar://problem/82896239>

Comment 2 ayumi_kojima 2021-09-08 16:02:13 PDT

Marked test expectations: https://trac.webkit.org/changeset/282178/webkit

Comment 3 ayumi_kojima 2021-09-09 15:12:41 PDT

I was not able to reproduce the failure locally on BigSur using: run-webkit-tests --iterations 1000 --clobber-old-results --exit-after-n-failures 1 --force -1 media/video-preload.html -f

Comment 4 ayumi_kojima 2021-09-14 17:33:30 PDT

Tried on Catalina, but I was not able to reproduce the failure locally.