Bug 207978

Summary:	[ Mac ] imported/w3c/web-platform-tests/service-workers/service-worker/resource-timing.sub.https.html is flaky failing.
Product:	WebKit	Reporter:	Jason Lawrence <Lawrence.j>
Component:	Platform	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Mac
OS:	macOS 10.15

Description Jason Lawrence 2020-02-19 17:23:03 PST

imported/w3c/web-platform-tests/service-workers/service-worker/resource-timing.sub.https.html

Description:
This test is flaky failing on Mac throughout the visible history. The oldest diff that I am able to load is r254348, it matches exactly.

History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fservice-workers%2Fservice-worker%2Fresource-timing.sub.https.html&limit=50000&platform=mac&style=release&style=debug

Diff:
--- /Volumes/Data/slave/catalina-debug-tests-wk2-gpuprocess/build/layout-test-results/imported/w3c/web-platform-tests/service-workers/service-worker/resource-timing.sub.https-expected.txt
+++ /Volumes/Data/slave/catalina-debug-tests-wk2-gpuprocess/build/layout-test-results/imported/w3c/web-platform-tests/service-workers/service-worker/resource-timing.sub.https-actual.txt
@@ -1,5 +1,5 @@
 
 
-FAIL Controlled resource loads assert_greater_than: Generated response expected a number greater than 0 but got 0
+FAIL Controlled resource loads assert_equals: Generated response expected 1 but got 2
 PASS Non-controlled resource loads

Comment 1 Radar WebKit Bug Importer 2020-02-19 17:23:29 PST

<rdar://problem/59613082>

Comment 2 Jason Lawrence 2020-02-19 17:24:49 PST

I am able to reproduce this issue locally with r256933 using the command below.
run-webkit-tests imported/w3c/web-platform-tests/service-workers/service-worker/resource-timing.sub.https.html --iterations 4000 --exit-after-n-failures 5 -f --force -g

[17/4000] imported/w3c/web-platform-tests/service-workers/service-worker/resource-timing.sub.https.html failed unexpectedly (text diff)
[118/4000] imported/w3c/web-platform-tests/service-workers/service-worker/resource-timing.sub.https.html failed unexpectedly (text diff)
[212/4000] imported/w3c/web-platform-tests/service-workers/service-worker/resource-timing.sub.https.html failed unexpectedly (text diff)
[531/4000] imported/w3c/web-platform-tests/service-workers/service-worker/resource-timing.sub.https.html failed unexpectedly (text diff)
[612/4000] imported/w3c/web-platform-tests/service-workers/service-worker/resource-timing.sub.https.html failed unexpectedly (text diff)
Exiting early after 5 failures. 609 tests run.


604 tests ran as expected, 5 didn't (3391 didn't run):

Comment 3 Jason Lawrence 2020-02-19 17:28:28 PST

I have marked this test as failing while this issue is investigated.
https://trac.webkit.org/changeset/257012/webkit