Bug 187857

Summary:	[ MacOS ] Layout Test imported/w3c/web-platform-tests/notifications/event-onshow.html is flaky
Product:	WebKit	Reporter:	Truitt Savell <tsavell>
Component:	Tools / Tests	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	lforschler, realdawei, ryanhaddad
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Truitt Savell 2018-07-20 08:53:32 PDT

The following layout test is flaky on MacOS

imported/w3c/web-platform-tests/notifications/event-onshow.html

Probable cause:

The failure is Highly intermittent. Happening maybe every 20 to 50 runs. Test is timing out from the test harness. If the test doesn't finish immediately it will timeout in around 27-30 seconds. I have not reproduced issue yet. 

--- /Volumes/Data/slave/highsierra-release-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/notifications/event-onshow-expected.txt
+++ /Volumes/Data/slave/highsierra-release-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/notifications/event-onshow-actual.txt
@@ -1,4 +1,6 @@
+
+Harness Error (TIMEOUT), message = null
 
 PASS Checked test prerequisites. 
-PASS Invoked the onshow event handler. 
+NOTRUN Invoked the onshow event handler. 
 

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fw3c%2Fweb-platform-tests%2Fnotifications%2Fevent-onshow.html