Test is a flaky failure: http/tests/xmlhttprequest/access-control-basic-non-simple-deny-cached.html History: https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Ftests%2Fxmlhttprequest%2Faccess-control-basic-non-simple-deny-cached.html Test results from most recent failure: https://build.webkit.org/results/Apple%20iOS%2010%20Simulator%20Release%20WK2%20(Tests)/r215404%20(706)/results.html diff: --- /Volumes/Data/slave/ios-simulator-10-release-tests-wk2/build/layout-test-results/http/tests/xmlhttprequest/access-control-basic-non-simple-deny-cached-expected.txt +++ /Volumes/Data/slave/ios-simulator-10-release-tests-wk2/build/layout-test-results/http/tests/xmlhttprequest/access-control-basic-non-simple-deny-cached-actual.txt @@ -1,3 +1,2 @@ -CONSOLE MESSAGE: line 42: XMLHttpRequest cannot load http://localhost:8000/xmlhttprequest/resources/access-control-basic-non-get-allow.cgi. Request header field Content-Type is not allowed by Access-Control-Allow-Headers. -PASS: Exception thrown. Cross-domain access is not allowed in 'send'. [ A network error occurred.]. +PASS: Exception thrown. Cross-domain access is not allowed in 'send'. [The operation timed out.]. First failure in history 4/16/2017 7:09:16 PM At Revision r215404
In Apache access logs, I see three requests for the subresource. 127.0.0.1 - - [26/Apr/2017:15:54:49 -0700] "GET /xmlhttprequest/access-control-basic-non-simple-deny-cached.html HTTP/1.1" 200 1571 325 ::1 - - [26/Apr/2017:15:54:49 -0700] "OPTIONS /xmlhttprequest/resources/access-control-basic-non-get-allow.cgi HTTP/1.1" 200 - 7782458 ::1 - - [26/Apr/2017:15:54:57 -0700] "PUT /xmlhttprequest/resources/access-control-basic-non-get-allow.cgi HTTP/1.1" 200 58 3070087 ::1 - - [26/Apr/2017:15:55:00 -0700] "OPTIONS /xmlhttprequest/resources/access-control-basic-non-get-allow.cgi HTTP/1.1" 200 - 10750080 Relevant run-webkit-tests logs: 15:54:49.643 28083 worker/7 http/tests/xmlhttprequest/access-control-basic-non-simple-allow.html passed ... 15:55:17.337 28083 "ruby -I /Volumes/Data/slave/ios-simulator-10-release-tests-wk2/build/Websites/bugs.webkit.org/PrettyPatch /Volumes/Data/slave/ios-simulator-10-release-tests-wk2/build/Websites/bugs.webkit.org/PrettyPatch/prettify.rb /Volumes/Data/slave/ios-simulator-10-release-tests-wk2/build/layout-test-results/http/tests/xmlhttprequest/access-control-basic-non-simple-deny-cached-diff.txt" took 6.74s 15:55:17.352 26617 [22527/41658] http/tests/xmlhttprequest/access-control-basic-non-simple-deny-cached.html failed unexpectedly (text diff) 15:55:17.338 28083 worker/7 http/tests/xmlhttprequest/access-control-basic-non-simple-deny-cached.html failed: 15:55:17.338 28083 worker/7 text diff
What's surprising here is that sync XHR shouldn't be timing out, at least not so quickly.