[webkit-dev] Flaky test hit list

[Adam Barth]

https://bugs.webkit.org/show_bug.cgi?id=46956

Unfortunately, it doesn't solve the whole problem.  It does seem to
reduce the flakiness by a lot though.

Adam


On Thu, Sep 30, 2010 at 6:12 PM, Adam Barth <abarth at webkit.org> wrote:
> Currently the WebSocket tests are served over HTTP from the WebSocket
> server itself (which is written in Python).  It looks like we can
> resolve the flakiness by serving the WebSocket tests from the normal
> Apache server that servers the rest of our HTTP tests.  I'm going to
> work up a patch that does that.  Please let me know if there's any
> reason we shouldn't make that change.
>
> Thanks,
> Adam
>
>
> On Thu, Sep 30, 2010 at 3:10 PM, Adam Barth <abarth at webkit.org> wrote:
>> I'm investigating the websocket issue.  It seems these tests are flaky
>> because they time out.  If you know about websockets, I'd appreciate
>> any tips you have via #webkit.
>>
>> Adam
>>
>>
>> On Wed, Sep 29, 2010 at 11:31 PM, Adam Barth <abarth at webkit.org> wrote:
>>> Tonight I wrote a new webkit-patch command for detecting flaky tests.
>>> Here the tests that have flaked out on the Snow Leopard (Tests) build
>>> bot during the last 2000 revisions.  This makes a good "hit list" of
>>> tests to fix to reduce flakiness.  (The worst offenders are at the
>>> bottom).
>>>
>>> Take aways:
>>>
>>> 1) compositing/geometry/limit-layer-bounds-transformed-overflow.html
>>> is by far the worst offender.
>>> 2) The websocket tests are ridiculously flaky.
>>> 3) The appcache tests also have a serious flakiness problem.
>>>
>>> I'll run the last 10000 revisions over night and report on the results.
>>>
>>> Adam
>>>
>>>
>>> === Results ===
>>> Occurances Test name
>>>         1 compositing/reflections/nested-reflection-animated.html
>>>         1 fast/css/font-face-download-error.html
>>>         1 fast/dom/collection-null-like-arguments.html
>>>         1 fast/history/history-subframe-with-name.html
>>>         1 fast/js/sputnik/Conformance/13_Function_Definition/13.2_Creating_Function_Objects/S13.2.2_A5_T1.html
>>>         1 fast/js/sputnik/Conformance/13_Function_Definition/13.2_Creating_Function_Objects/S13.2.2_A5_T2.html
>>>         1 fast/js/vardecl-preserve-arguments.html
>>>         1 http/tests/appcache/different-https-origin-resource-main.html
>>>         1 http/tests/appcache/fallback.html
>>>         1 http/tests/appcache/manifest-redirect.html
>>>         1 http/tests/appcache/origin-quota.html
>>>         1 http/tests/appcache/resource-redirect.html
>>>         1 http/tests/appcache/top-frame-3.html
>>>         1 http/tests/appcache/update-cache.html
>>>         1 http/tests/appcache/xhr-foreign-resource.html
>>>         1 http/tests/cache/subresource-expiration.html
>>>         1 http/tests/loading/basic-credentials-sent-automatically.html
>>>         1 http/tests/misc/uncacheable-script-repeated.html
>>>         1 http/tests/navigation/changing-frame-hierarchy-in-onload.html
>>>         1 http/tests/navigation/ping-cross-origin-from-https.html
>>>         1 http/tests/navigation/ping-cross-origin.html
>>>         1 http/tests/navigation/post-goback-same-url.html
>>>         1 http/tests/plugins/get-url.html
>>>         1 http/tests/plugins/npapi-response-headers.html
>>>         1 http/tests/plugins/third-party-cookie-accept-policy.html
>>>         1 http/tests/security/credentials-in-referer.html
>>>         1 http/tests/security/cross-frame-access-protocol-explicit-domain.html
>>>         1 inspector/debugger-pause-on-breakpoint.html
>>>         1 inspector/extensions-events.html
>>>         1 media/audio-constructor.html
>>>         1 media/video-currentTime-set.html
>>>         1 plugins/destroy-stream-twice.html
>>>         1 plugins/return-error-from-new-stream-doesnt-invoke-destroy-stream.html
>>>         1 svg/custom/use-invalid-style.svg
>>>         1 transitions/transition-end-event-transform.html
>>>         1 websocket/tests/send.html
>>>         1 websocket/tests/simple-stress.html
>>>         1 websocket/tests/sub-protocol-with-space.html
>>>         1 websocket/tests/url-no-trailing-slash.html
>>>         1 websocket/tests/url-with-empty-query.html
>>>         1 websocket/tests/url-with-query.html
>>>         1 websocket/tests/websocket-pending-activity.html
>>>         1 websocket/tests/workers/close-in-onmessage-crash.html
>>>         2 http/tests/appcache/foreign-iframe-main.html
>>>         2 http/tests/appcache/local-content.html
>>>         2 http/tests/appcache/main-resource-hash.html
>>>         2 http/tests/appcache/non-html.xhtml
>>>         2 http/tests/appcache/reload.html
>>>         2 http/tests/css/css-image-loading.html
>>>         2 http/tests/plugins/cross-frame-object-access.html
>>>         2 http/tests/security/cross-frame-access-port-explicit-domain.html
>>>         2 security/block-test.html
>>>         2 websocket/tests/bad-sub-protocol-non-ascii.html
>>>         2 websocket/tests/handshake-fail-by-sub-protocol-mismatch.html
>>>         2 websocket/tests/simple.html
>>>         2 websocket/tests/unicode.html
>>>         3 http/tests/appcache/cyrillic-uri.html
>>>         3 http/tests/appcache/deferred-events-delete-while-raising.html
>>>         3 http/tests/appcache/remove-cache.html
>>>         3 http/tests/appcache/top-frame-4.html
>>>         3 http/tests/navigation/image-load-in-unload-handler.html
>>>         3 websocket/tests/handshake-fail-by-cross-origin.html
>>>         3 websocket/tests/httponly-cookie.pl
>>>         3 websocket/tests/long-invalid-header.html
>>>         3 websocket/tests/sub-protocol.html
>>>         3 websocket/tests/url-with-query-for-no-query.html
>>>         4 fast/canvas/webgl/gl-object-get-calls.html
>>>         4 http/tests/navigation/anchor-basic.html
>>>         4 websocket/tests/bad-sub-protocol-control-chars.html
>>>         4 websocket/tests/frame-length-longer-than-buffer.html
>>>         4 websocket/tests/frame-length-skip.html
>>>         4 websocket/tests/frame-lengths.html
>>>         4 websocket/tests/reload-crash.html
>>>         4 websocket/tests/url-with-credential.html
>>>         5 websocket/tests/bad-sub-protocol-empty.html
>>>         5 websocket/tests/error-detect.html
>>>         5 websocket/tests/handshake-error.html
>>>         6 websocket/tests/handshake-challenge-randomness.html
>>>         6 websocket/tests/null-character.html
>>>         7 http/tests/security/cross-origin-css.html
>>>         7 websocket/tests/bufferedAmount-after-close.html
>>>         7 websocket/tests/close-on-unload.html
>>>         7 websocket/tests/frame-length-overflow.html
>>>         7 websocket/tests/handshake-fail-by-no-cr.html
>>>         8 websocket/tests/multiple-connections.html
>>>         9 websocket/tests/alert-in-event-handler.html
>>>         9 websocket/tests/close-on-unload-and-force-gc.html
>>>        10 websocket/tests/bad-handshake-crash.html
>>>        11 websocket/tests/cross-origin.html
>>>        12 http/tests/navigation/ping-same-origin.html
>>>        13 websocket/tests/close-on-unload-reference-in-parent.html
>>>        15 websocket/tests/close-on-navigate-new-location.html
>>>        19 media/audio-controls-rendering.html
>>>        50 compositing/geometry/limit-layer-bounds-transformed-overflow.html
>>>
>>
>