309438 2026-03-07 23:52:36 -0800 [GStreamer] Flaky media test failures due to video frame map failures in avviddec with buffers allocated by the GL buffer pool 2026-04-19 03:59:34 -0700 1 1 1 Unclassified WebKit Media WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 csaavedra philn aboya calvaris clopez dpino eocanha fujii philn vitaly vwatermeier webkit-bug-importer zimmermann oldest_to_newest 2188155 0 csaavedra 2026-03-07 23:52:36 -0800 https://results.webkit.org/?suite=layout-tests&test=media%2Fremote-control-command-scrubbing.html&platform=GTK&platform=WPE https://build.webkit.org/results/GTK-Linux-64-bit-Release-Tests/308879@main%20(23819)/results.html 0:00:08.781789309 650221 0x7f0900001120 ERROR videometa gstvideometa.c:424:default_map: plane 1, no memory at offset 99840 0:00:08.781802564 650221 0x7f0900001120 ERROR default video-frame.c:168:gst_video_frame_map_id: failed to map video frame plane 1 0:00:08.785723698 650221 0x557320cd5760 ERROR webkitcommon GStreamerCommon.cpp:1087:operator():<regular-media-player-8> Got message: error message: 0x7f06a0027ba0, time 99:99:99.999999999, seq-num 6880, element 'avdec_h264-6', GstMessageError, gerror=(GError)NULL, debug=(string)"../../../../../jhbuild/checkout/gstreamer/subprojects/gst-libav/ext/libav/gstavviddec.c\(1888\):\ get_output_buffer\ \(\):\ /GstPlayBin:regular-media-player-8/GstURIDecodeBin:uridecodebin8/GstDecodeBin:decodebin8/avdec_h264:avdec_h264-6:\012The\ video\ memory\ allocated\ from\ downstream\ pool\ could\ not\ mapped\ for\ read\ and\ write."; 0:00:08.785742483 650221 0x557320cd5760 ERROR webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:2132:handleMessage:<regular-media-player-8> Cannot access memory for read and write operation. (url=file:///sdk/webkit/LayoutTests/media/content/test.mp4) (code=7) 2193131 1 philn 2026-03-24 07:00:40 -0700 *** Bug 224105 has been marked as a duplicate of this bug. *** 2193133 2 philn 2026-03-24 07:00:45 -0700 *** Bug 309436 has been marked as a duplicate of this bug. *** 2193135 3 philn 2026-03-24 07:02:19 -0700 *** Bug 308265 has been marked as a duplicate of this bug. *** 2194334 4 philn 2026-03-27 08:33:36 -0700 I wonder if this is related with bug 310895 ... 2195118 5 philn 2026-03-30 05:00:21 -0700 *** Bug 311093 has been marked as a duplicate of this bug. *** 2195829 6 philn 2026-04-01 01:41:48 -0700 results link: https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=media%2Fvideo-src-blob-replay.html&test=media%2Fmedia-source%2Fmedia-source-reopen.html&test=media%2Fvideo-load-preload-metadata.html&test=compositing%2Fvideo%2Fvideo-clip-change-src.html&test=media%2Fremote-control-command-scrubbing.html&platform=GTK&platform=WPE 2196163 7 csaavedra 2026-04-01 22:45:17 -0700 *** Bug 311320 has been marked as a duplicate of this bug. *** 2199123 8 dpino 2026-04-11 00:32:28 -0700 Several tests failing with this error were filed under bug webkit.org/b/308438. These other tests are also flaky timeout (>0.5%), failing with a similar stderr: ``` media/media-controller-timeupdate.html media/media-source/media-source-webm-configuration-framerate.html media/modern-media-controls/media-controller/media-controller-click-on-video-controls-should-not-pause.html media/playlist-inherits-user-gesture.html media/remote-control-command-seek.html media/remove-from-document-with-text-track.html media/track/track-cue-missing.html media/track/track-long-captions-file.html media/track/webvtt-inline.html media/video-currentTime-duration.html media/video-isplayingtoautomotiveheadunit.html media/video-main-content-allow-then-scroll.html media/video-main-content-deny-display-none.html media/video-main-content-deny-too-small.html media/video-paused-0-rate.html media/video-pause-empty-events.html media/video-replaces-poster.html media/video-seek-by-small-increment.html media/video-seeking.html media/video-unmuted-after-play-holds-sleep-assertion.html ``` For instance, test in the case of 'media/media-controller-timeupdate.html': https://results.webkit.org/?suite=layout-tests&test=media%2Fmedia-controller-timeupdate.html&platform=GTK&platform=WPE stderr: ``` 0:00:08.642527865 607321 0xffff480012f0 ERROR videometa gstvideometa.c:424:default_map: plane 1, no memory at offset 83200 0:00:08.642545225 607321 0xffff480012f0 ERROR default video-frame.c:168:gst_video_frame_map_id: failed to map video frame plane 1 0:00:08.643018868 607321 0xaaaaf3a2d3b0 ERROR webkitcommon GStreamerCommon.cpp:1086:operator():<regular-video-16> Got message: error message: 0xfffc740391b0, time 99:99:99.999999999, seq-num 13323, element 'avdec_h264-12', GstMessageError, gerror=(GError)NULL, debug=(string)"../../../../../jhbuild/checkout/gstreamer/subprojects/gst-libav/ext/libav/gstavviddec.c\(1888\):\ get_output_buffer\ \(\):\ /GstPlayBin:regular-video-16/GstURIDecodeBin:uridecodebin16/GstDecodeBin:decodebin16/avdec_h264:avdec_h264-12:\012The\ video\ memory\ allocated\ from\ downstream\ pool\ could\ not\ mapped\ for\ read\ and\ write."; 0:00:08.643040109 607321 0xaaaaf3a2d3b0 ERROR webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:2139:handleMessage:<regular-video-16> Cannot access memory for read and write operation. (url=file:///sdk/webkit/LayoutTests/media/content/test.mp4) (code=7) ``` 2199192 9 philn 2026-04-11 07:52:43 -0700 How much RAM do we have on these bots? Is the post-commit bot fleet using a uniform set of machines? (same amount of CPU vCores and RAM)? 2199424 10 philn 2026-04-12 05:46:46 -0700 I was able to reproduce this in wksdk only, I'm not sure what's going on, the decoder sometimes fails to map buffers allocated by the GL pool... Maybe some issue in Mesa... Anyway, this won't be an issue anymore when we update to GStreamer 1.28 where glupload uses another allocator (udmabuf). 2199437 11 philn 2026-04-12 07:33:03 -0700 *** Bug 307294 has been marked as a duplicate of this bug. *** 2199439 12 philn 2026-04-12 07:37:12 -0700 *** Bug 306471 has been marked as a duplicate of this bug. *** 2199440 13 philn 2026-04-12 07:38:29 -0700 media/video-buffered.html [ Pass Failure Timeout ] should become media/video-buffered.html [ Pass Failure ] after fixing this... 2199453 14 philn 2026-04-12 08:26:36 -0700 *** Bug 311863 has been marked as a duplicate of this bug. *** 2199459 15 philn 2026-04-12 08:33:11 -0700 *** Bug 308146 has been marked as a duplicate of this bug. *** 2199462 16 philn 2026-04-12 08:34:57 -0700 *** Bug 307666 has been marked as a duplicate of this bug. *** 2199464 17 philn 2026-04-12 08:37:40 -0700 webkit.org/b/122508 compositing/video/video-reflection.html [ Pass Timeout ] should be removed after fixing this. 2199466 18 philn 2026-04-12 08:58:52 -0700 *** Bug 310278 has been marked as a duplicate of this bug. *** 2199468 19 philn 2026-04-12 08:59:55 -0700 *** Bug 310274 has been marked as a duplicate of this bug. *** 2199469 20 philn 2026-04-12 09:04:01 -0700 webkit.org/b/169918 compositing/video/video-object-position.html [ Failure Timeout ] should become webkit.org/b/169918 compositing/video/video-object-position.html [ Failure ] after fixing this. 2199470 21 philn 2026-04-12 09:06:37 -0700 webkit.org/b/264680 media/video-page-visibility-restriction.html [ Pass Timeout ] should be removed after fixing this. 2199471 22 philn 2026-04-12 09:08:02 -0700 webkit.org/b/262949 media/media-garbage-collection.html [ Pass Timeout Failure ] should become webkit.org/b/262949 media/media-garbage-collection.html [ Pass Failure ] after fixing this. 2199472 23 philn 2026-04-12 09:09:55 -0700 webkit.org/b/261024 media/video-playsinline.html [ Failure Timeout Pass ] also affected by this issue. 2199473 24 philn 2026-04-12 09:26:46 -0700 Before opening new bugs about flaky timeout media tests please check if there is a -stderr.txt file for the test in the results folder, containing the error mentioned above... 2199715 25 dpino 2026-04-13 06:28:01 -0700 *** Bug 311860 has been marked as a duplicate of this bug. *** 2199717 26 dpino 2026-04-13 06:29:07 -0700 *** Bug 311862 has been marked as a duplicate of this bug. *** 2201946 27 philn 2026-04-19 01:51:38 -0700 *** Bug 310746 has been marked as a duplicate of this bug. *** 2201948 28 philn 2026-04-19 01:53:02 -0700 *** Bug 310747 has been marked as a duplicate of this bug. *** 2201950 29 philn 2026-04-19 01:55:05 -0700 *** Bug 310745 has been marked as a duplicate of this bug. *** 2201953 30 philn 2026-04-19 02:14:05 -0700 *** Bug 310755 has been marked as a duplicate of this bug. *** 2201955 31 philn 2026-04-19 02:15:33 -0700 *** Bug 310756 has been marked as a duplicate of this bug. *** 2201957 32 philn 2026-04-19 02:17:18 -0700 *** Bug 310757 has been marked as a duplicate of this bug. *** 2201958 33 philn 2026-04-19 02:32:41 -0700 Updated results link, manually checked the tests that are consistently passing since ~ Apr 13. https://results.webkit.org/?platform=GTK&platform=WPE&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=media%2Fvideo-interruption-with-resume-not-allowing-play.html&test=media%2Fmodern-media-controls%2Ftime-label%2Ftime-label-white-space-nowrap.html&test=media%2Fvideo-seekable.html&test=media%2Fvideo-seek-double.html&test=media%2Fvideo-src-blob-replay.html&test=media%2Fvideo-pause-play-resolve.html&test=media%2Fmedia-controller-time.html&test=media%2Fvideo-size.html&test=media%2Fmodern-media-controls%2Fstatus-support%2Fstatus-support-playing.html&test=media%2Fvideo-seek-past-end-paused.html&test=media%2Fvideo-playbackrate.html&test=media%2Fvideo-pause-immediately.html&test=media%2Fvideo-poster-not-found.html&test=media%2Fvideo-webkit-playsinline.html&test=media%2Fvideo-seek-pause.html&test=media%2Fvideo-seeking.html&test=media%2Fvideo-seek-by-small-increment.html&test=media%2Fvideo-replaces-poster.html&test=media%2Fvideo-pause-empty-events.html&test=media%2Fvideo-paused-0-rate.html&test=media%2Fvideo-main-content-deny-too-small.html&test=media%2Fvideo-main-content-deny-display-none.html&test=media%2Fvideo-main-content-autoplay.html&test=media%2Fvideo-main-content-allow-then-scroll.html&test=media%2Fvideo-load-preload-metadata.html&test=media%2Fvideo-isplayingtoautomotiveheadunit.html&test=media%2Fvideo-currentTime-set2.html&test=media%2Fvideo-currenttime-monotonic.html&test=media%2Fvideo-currentTime-duration.html&test=media%2Fvideo-main-content-allow-then-scroll.html&test=media%2Fvideo-currentTime-set.html&test=media%2Fmodern-media-controls%2Ftime-labels-support%2Fremaining-time.html&test=media%2Fvideo-concurrent-playback.html&test=media%2Ftrack%2Fwebvtt-inline.html&test=media%2Ftrack%2Ftrack-long-captions-file.html&test=media%2Ftrack%2Ftrack-cue-missing.html&test=media%2Fremove-from-document-with-text-track.html&test=media%2Fremote-control-command-seek.html&test=media%2Fremote-control-command-scrubbing.html&test=media%2Fplaylist-inherits-user-gesture.html&test=media%2Fmodern-media-controls%2Ftracks-support%2Fno-tracks.html&test=media%2Fmodern-media-controls%2Fmedia-controller%2Fmedia-controller-click-on-video-controls-should-not-pause.html&test=media%2Fmodern-media-controls%2Fmedia-controller%2Fmedia-controller-auto-hide-mouse-leave-after-play.html&test=media%2Fmedia-source%2Fmedia-source-webm-configuration-framerate.html&test=media%2Fmedia-source%2Fmedia-source-reopen.html&test=media%2Fmedia-controller-timeupdate.html&test=compositing%2Fvideo%2Fvideo-clip-change-src.html 2201961 34 philn 2026-04-19 02:45:19 -0700 Pull request: https://github.com/WebKit/WebKit/pull/63065 2201962 35 ews-feeder 2026-04-19 02:47:30 -0700 Committed 311541@main (ea60ea79a3be): <https://commits.webkit.org/311541@main> Reviewed commits have been landed. Closing PR #63065 and removing active labels. 2201963 36 webkit-bug-importer 2026-04-19 02:48:14 -0700 <rdar://problem/175106549> 2201974 37 philn 2026-04-19 03:58:03 -0700 *** Bug 254520 has been marked as a duplicate of this bug. *** 2201976 38 philn 2026-04-19 03:59:34 -0700 *** Bug 307144 has been marked as a duplicate of this bug. ***