Bug 308265 – [GStreamer] Test media/media-source/media-source-reopen.html is a flaky failure

• Component: WPE WebKit
• Status: RESOLVED DUPLICATE

[Carlos Alberto Lopez Perez]

The test media/media-source/media-source-reopen.html fails randomly on WPE and GTK

The bot gtk-release completed 1055 runs on the interval [303869@main-307860@main]
Frequency of results for test: media/media-source/media-source-reopen.html
  1042 times [98.8%]     ->  NOERROR
  13 times [1.2%]        ->  TEXT PASS

Of those 1055 runs it didn't match the expectation 13 times [1.2%]
Details of the type and frequency of unmatched expectations:
  13 times [1.2%]        ->  TEXT PASS (Expected: PASS)

Flakiness factor: 2.5%
    - This test was flaky on 2.5% of the 1055 runs analyzed, either giving different
      results within a single run, or a different result than in the previous run.

The bot wpe-release completed 1256 runs on the interval [303869@main-307860@main]
Frequency of results for test: media/media-source/media-source-reopen.html
  1241 times [98.8%]     ->  NOERROR
  15 times [1.2%]        ->  TEXT PASS

Of those 1256 runs it didn't match the expectation 15 times [1.2%]
Details of the type and frequency of unmatched expectations:
  15 times [1.2%]        ->  TEXT PASS (Expected: PASS)

Flakiness factor: 2.3%
    - This test was flaky on 2.3% of the 1256 runs analyzed, either giving different
      results within a single run, or a different result than in the previous run.


This is the diff when it fails: 

--- /sdk/webkit/layout-test-results/media/media-source/media-source-reopen-expected.txt
+++ /sdk/webkit/layout-test-results/media/media-source/media-source-reopen-actual.txt
@@ -15,6 +15,7 @@
 EXPECTED (video.buffered.end(video.buffered.length-1) == Math.min(audiosb.buffered.end(audiosb.buffered.length-1), videosb.buffered.end(videosb.buffered.length-1)) == 'true') OK
 EVENT(update)
 RUN(source.endOfStream())
-EVENT(ended)
+EVENT(error)
+[object Event] FAIL
 END OF TEST
 


And it generates this stderr output:

0:00:06.395341962 1251419 0x7ff80c000e20 ERROR              videometa gstvideometa.c:424:default_map: plane 1, no memory at offset 309760
0:00:06.395355768 1251419 0x7ff80c000e20 ERROR                default video-frame.c:168:gst_video_frame_map_id: failed to map video frame plane 1
0:00:06.395436089 1251419 0x55a0dc0155e0 ERROR           webkitcommon GStreamerCommon.cpp:1073:operator():<mse-media-player-8> Got message: error message: 0x7ff5b42ff370, time 99:99:99.999999999, seq-num 9917, element 'avdec_h264-5', GstMessageError, gerror=(GError)NULL, debug=(string)"../../../../../jhbuild/checkout/gstreamer/subprojects/gst-libav/ext/libav/gstavviddec.c\(1888\):\ get_output_buffer\ \(\):\ /GstPlayBin3:mse-media-player-8/GstURIDecodeBin3:uridecodebin3/GstDecodebin3:decodebin3-8/avdec_h264:avdec_h264-5:\012The\ video\ memory\ allocated\ from\ downstream\ pool\ could\ not\ mapped\ for\ read\ and\ write.", details=(structure)"message-details\,\ stream-id\=\(string\)1\,\ uri\=\(string\)mediasourceblob:file:///61ebad0b-2eda-426a-8ac8-194dbb2f9071\;";
0:00:06.395450015 1251419 0x55a0dc0155e0 ERROR      webkitmediaplayer MediaPlayerPrivateGStreamer.cpp:2122:handleMessage:<mse-media-player-8> Cannot access memory for read and write operation. (url=mediasourceblob:file:///61ebad0b-2eda-426a-8ac8-194dbb2f9071) (code=7)


See run details: https://build.webkit.org/results/WPE-Linux-64-bit-Release-Tests/307804@main%20(25398)/results.html

[Philippe Normand]

*** This bug has been marked as a duplicate of bug 309438 ***