feat(logs): Add extra logging for 3015 errors (shaka-project#4932)

This adds extra context to 3015 (MEDIA_SOURCE_OPERATION_THREW) errors, by attaching the error on the media element. This is helpful because, in some situations, media source operations can have very unhelpful exception strings like: `Error: Failed to execute 'appendBuffer' on 'SourceBuffer': The HTMLMediaElement.error attribute is not null`
theodab · Jan 28, 2023 · 67a2451 · 67a2451
1 parent d465942
commit 67a2451
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Showing 3 changed files with 10 additions and 5 deletions.
diff --git a/lib/media/media_source_engine.js b/lib/media/media_source_engine.js
@@ -1265,7 +1265,8 @@ shaka.media.MediaSourceEngine = class {
           shaka.util.Error.Severity.CRITICAL,
           shaka.util.Error.Category.MEDIA,
           shaka.util.Error.Code.MEDIA_SOURCE_OPERATION_THREW,
-          exception);
+          exception,
+          this.video_.error || 'No error in the media element');
     } finally {
       // Unblock the queues.
       for (const contentType in this.sourceBuffers_) {
@@ -1308,7 +1309,8 @@ shaka.media.MediaSourceEngine = class {
               shaka.util.Error.Severity.CRITICAL,
               shaka.util.Error.Category.MEDIA,
               shaka.util.Error.Code.MEDIA_SOURCE_OPERATION_THREW,
-              exception));
+              exception,
+              this.video_.error || 'No error in the media element'));
         }
         this.popFromQueue_(contentType);
       }

diff --git a/lib/util/error.js b/lib/util/error.js
@@ -462,6 +462,7 @@ shaka.util.Error.Code = {
   /**
    * A MediaSource operation threw an exception.
    * <br> error.data[0] is the exception that was thrown.
+   * <br> error.data[1] is the error object from the video element.
    */
   'MEDIA_SOURCE_OPERATION_THREW': 3015,
 

diff --git a/test/media/media_source_engine_unit.js b/test/media/media_source_engine_unit.js
@@ -374,12 +374,13 @@ describe('MediaSourceEngine', () => {
 
     it('rejects promise when operation throws', async () => {
       audioSourceBuffer.appendBuffer.and.throwError('fail!');
-      mockVideo.error = {code: 5};
+      mockVideo.error = {code: 5, message: 'something failed'};
       const expected = Util.jasmineError(new shaka.util.Error(
           shaka.util.Error.Severity.CRITICAL,
           shaka.util.Error.Category.MEDIA,
           shaka.util.Error.Code.MEDIA_SOURCE_OPERATION_THREW,
-          jasmine.objectContaining({message: 'fail!'})));
+          jasmine.objectContaining({message: 'fail!'}),
+          {code: 5, message: 'something failed'}));
       await expectAsync(
           mediaSourceEngine.appendBuffer(
               ContentType.AUDIO, buffer, null,
@@ -712,7 +713,8 @@ describe('MediaSourceEngine', () => {
           shaka.util.Error.Severity.CRITICAL,
           shaka.util.Error.Category.MEDIA,
           shaka.util.Error.Code.MEDIA_SOURCE_OPERATION_THREW,
-          jasmine.objectContaining({message: 'fail!'})));
+          jasmine.objectContaining({message: 'fail!'}),
+          {code: 5}));
       await expectAsync(mediaSourceEngine.remove(ContentType.AUDIO, 1, 5))
           .toBeRejectedWith(expected);
       expect(audioSourceBuffer.remove).toHaveBeenCalledWith(1, 5);