Komga fails to generate thumbnails for certain EPUB files

[zhen-huan-hu]

Steps to reproduce

Add certain EPUB files and have Komga scan/analyze the file

Expected behavior

Komga generates the thumbnail of the file

Actual behavior

Thumbnail not generated.

Logs

2025-01-21T00:26:15.305-06:00  INFO 1 --- [http-nio-25600-exec-20] o.g.komga.application.tasks.TaskEmitter  : Sending task: AnalyzeBook(bookId='0JJJ0J7CPQYYK', priority='6')
2025-01-21T00:26:15.329-06:00 DEBUG 1 --- [task-4] o.g.k.application.tasks.TaskProcessor    : Active count: 0, Core Pool Size: 1, Pool Size: 1
2025-01-21T00:26:15.329-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Try to process first available task
2025-01-21T00:26:15.338-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Found task to process: AnalyzeBook(bookId='0JJJ0J7CPQYYK', priority='6')
2025-01-21T00:26:15.338-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskHandler  : Executing task: AnalyzeBook(bookId='0JJJ0J7CPQYYK', priority='6')
2025-01-21T00:26:15.344-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.domain.service.BookLifecycle   : Analyze and persist book: Book(name=An American Marriage (Oprah's B - Tayari Jones, url=file:/media/Neptune/Books/Fictions/An%20American%20Marriage%20(Oprah's%20B%20-%20Tayari%20Jones.epub, fileLastModified=2025-01-20T00:49:45.462, fileSize=3244898, fileHash=406ad6569222f0e6fcef579ed74a46a6, fileHashKoreader=, number=6, id=0JJJ0J7CPQYYK, seriesId=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC, deletedDate=null, oneshot=false, createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-20T23:57:50.537)
2025-01-21T00:26:15.348-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.domain.service.BookAnalyzer    : Trying to analyze book: Book(name=An American Marriage (Oprah's B - Tayari Jones, url=file:/media/Neptune/Books/Fictions/An%20American%20Marriage%20(Oprah's%20B%20-%20Tayari%20Jones.epub, fileLastModified=2025-01-20T00:49:45.462, fileSize=3244898, fileHash=406ad6569222f0e6fcef579ed74a46a6, fileHashKoreader=, number=6, id=0JJJ0J7CPQYYK, seriesId=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC, deletedDate=null, oneshot=false, createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-20T23:57:50.537)
2025-01-21T00:26:15.383-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.domain.service.BookAnalyzer    : Detected media type: application/epub+zip
2025-01-21T00:26:15.546-06:00 DEBUG 1 --- [scheduling-1] o.g.komga.interfaces.sse.SseController   : Publish SSE: 'TaskQueueStatus':TaskQueueSseDto(count=1, countByType={AnalyzeBook=1})
2025-01-21T00:26:15.649-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.i.kobo.KepubConverter              : Starting conversion with: /usr/bin/kepubify /media/Neptune/Books/Fictions/An American Marriage (Oprah's B - Tayari Jones.epub -o /tmp/An American Marriage (Oprah's B - Tayari Jones.kepub.epub
2025-01-21T00:26:15.744-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.i.kobo.KepubConverter              : kepubify output: Kepubify v4.0.4

[  1/  1] Converting /media/Neptune/Books/Fictions/An American Marriage (Oprah's B - Tayari Jones.epub

1 total: 1 converted, 0 copied, 0 skipped, 0 errored
2025-01-21T00:26:16.120-06:00  INFO 1 --- [taskProcessor-1] o.g.k.i.m.epub.EpubExtractor             : Epub Divina detection failed: book is not fixed layout
2025-01-21T00:26:16.212-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskEmitter  : Sending task: GenerateBookThumbnail(bookId='0JJJ0J7CPQYYK', priority='7')
2025-01-21T00:26:16.217-06:00 DEBUG 1 --- [task-1] o.g.komga.interfaces.sse.SseController   : Publish SSE: 'BookChanged':BookSseDto(bookId=0JJJ0J7CPQYYK, seriesId=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC)
2025-01-21T00:26:16.232-06:00 DEBUG 1 --- [task-7] o.g.k.application.tasks.TaskProcessor    : Active count: 1, Core Pool Size: 1, Pool Size: 1
2025-01-21T00:26:16.233-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskEmitter  : Sending task: RefreshBookMetadata(bookId='0JJJ0J7CPQYYK', capabilities=[TITLE, SUMMARY, NUMBER, NUMBER_SORT, RELEASE_DATE, AUTHORS, TAGS, ISBN, READ_LISTS, THUMBNAILS, LINKS], priority='7')
2025-01-21T00:26:16.254-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskHandler  : Task AnalyzeBook(bookId='0JJJ0J7CPQYYK', priority='6') executed in 916.241566ms
2025-01-21T00:26:16.255-06:00 DEBUG 1 --- [task-3] o.g.k.application.tasks.TaskProcessor    : Active count: 1, Core Pool Size: 1, Pool Size: 1
2025-01-21T00:26:16.255-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Task processed, remove it from the queue: AnalyzeBook(bookId='0JJJ0J7CPQYYK', priority='6')
2025-01-21T00:26:16.261-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Active count: 1, Core Pool Size: 1, Pool Size: 1
2025-01-21T00:26:16.261-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Try to process first available task
2025-01-21T00:26:16.322-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Found task to process: GenerateBookThumbnail(bookId='0JJJ0J7CPQYYK', priority='7')
2025-01-21T00:26:16.322-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskHandler  : Executing task: GenerateBookThumbnail(bookId='0JJJ0J7CPQYYK', priority='7')
2025-01-21T00:26:16.324-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.domain.service.BookLifecycle   : Generate thumbnail and persist for book: Book(name=An American Marriage (Oprah's B - Tayari Jones, url=file:/media/Neptune/Books/Fictions/An%20American%20Marriage%20(Oprah's%20B%20-%20Tayari%20Jones.epub, fileLastModified=2025-01-20T00:49:45.462, fileSize=3244898, fileHash=406ad6569222f0e6fcef579ed74a46a6, fileHashKoreader=, number=6, id=0JJJ0J7CPQYYK, seriesId=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC, deletedDate=null, oneshot=false, createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-20T23:57:50.537)
2025-01-21T00:26:16.327-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.domain.service.BookAnalyzer    : Generate thumbnail for book: BookWithMedia(book=Book(name=An American Marriage (Oprah's B - Tayari Jones, url=file:/media/Neptune/Books/Fictions/An%20American%20Marriage%20(Oprah's%20B%20-%20Tayari%20Jones.epub, fileLastModified=2025-01-20T00:49:45.462, fileSize=3244898, fileHash=406ad6569222f0e6fcef579ed74a46a6, fileHashKoreader=, number=6, id=0JJJ0J7CPQYYK, seriesId=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC, deletedDate=null, oneshot=false, createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-20T23:57:50.537), media=Media(status=READY, mediaType=application/epub+zip, comment=null, bookId='0JJJ0J7CPQYYK', createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-21T00:26:16.191))
2025-01-21T00:26:16.349-06:00 ERROR 1 --- [taskProcessor-1] o.g.komga.domain.service.BookLifecycle   : Error while creating thumbnail
2025-01-21T00:26:16.352-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskHandler  : Task GenerateBookThumbnail(bookId='0JJJ0J7CPQYYK', priority='7') executed in 29.854919ms
2025-01-21T00:26:16.354-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Task processed, remove it from the queue: GenerateBookThumbnail(bookId='0JJJ0J7CPQYYK', priority='7')
2025-01-21T00:26:16.362-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Active count: 1, Core Pool Size: 1, Pool Size: 1
2025-01-21T00:26:16.362-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Try to process first available task
2025-01-21T00:26:16.382-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Found task to process: RefreshBookMetadata(bookId='0JJJ0J7CPQYYK', capabilities=[LINKS, NUMBER_SORT, RELEASE_DATE, ISBN, TAGS, READ_LISTS, THUMBNAILS, NUMBER, AUTHORS, TITLE, SUMMARY], priority='7')
2025-01-21T00:26:16.383-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskHandler  : Executing task: RefreshBookMetadata(bookId='0JJJ0J7CPQYYK', capabilities=[LINKS, NUMBER_SORT, RELEASE_DATE, ISBN, TAGS, READ_LISTS, THUMBNAILS, NUMBER, AUTHORS, TITLE, SUMMARY], priority='7')
2025-01-21T00:26:16.385-06:00  INFO 1 --- [taskProcessor-1] o.g.k.d.service.BookMetadataLifecycle    : Refresh metadata for book: Book(name=An American Marriage (Oprah's B - Tayari Jones, url=file:/media/Neptune/Books/Fictions/An%20American%20Marriage%20(Oprah's%20B%20-%20Tayari%20Jones.epub, fileLastModified=2025-01-20T00:49:45.462, fileSize=3244898, fileHash=406ad6569222f0e6fcef579ed74a46a6, fileHashKoreader=, number=6, id=0JJJ0J7CPQYYK, seriesId=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC, deletedDate=null, oneshot=false, createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-20T23:57:50.537) with capabilities: [LINKS, NUMBER_SORT, RELEASE_DATE, ISBN, TAGS, READ_LISTS, THUMBNAILS, NUMBER, AUTHORS, TITLE, SUMMARY]
2025-01-21T00:26:16.400-06:00  INFO 1 --- [taskProcessor-1] o.g.k.d.service.BookMetadataLifecycle    : Library is not set to import book or read lists metadata for this provider, skipping: IsbnBarcodeProvider
2025-01-21T00:26:16.402-06:00  INFO 1 --- [taskProcessor-1] o.g.k.d.service.BookMetadataLifecycle    : Library is not set to import book or read lists metadata for this provider, skipping: ComicInfoProvider
2025-01-21T00:26:16.403-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.BookMetadataLifecycle    : Provider: EpubMetadataProvider
2025-01-21T00:26:16.444-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.BookMetadataLifecycle    : Apply metadata for book: Book(name=An American Marriage (Oprah's B - Tayari Jones, url=file:/media/Neptune/Books/Fictions/An%20American%20Marriage%20(Oprah's%20B%20-%20Tayari%20Jones.epub, fileLastModified=2025-01-20T00:49:45.462, fileSize=3244898, fileHash=406ad6569222f0e6fcef579ed74a46a6, fileHashKoreader=, number=6, id=0JJJ0J7CPQYYK, seriesId=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC, deletedDate=null, oneshot=false, createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-20T23:57:50.537)
2025-01-21T00:26:16.453-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.BookMetadataLifecycle    : Original metadata: BookMetadata(numberSort=6.0, releaseDate=2019-02-03, authors=[Author(Tayari Jones, writer)], isbn='', links=[], titleLock=false, summaryLock=false, numberLock=false, numberSortLock=false, releaseDateLock=false, authorsLock=false, tagsLock=false, isbnLock=false, linksLock=false, bookId='0JJJ0J7CPQYYK', createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-21T00:14:54.450, title='An American Marriage (Oprah's Book Club)', summary='', number='6', tags=[])
2025-01-21T00:26:16.463-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.BookMetadataLifecycle    : Patch: BookMetadataPatch(title=An American Marriage (Oprah's Book Club), summary=null, number=null, numberSort=null, releaseDate=2019-02-03, authors=[Author(Tayari Jones, writer)], isbn=null, links=null, tags=null, readLists=[])
2025-01-21T00:26:16.465-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.BookMetadataLifecycle    : Patched metadata: BookMetadata(numberSort=6.0, releaseDate=2019-02-03, authors=[Author(Tayari Jones, writer)], isbn='', links=[], titleLock=false, summaryLock=false, numberLock=false, numberSortLock=false, releaseDateLock=false, authorsLock=false, tagsLock=false, isbnLock=false, linksLock=false, bookId='0JJJ0J7CPQYYK', createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-21T00:14:54.450, title='An American Marriage (Oprah's Book Club)', summary='', number='6', tags=[])
2025-01-21T00:26:16.477-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskEmitter  : Sending task: RefreshSeriesMetadata(seriesId='0JJJ0J7A2QYQ3', priority='6')
2025-01-21T00:26:16.478-06:00 DEBUG 1 --- [task-2] o.g.komga.interfaces.sse.SseController   : Publish SSE: 'BookChanged':BookSseDto(bookId=0JJJ0J7CPQYYK, seriesId=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC)
2025-01-21T00:26:16.491-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskHandler  : Task RefreshBookMetadata(bookId='0JJJ0J7CPQYYK', capabilities=[LINKS, NUMBER_SORT, RELEASE_DATE, ISBN, TAGS, READ_LISTS, THUMBNAILS, NUMBER, AUTHORS, TITLE, SUMMARY], priority='7') executed in 107.933777ms
2025-01-21T00:26:16.491-06:00 DEBUG 1 --- [task-4] o.g.k.application.tasks.TaskProcessor    : Active count: 1, Core Pool Size: 1, Pool Size: 1
2025-01-21T00:26:16.492-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Task processed, remove it from the queue: RefreshBookMetadata(bookId='0JJJ0J7CPQYYK', capabilities=[LINKS, NUMBER_SORT, RELEASE_DATE, ISBN, TAGS, READ_LISTS, THUMBNAILS, NUMBER, AUTHORS, TITLE, SUMMARY], priority='7')
2025-01-21T00:26:16.497-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Active count: 1, Core Pool Size: 1, Pool Size: 1
2025-01-21T00:26:16.497-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Try to process first available task
2025-01-21T00:26:16.509-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Found task to process: RefreshSeriesMetadata(seriesId='0JJJ0J7A2QYQ3', priority='6')
2025-01-21T00:26:16.509-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskHandler  : Executing task: RefreshSeriesMetadata(seriesId='0JJJ0J7A2QYQ3', priority='6')
2025-01-21T00:26:16.513-06:00  INFO 1 --- [taskProcessor-1] o.g.k.d.service.SeriesMetadataLifecycle  : Refresh metadata for series: Series(name=Fictions, url=file:/media/Neptune/Books/Fictions/, fileLastModified=2025-01-20T23:57:06.187, id=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC, bookCount=69, deletedDate=null, oneshot=false, createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-20T23:57:50.471)
2025-01-21T00:26:16.516-06:00  INFO 1 --- [taskProcessor-1] o.g.k.d.service.SeriesMetadataLifecycle  : Library is not set to import series or collection metadata for this provider, skipping: ComicInfoProvider
2025-01-21T00:26:16.523-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.SeriesMetadataLifecycle  : Provider: EpubMetadataProvider
2025-01-21T00:26:17.370-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.SeriesMetadataLifecycle  : Apply metadata for series: Series(name=Fictions, url=file:/media/Neptune/Books/Fictions/, fileLastModified=2025-01-20T23:57:06.187, id=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC, bookCount=69, deletedDate=null, oneshot=false, createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-20T23:57:50.471)
2025-01-21T00:26:17.374-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.SeriesMetadataLifecycle  : Original metadata: SeriesMetadata(status=ONGOING, readingDirection=LEFT_TO_RIGHT, ageRating=null, totalBookCount=null, links=[], alternateTitles=[], statusLock=false, titleLock=false, titleSortLock=false, summaryLock=false, readingDirectionLock=false, publisherLock=false, ageRatingLock=false, languageLock=false, genresLock=false, tagsLock=false, totalBookCountLock=false, sharingLabelsLock=false, linksLock=false, alternateTitlesLock=false, seriesId='0JJJ0J7A2QYQ3', createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-21T00:14:54.790, title='Fictions', titleSort='Fictions', summary='', publisher='Random House Publishing Group', language='en-US', tags=[], genres=[fiction / general, thrillers, fiction, suspense, general, mystery, thriller, fantasy, fiction / literary, fiction / historical, fiction / thrillers / suspense, fiction / mystery & detective - historical, fiction / war & military, collections & anthologies, science fiction, adventure, adult, romance, historical, contemporary, western, fiction / literary], sharingLabels=[])
2025-01-21T00:26:17.376-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.SeriesMetadataLifecycle  : Patch: SeriesMetadataPatch(title=null, titleSort=null, status=null, summary=null, readingDirection=LEFT_TO_RIGHT, publisher=Random House Publishing Group, ageRating=null, language=en-US, genres=[Fiction / General, Thrillers, Fiction, Suspense, General, Mystery, Thriller, Fantasy, Fiction / Literary, Fiction / Historical, Fiction / Thrillers / Suspense, Fiction / Mystery & Detective - Historical, Fiction / War & Military, Collections & Anthologies, Science Fiction, Adventure, Adult, Romance, Historical, Contemporary, Western, Fiction / Literary], totalBookCount=null, collections=[])
2025-01-21T00:26:17.377-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.SeriesMetadataLifecycle  : Patched metadata: SeriesMetadata(status=ONGOING, readingDirection=LEFT_TO_RIGHT, ageRating=null, totalBookCount=null, links=[], alternateTitles=[], statusLock=false, titleLock=false, titleSortLock=false, summaryLock=false, readingDirectionLock=false, publisherLock=false, ageRatingLock=false, languageLock=false, genresLock=false, tagsLock=false, totalBookCountLock=false, sharingLabelsLock=false, linksLock=false, alternateTitlesLock=false, seriesId='0JJJ0J7A2QYQ3', createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-21T00:14:54.790, title='Fictions', titleSort='Fictions', summary='', publisher='Random House Publishing Group', language='en-US', tags=[], genres=[fiction / general, thrillers, fiction, suspense, general, mystery, thriller, fantasy, fiction / literary, fiction / historical, fiction / thrillers / suspense, fiction / mystery & detective - historical, fiction / war & military, collections & anthologies, science fiction, adventure, adult, romance, historical, contemporary, western, fiction / literary], sharingLabels=[])
2025-01-21T00:26:17.391-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.SeriesMetadataLifecycle  : Provider: MylarSeriesProvider
2025-01-21T00:26:17.392-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.i.m.mylar.MylarSeriesProvider      : Series folder does not contain any series.json file: Series(name=Fictions, url=file:/media/Neptune/Books/Fictions/, fileLastModified=2025-01-20T23:57:06.187, id=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC, bookCount=69, deletedDate=null, oneshot=false, createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-20T23:57:50.471)
2025-01-21T00:26:17.393-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.d.service.SeriesMetadataLifecycle  : Provider: OneShotSeriesProvider
2025-01-21T00:26:17.395-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskEmitter  : Sending task: AggregateSeriesMetadata(seriesId='0JJJ0J7A2QYQ3', priority='6')
2025-01-21T00:26:17.396-06:00 DEBUG 1 --- [task-7] o.g.komga.interfaces.sse.SseController   : Publish SSE: 'SeriesChanged':SeriesSseDto(seriesId=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC)
2025-01-21T00:26:17.418-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskHandler  : Task RefreshSeriesMetadata(seriesId='0JJJ0J7A2QYQ3', priority='6') executed in 908.346044ms
2025-01-21T00:26:17.418-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Task processed, remove it from the queue: RefreshSeriesMetadata(seriesId='0JJJ0J7A2QYQ3', priority='6')
2025-01-21T00:26:17.418-06:00 DEBUG 1 --- [task-3] o.g.k.application.tasks.TaskProcessor    : Active count: 1, Core Pool Size: 1, Pool Size: 1
2025-01-21T00:26:17.422-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Active count: 1, Core Pool Size: 1, Pool Size: 1
2025-01-21T00:26:17.423-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Try to process first available task
2025-01-21T00:26:17.445-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Found task to process: AggregateSeriesMetadata(seriesId='0JJJ0J7A2QYQ3', priority='6')
2025-01-21T00:26:17.445-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskHandler  : Executing task: AggregateSeriesMetadata(seriesId='0JJJ0J7A2QYQ3', priority='6')
2025-01-21T00:26:17.446-06:00  INFO 1 --- [taskProcessor-1] o.g.k.d.service.SeriesMetadataLifecycle  : Aggregate book metadata for series: Series(name=Fictions, url=file:/media/Neptune/Books/Fictions/, fileLastModified=2025-01-20T23:57:06.187, id=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC, bookCount=69, deletedDate=null, oneshot=false, createdDate=2025-01-20T23:50:06, lastModifiedDate=2025-01-20T23:57:50.471)
2025-01-21T00:26:17.559-06:00 DEBUG 1 --- [task-7] o.g.komga.interfaces.sse.SseController   : Publish SSE: 'SeriesChanged':SeriesSseDto(seriesId=0JJJ0J7A2QYQ3, libraryId=0JJJ0J76TQPPC)
2025-01-21T00:26:17.561-06:00  INFO 1 --- [taskProcessor-1] o.g.komga.application.tasks.TaskHandler  : Task AggregateSeriesMetadata(seriesId='0JJJ0J7A2QYQ3', priority='6') executed in 115.757139ms
2025-01-21T00:26:17.562-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Task processed, remove it from the queue: AggregateSeriesMetadata(seriesId='0JJJ0J7A2QYQ3', priority='6')
2025-01-21T00:26:17.580-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Active count: 1, Core Pool Size: 1, Pool Size: 1
2025-01-21T00:26:17.580-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Try to process first available task
2025-01-21T00:26:17.581-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : No available task found
2025-01-21T00:26:17.582-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Try to process first available task
2025-01-21T00:26:17.583-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : No available task found
2025-01-21T00:26:17.583-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Try to process first available task
2025-01-21T00:26:17.584-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : No available task found
2025-01-21T00:26:17.588-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Try to process first available task
2025-01-21T00:26:17.599-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : No available task found
2025-01-21T00:26:17.599-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : Try to process first available task
2025-01-21T00:26:17.600-06:00 DEBUG 1 --- [taskProcessor-1] o.g.k.application.tasks.TaskProcessor    : No available task found
2025-01-21T00:26:25.546-06:00 DEBUG 1 --- [scheduling-1] o.g.komga.interfaces.sse.SseController   : Publish SSE: 'TaskQueueStatus':TaskQueueSseDto(count=0, countByType={})

Komga version

1.18.0

Operating system

Ubuntu Server 22.04.5

Installation method

Docker

Other details

Only happened to a few EPUB files. Calibre extracts the cover from the same file with no issue.

Acknowledgements

• I have searched the existing issues (open AND closed) and this is a new ticket, NOT a duplicate or related to another open issue.
• I have written a short but informative title.
• I have checked the FAQ.
• I have updated the app to the latest version.
• I will fill out all of the requested information in this form.

[gotson]

Can you provide the book file ?

[zhen-huan-hu]

Can you provide the book file ?

Here is the file Komga having issue generating the thumbnail.

An American Marriage (Oprah's B - Tayari Jones.zip

[gotson]

the epub does not register any valid cover according to EPUB2/EPUB3. Calibre might be doing some guessing to retrieve the cover. That's a book problem.

[gotson]

i've added some guessing work to find the cover for non-standard books

[github-actions]

🎉 This issue has been resolved in 1.19.0 (Release Notes)