epub file, Unknown error while analyzing book, java.lang.NullPointerException: null

[noxiousnick]

Steps to reproduce

1. Added large epub file collection to library
2. Scan library for new files
3. Most files accepted just fine, a small percentage get the error described here

Expected behavior

Book added to library with no errors, cover generated, book able to be read.

Actual behavior

Media Management shows "Unknown error while analyzing book". Cover unable to be generated. Book epub file unable to be parsed. Logs only give me this error: java.lang.NullPointerException: null.

Logs

2024-01-09T11:52:15.141-05:00  INFO 1 --- [io-25600-exec-2] o.g.komga.application.tasks.TaskEmitter  : Sending task: AnalyzeBook(bookId='0ERPR1P1KEPBC', priority='6')
2024-01-09T11:52:15.238-05:00  INFO 1 --- [askProcessor-13] o.g.komga.application.tasks.TaskHandler  : Executing task: AnalyzeBook(bookId='0ERPR1P1KEPBC', priority='6')
2024-01-09T11:52:15.239-05:00  INFO 1 --- [askProcessor-13] o.g.komga.domain.service.BookLifecycle   : Analyze and persist book: Book(name=A Cave King's Road to Paradise - Volume 01 [J-Novel Club][Premium], url=file:/data/Officially%20Translated%20Light%20Novels/A%20Cave%20King's%20Road%20to%20Paradise/A%20Cave%20King's%20Road%20to%20Paradise%20-%20Volume%2001%20%5BJ-Novel%20Club%5D%5BPremium%5D.epub, fileLastModified=2023-12-08T09:28:28.028, fileSize=48517033, fileHash=9a9723533a7d39d98e8e18ac0ec36e3c, number=1, id=0ERPR1P1KEPBC, seriesId=0ERPR1P1FET59, libraryId=0ERPPXSPQEMXQ, deletedDate=null, oneshot=false, createdDate=2024-01-08T10:57:29, lastModifiedDate=2024-01-08T13:39:31.210)
2024-01-09T11:52:15.241-05:00  INFO 1 --- [askProcessor-13] o.g.komga.domain.service.BookAnalyzer    : Trying to analyze book: Book(name=A Cave King's Road to Paradise - Volume 01 [J-Novel Club][Premium], url=file:/data/Officially%20Translated%20Light%20Novels/A%20Cave%20King's%20Road%20to%20Paradise/A%20Cave%20King's%20Road%20to%20Paradise%20-%20Volume%2001%20%5BJ-Novel%20Club%5D%5BPremium%5D.epub, fileLastModified=2023-12-08T09:28:28.028, fileSize=48517033, fileHash=9a9723533a7d39d98e8e18ac0ec36e3c, number=1, id=0ERPR1P1KEPBC, seriesId=0ERPR1P1FET59, libraryId=0ERPPXSPQEMXQ, deletedDate=null, oneshot=false, createdDate=2024-01-08T10:57:29, lastModifiedDate=2024-01-08T13:39:31.210)
2024-01-09T11:52:15.356-05:00  INFO 1 --- [askProcessor-13] o.g.komga.domain.service.BookAnalyzer    : Detected media type: application/zip
2024-01-09T11:52:15.791-05:00 ERROR 1 --- [askProcessor-13] o.g.komga.domain.service.BookAnalyzer    : Error while analyzing book: Book(name=A Cave King's Road to Paradise - Volume 01 [J-Novel Club][Premium], url=file:/data/Officially%20Translated%20Light%20Novels/A%20Cave%20King's%20Road%20to%20Paradise/A%20Cave%20King's%20Road%20to%20Paradise%20-%20Volume%2001%20%5BJ-Novel%20Club%5D%5BPremium%5D.epub, fileLastModified=2023-12-08T09:28:28.028, fileSize=48517033, fileHash=9a9723533a7d39d98e8e18ac0ec36e3c, number=1, id=0ERPR1P1KEPBC, seriesId=0ERPR1P1FET59, libraryId=0ERPPXSPQEMXQ, deletedDate=null, oneshot=false, createdDate=2024-01-08T10:57:29, lastModifiedDate=2024-01-08T13:39:31.210)

java.lang.NullPointerException: null
        at org.gotson.komga.infrastructure.mediacontainer.epub.EpubExtractor.computePositions(EpubExtractor.kt:181) ~[classes/:1.10.0]
        at org.gotson.komga.infrastructure.mediacontainer.epub.EpubExtractor.getManifest(EpubExtractor.kt:80) ~[classes/:1.10.0]
        at org.gotson.komga.domain.service.BookAnalyzer.analyzeEpub(BookAnalyzer.kt:131) ~[classes/:1.10.0]
        at org.gotson.komga.domain.service.BookAnalyzer.analyze(BookAnalyzer.kt:78) ~[classes/:1.10.0]
        at org.gotson.komga.domain.service.BookLifecycle.analyzeAndPersist(BookLifecycle.kt:77) ~[classes/:1.10.0]
        at org.gotson.komga.application.tasks.TaskHandler.handleTask(TaskHandler.kt:89) ~[classes/:1.10.0]
        at org.gotson.komga.application.tasks.TaskProcessor.takeAndProcess(TaskProcessor.kt:60) ~[classes/:1.10.0]
        at org.gotson.komga.application.tasks.TaskProcessor.processAvailableTask$lambda$1(TaskProcessor.kt:46) ~[classes/:1.10.0]
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) ~[na:na]
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) ~[na:na]
        at java.base/java.lang.Thread.run(Unknown Source) ~[na:na]

2024-01-09T11:52:15.830-05:00  INFO 1 --- [askProcessor-13] o.g.komga.application.tasks.TaskHandler  : Task AnalyzeBook(bookId='0ERPR1P1KEPBC', priority='6') executed in 591.563869ms

Komga version

v1.10.0-master

Operating system

Debian 11

Installation method

Docker

Other details

This Komga instance is running on a Raspberry Pi 4 using Debian 11 and installed through Docker using the latest container image. All my epub files are from the same collection where the majority of them work. I wouldn't be surprised if there was "something different" about these files like a zip or rar version, but I cannot find anything in the logs to indicate what's different or what's wrong with them.

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 that fails to analyze?

[noxiousnick]

Should I attach the epub file here or send it through some other channel? I can attach examples of working and non-working files from the same collection if that helps to diagnose.

[gotson]

Should I attach the epub file here or send it through some other channel? I can attach examples of working and non-working files from the same collection if that helps to diagnose.

whatever works for you, i just need the book

[noxiousnick]

Reached out on discord, thanks!

[gotson]

Reached out on discord, thanks!

Thanks, that's helpful.

Basically the ebook has an issue:

• the spine mentions this page: <itemref idref="jln.xhtml"/>
• it corresponds to this manifest resource <item id="jln.xhtml" href="Text/jln.xhtml" media-type="application/xhtml+xml"/>
• however the file is not present in the zip

I will add a fix in Komga not to throw an error, but reading the book may still throw some errors.

[gotson]

Note also that the book you provided do not have any epub2/3 metadata for the cover, so it does not have a thumbnail in Komga.

[github-actions]

🎉 This issue has been resolved in 1.10.2 (Release Notes)