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Ch.qos.logback conflict


#1

i’m trying to upgrade to groupdocs conversion 19.6. i’m able to compile fine, but when i run a conversion i get the following exception which indicates that there’s a conflict ch.qos.logback.classic.LoggerContext (maybe something you have compiled in?). can ya’ll shed some light on this for me?

14:42:36.034 [main] DEBUG com.instructure.knightrider.converters.GroupDocsConverterImpl - Starting conversion of: demo.docx to PDF

Exception in thread "main" java.lang.IncompatibleClassChangeError: Class ch.qos.logback.classic.LoggerContext does not implement the requested interface org.slf4j.a

at org.slf4j.c.OR(Unknown Source)

at org.slf4j.c.bf(Unknown Source)

at com.joestelmach.natty.i.<clinit>(Unknown Source)

at com.groupdocs.conversion.domain.documents.PdfDocument.parse(Unknown Source)

at com.groupdocs.conversion.domain.documents.PdfDocument.dp(Unknown Source)

at com.groupdocs.conversion.domain.documents.PdfDocument.a(Unknown Source)

at com.groupdocs.conversion.domain.documents.PdfDocument.a(Unknown Source)

at com.groupdocs.conversion.domain.documents.PdfDocument.a(Unknown Source)

at com.groupdocs.conversion.domain.DocumentBase.load(Unknown Source)

at com.groupdocs.conversion.domain.DocumentLoader.a(Unknown Source)

at com.groupdocs.conversion.domain.DocumentLoader.load(Unknown Source)

at com.groupdocs.conversion.domain.DocumentLoader.load(Unknown Source)

at com.groupdocs.conversion.operations.f.aK(Unknown Source)

at com.groupdocs.conversion.operations.F.execute(Unknown Source)

at com.groupdocs.conversion.converter.pdf.PdfConverter.convert(Unknown Source)

at com.groupdocs.conversion.converter.pdf.PdfConverter.convert(Unknown Source)

at com.groupdocs.conversion.handler.ConversionHandler.aJ(Unknown Source)

at com.groupdocs.conversion.handler.ConversionHandler.convert(Unknown Source)

at com.groupdocs.conversion.handler.ConversionHandler.convert(Unknown Source)

at com.instructure.knightrider.converters.GroupDocsConverterImpl.convert(GroupDocsConverterImpl.java:73)

at com.instructure.knightrider.commandline.ConvertFile.main(ConvertFile.java:91)

#2

@bkirkby,

We are looking into this scenario. Your investigation ticket ID is CONVERSIONJAVA-732. As we have any further update, you’ll be notified.
We’ll let you know if we require any information from you.


#3

@bkirkby,

Please try to reproduce issue using 19.6.3.
If issue still persists, share a simple (console based) application with us including pom.xml using that issue could be reproduced?
Also share your development environment details:

  • OS
  • IDE