Re: Upgrade to 5.0.0 resulted in IOException message

That makes sense.  I am using an ant script to unjar individual jars and
then to create a mega jar from my classes and those APIs.  I am keeping the
services files.  That said, I noticed that both the main poi and the
poi-ooxml jar have services files with the same name; however, different
content.  What is the proper way to include those?  Should I create one
file that contains the content from both (i.e.
org.apache.poi.extractor.MainExtractorFactory,
org.apache.poi.ooxml.extractor.POIXMLExtractorFactory)?

Thank you,

Bryan

On Fri, Feb 5, 2021 at 6:27 AM Nick Burch <[email protected]> wrote:

> On Wed, 3 Feb 2021, Bryan Coleman wrote:
> > java.io.IOException: Your InputStream was neither an OLE2 stream, nor an
> > OOXML stream or you haven't provide the poi-ooxml*.jar in the
> > classpath/modulepath - FileMagic: OLE2, having providers:
> > [org.apache.poi.xssf.usermodel.XSSFWorkbookFactory@40086342]
>
> That's very odd - you have the main POI jar there (need it for
> WorkbookFactory), but somehow have lost the reference to the HSSF classes
> which also live there...
>
> > Note: It works when running in my IDE; however, when it runs from a
> > (mega) jar (built by ant), we get the exception above.
>
> Ah, I suspect something is clobbering some files when it merges stuff into
> a mega jar. My guess is it's the /META-INF/services files, and your mega
> jar is taking just one rather than merging as it needs to
>
> Can you post details of how you're building the mega jar, and/or look up
> how to get the tool/task you're using to merge not overwrite ServiceLoader
> / Java Service Provider Interface services files?
>
> Nick
>