apache.pdfbox.pdfparser.XrefTrailerResolver flood in log

My log is flooded with

WARN [scheduler_Worker-1] [apache.pdfbox.pdfparser.XrefTrailerResolver] setStartxref Did not found XRef object at specified startxref position 12345

Is it possible to resolve this somehow? And what this warning means?

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Accepted answer

It seems that I was able to fix this by adding line

log4j.logger.org.apache.pdfbox=ERROR

to /confluence/WEB-INF/classes/log4j.properties and restarting Confluence.

To verify:

  • upload pdf file to page and you will see such WARN in log
  • make changes in log4j and try to upload another pdf file. Now there are no such WARNs in log

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