Issue Summary

AFter a user upgrades to 6.13, there is log WARNings about duplicate packages. Users are unsure if there is a functional impact or if they should intervene in some way.

Environment

Confluence

Steps to Reproduce

1. Upgrade from Confluence 6.6. to 6.13
2. Tail the logs after 6.13 start up

Expected Results

No warnings about duplicates

Actual Results

You receive the following in the logs:

2019-02-07 16:43:34,940 WARN [localhost-startStop-2] [org.twdata.pkgscanner.ExportPackageListBuilder] logDuplicateWarning Package Scanner found duplicates for package 'javax.annotation' with different versions. Files: jsr305-3.0.1.jar and javax.annotation-api-1.3.2.jar
  '/data/atlassian/confluence/atlassian-confluence-6.13.1/confluence/WEB-INF/lib/jsr305-3.0.1.jar'
  '/data/atlassian/confluence/atlassian-confluence-6.13.1/confluence/WEB-INF/lib/javax.annotation-api-1.3.2.jar'

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available

Notes

There doesn't appear to be any functional impact to this other than creating uncertainty in the users and subsequently contacting support to ask for guidance on whether they need to address the duplicate issue