'Unable to render include The included page could not be found.' message displayed for include-page macros after upgrading Confluence

Summary

When upgrading Confluence 5.4.X to 5.7.x, if there are pages that have an include-page macro that points to a blog post it will display an 'Unable to render The included page could not be found' error instead of the included page

Reproduction steps:

1. Install Confluence 5.4.4
2. Create a blog post
3. Create a blank page, add an include-page macro that points to the previously created blog post
4. Save the page and see that it renders correctly
5. Stop Confluence
6. Upgrade to Confluence 5.7.1
7. Go back to the page created in step 3

Expected behavior

The blog post is rendered in the page

Actual behavior

'Unable to render The included page could not be found' is displayed instead of the blog post's contents

Related Notes

• If you look at the storage format you can tell the difference in how blog posts are linked:
  • Confluence 5.4.4

    • <p><ac:structured-macro ac:name="include"><ac:parameter ac:name=""><ac:link><ri:page ri:content-title="2015/03/11/This is a blog post" /></ac:link></ac:parameter></ac:structured-macro></p>

  • Confluence 5.7.1

    • <p><ac:structured-macro ac:name="include"><ac:parameter ac:name=""><ac:link><ri:blog-post ri:content-title="This is a blog post" ri:posting-day="2015/03/11" /></ac:link></ac:parameter></ac:structured-macro></p>

• It looks like there should be an upgrade job that finds existing include-page macros and convert them to the new format, and it either doesn't exist or is not working.

Workaround

1. Edit the include macro and add a / before the start of the date.
2. Save and view the page