Problem

After upgrading to Confluence 5.6.X or above, PPTX documents attached while on older versions still fail to render.

The following appears in the atlassian-confluence.log:

2015-03-03 10:39:38,688 WARN [http-bio-443-exec-13793] [com.benryan.conversion.PPTSlideServlet] doGet Conversion task timed out for attachment : Test.pptx with page number 0, waited : 300, now executing in background.

Diagnosis

Environment

• A Confluence 5.6.X instance that includes PPTX documents that were attached prior to upgrading to Confluence 5.6.X

Cause

Confluence versions prior to 5.6.X do not support PPTX, and create a corrupted cached file in <confluence_home>/viewfile

Workaround

• Clear the file preview caches

  1. Stop Confluence
  2. In the filesystem go to your <confluence_home> folder
  3. Delete the contents within the following folders (or move the entire folder to another directory)
     1. <confluence_home>/viewfile

     2. <confluence_home>/shared-home/dcl-document/

     3. <confluence_home>/shared-home/dcl-document_hd/

     4. <confluence_home>/shared-home/dcl-thumbnail/

  4. Start Confluence
• The file preview cache will rebuild, and documents should render as expected

Resolution

  CONF-32515 - Getting issue details... STATUS is a resolved bug covering this problem. Confluence 5.7 introduced a new File Viewer to Display Files and Images. Upgrade to Confluence 5.7 or higher.