Background images on PDF do not render correctly when using PDF macro


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Workaround listed on this page is valid only for confluence versions 5.3-5.8. If your version is outside of this version workaround won't help.


After inserting a PDF into a Page in Confluence, parts of the PDF image do not render. In this example there should be a background image but instead it is just dark gray:



atlassian-confluence.log に次のメッセージが表示される。

WARN [http-bio-5553-exec-4] [com.benryan.conversion.PPTSlideServlet] doGet Conversion task timed out for attachment : File_Name.pdf with page number 0, 
waited : 300, now executing in background.


Disabling this memory guard can cause OutOutMemoryErrors if a high resolution image is embedded in a PDF. 


  1. Open <confluence_install>/bin/ in the editor of your choice
  2. Find the line that starts with JAVA_OPTS=
    • For example, the line may look like JAVA_OPTS="-Xms1024m -Xmx1024m -XX:MaxPermSize=512m $JAVA_OPTS -Djava.awt.headless=true "
  3. Add the following to the end of the line: -Dpdf.render.memory.guard.disabled=true
    • For example, the line will now be: JAVA_OPTS="-Xms1024m -Xmx1024m -XX:MaxPermSize=512m $JAVA_OPTS -Djava.awt.headless=true -Dpdf.render.memory.guard.disabled=true "
  4. Save the file.
  5. Restart confluence
  6. Navigate to the page with the PDF attached to it, remove the embedded PDF macro and delete the attachment (or you could simply delete the page and recreate)
  7. Re-attach the PDF


Currently unresolved, see  CONF-33763 - Getting issue details... STATUS  for more information or to leave comments.

最終更新日 2018 年 11 月 2 日


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