Export and remove operations will not start in Confluence

Summary

The following operations in Confluence will fail to start and be stuck at 0%

• Page export to PDF
• Space export
• Removal of Space

Environment

Steps to Reproduce

• Do a Page export to PDF

Expected Results

• Exports or space removal should succeed.

Actual Results

• Operation will be stuck at 0% 

Notes

Some jobs in the Confluence queue at the backend are clogged up.

Workaround

Restart Confluence to clear up the queue.