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Confluence Data Center 9.2.5 – ZDU REST API endpoints returning 404

Asmaa Elsayed July 31, 2025

Context:

  • Running Confluence Data Center v9.2.5, which officially supports the Zero Downtime Upgrade (ZDU) REST API community.atlassian.com+15confluence.atlassian.com+15community.atlassian.com+15.

  • Remote API (XML-RPC & SOAP) is enabled in the Further Configuration settings.

  • All REST calls (including GET /rest/api, GET /rest/zdu/cluster/zdu, and /rest/zdu/cluster/zdu/state) return 404 Not Found.

  • No known context path (e.g. /confluence) is confirmed; both with and without prefix return errors.

What I’ve tried:

  • Curling https://<host>/rest/api

  • Curling https://<host>/confluence/rest/api

  • Curling GET and POST to /rest/zdu/cluster/zdu, /state, /start, etc.

  • Verified Data Center license and admin permissions

Issue:
Unable to access any ZDU endpoints, despite official documentation stating they should be available in this release community.atlassian.com+3confluence.atlassian.com+3community.atlassian.com+3developer.atlassian.com+1confluence.atlassian.com+1.

Questions:

  1. Are there known configuration issues or feature flags in v9.2.5 that disable ZDU REST APIs?

  2. Could custom context path or reverse‑proxy routing omit the /rest/zdu/cluster/zdu endpoints?

  3. How can I verify if the ZDU endpoint plugin/module is enabled on my Confluence cluster?

  4. Any community experience diagnosing missing REST endpoints in Confluence Data Center?

2 answers

1 vote
Brant Schroeder
Community Champion
July 31, 2025

@Asmaa Elsayed are you able to access any of the web services?  Can you connect to any Confluence API?  Just want to make sure that it is not a firewall rule.

Aron Gombas _Midori_
Community Champion
July 31, 2025

@Asmaa Elsayed  Exactly my idea. Why don't you test the most trivial end-point first? There is a "server info" one which may not even require authentication...

With that you could learn if all end-points are failing, or only ZDU. That's important for your troubleshooting.

0 votes
Marc - Devoteam
Rising Star
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July 31, 2025

Hi @Asmaa Elsayed 

Do you have a cluster setup, I mean do you have multiple Confluence servers running or do you only run a single instance?

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