mdt gone ?

Summary

I have serveral jobs which depend on OCL and/or UML that started failing because the corresponding p2 repo are no longer available where they used to be.

Example on Sirius:

[ERROR] Failed to resolve target definition file:/home/jenkins/agent/workspace/sirius-canary/packaging/org.eclipse.sirius.parent/../../releng/org.eclipse.sirius.targets/./sirius_canary.target: Failed to load p2 metadata repository from location https://download.eclipse.org/modeling/mdt/uml2/updates/interim/latest: No repository found at https://download.eclipse.org/modeling/mdt/uml2/updates/interim/latest.
Example on GMF Runtime

[ERROR] Failed to resolve target definition file:/home/jenkins/agent/workspace/gmf-runtime-all/PLATFORM/2025-09/jdk/temurin-jdk21-latest/label/migration/releng/org.eclipse.gmf.runtime.target/2025-09.target: Failed to load p2 metadata repository from location https://download.eclipse.org/modeling/mdt/ocl/builds/release/6.22.0: No repository found at https://download.eclipse.org/modeling/mdt/ocl/builds/release/6.22.0.

Indeed, when I go to the corresponding URLs I get a "Not found".

Looking at https://download.eclipse.org/justj/?file=modeling, the mdt subfolder of modeling is no longer where it used to be.

I see that the SimRel references UML and OCL from there, so it might be impacted. But the last build is green there, so either the change is recent or I misinterpreted something.

/cc @emerks

Steps to reproduce

Launch a job which references OCL or UML releases from inside https://download.eclipse.org/modeling/mdt/, which used to work until yesterday.

What is the current bug behavior?

The p2 repos in question, which have been there for years, are not available, and the builds fail.

What is the expected correct behavior?

p2 repos, in particular for releases (e.g. OCL 6.22) should never disappear or move (at least not without some kind of redirect).

Priority

Urgent
High
Medium
Low

Severity

Blocker
Major
Normal
Low

Impact

I can't make new builds for GMF and Sirius to prepare for 2025-12