Signing service now produces SHA384withSHA384withRSA instead of SHA384withRSA

Summary

More and more Eclipse older than 2021-06 builds and installations are starting to fail due to an unsupported signing algorithm in their dependencies. I suspect that the signing service is again running Java17 as per the related #2035 (closed).

I already reported a related #2604 (closed) issue that also acts a reproducible result, but as mentioned before, more and more things start to fail, e.g. installing Eclipse JustJ, as their signing info is not compatible with these older Eclipse versions.

Steps to reproduce

Just download Eclipse 2020-06 IDE for Java Developers and try to install the latest Eclipse JustJ JRE 11 release. This results in the following error:

Priority

• Urgent
• High
• Medium
• Low

Severity

• Blocker
• Major
• Normal
• Low

Impact

It blocks releases and installations.