Please the documentation on Apache Oak Restriction Management: https://jackrabbit.apache.org/oak/docs/security/authorization/restriction.html#rep-glob-details-and-examples The examples are quite helpful.

what would like to store in that field? And what should this information get used for?

For reference: it has been implemented in the meanwhile, see https://experienceleague.adobe.com/en/docs/experience-manager-learn/cloud-service/content-delivery/custom-error-pages (CDN error pages)

My observation is that many customers use it, but it is not officially supported by Adobe.(Also I want to point out, that the official Groovy release notes for Groovy 5.0 mention, that it was tested with Java 20. No mentioning of Java 21 or any later version.)

Why do you deploy 800 megabytes of pages and assets to your (PROD) author and publish instances? On which environment do you create the content of this package? And what was the role of the PROD authoring instance in your setup? Did you use it to create and maintain PROD content? In AEM it was alway...

while you always implement code like suggested by @narendiran_ravi , I would like to understand why you need to that distinction.If you need to configure different OSGI configuration for DEV and UAT (which is a DEV in AEM CS terms), you can manage them through environment variables. See https://expe...

Adobe does test its own platform, but Adobe cannot do a test of your application.

I just heard from colleagues about a very similar problem (maybe the same?) with AEM 6.5 SP21.Please report it to Adobe support, but I think that a bugfix is already on its way.

please run a number of threaddumps (eg. 10 dumps with 1s delay between them) on publish during such a situation, that should allow you check details.

Can you please share the relevant parts of the exceptions?