The cglib library is not compatible with Java 17 and we need to get rid of it. As it comes in transitively through jackrabbit-ocm we can either replace or fix the latter:

• Since jackrabbit-ocm is not supported anymore (last commit is 11 years old). Our safest bet is to replace it with an update technology. However, we need to think about how to maintain backward compatibility since we allow using the jackrabbit-ocm annotations in client code. See e.g. in the workflow module.
• Probably quicker (but also dirtier) is to replace cglib with byte-buddy in jackrabbit-ocm (maybe even fork it!?).

Implementation note

Due to backward compatibility concerns (the jackrabbit-ocm annotations being exposed through our public API) we might consider fixing this in jackrabbit-ocm first while at the same time deprecating its usage on our side. In a next step we would reimplement the functionality and remove the deprecated jackrabbit-ocm one. This would have the advantage of fixing jackrabbit-ocm being relatively easy (replace cgLib with ByteBuddy) while at the same time giving us and our users some grace period.

Discovery

• This branch records some experiments performed by mgeljic for reimplementing TasksStore without Jackrabbit OCM. See also this discussion on Slack regarding forces in favour / against implementing a replacement on our side vs. fixing this in Jackrabbit OCM directly.
• Since TASKMGMT-66, we have our own fork of jackrabbit-ocm. We can use that one to resolve this ticket.