Use AdoptOpenJDK 11.0.6 at Github Actions
Use AdoptOpenJDK 11.0.6 at Github Actions

This is an attempt to solve this issue:

[INFO] Running org.apache.wicket.cdi.ConversationPropagatorTest
[ERROR] Tests run: 8, Failures: 0, Errors: 8, Skipped: 0, Time elapsed: 1 s <<< FAILURE! - in org.apache.wicket.cdi.ConversationPropagatorTest
[ERROR] testPropagationAllBookmarkable  Time elapsed: 0.013 s  <<< ERROR!
java.io.IOException: cannot connect to jrt:/org.openjsse

[ERROR] testPropagationNonBookmarkable  Time elapsed: 0 s  <<< ERROR!
java.io.IOException: cannot connect to jrt:/org.openjsse

[ERROR] testPropagationAllHybridRefresh  Time elapsed: 0 s  <<< ERROR!
java.io.IOException: cannot connect to jrt:/org.openjsse

which seems to have started with
https://github.com/apache/wicket/runs/380911847?check_suite_focus=true
https://github.com/apache/wicket/commit/65e2266d8b205d3768986c3e6ad548cfb3759d35

mosoft521/wicket,apache/wicket,mosoft521/wicket,apache/wicket,apache/wicket,mosoft521/wicket,mosoft521/wicket,mosoft521/wicket,apache/wicket,apache/wicket