after we updated our jenkins installation from 2.214 to 2.217 today we encountered a serious problem with the updated winstone-jetty:
There is only one certificate in our jenkins keystore, wich is a JKS based keystore. It seems to be connected to the jetty-9.4.23 update (Releasenotes entry: 4325 Deprecate SniX509ExtendedKeyManager constructor without SslContextFactory$Server)
Jenkins startup was aborted.
After a downgrade to jenkins 2.214 everything was fine again.