With Java 11, following warning appears in logs
JAXBContext implementation could not be found. WADL feature is disabled.
2021-12-10 06:44:38 INFO: Character encoding: UTF-8 charset: UTF-8
2021-12-10 06:44:38 INFO: Version: 4.14
2021-12-10 06:44:38 INFO: Starting server...
2021-12-10 06:44:38 INFO: jetty-10.0.6; built: 2021-06-29T15:28:56.259Z; git: 37e7731b4b142a882d73974ff3bec78d621bd674; jvm 11.0.8+10-LTS
2021-12-10 06:44:38 INFO: Started o.t.w.@506aa618{/,null,AVAILABLE}
2021-12-10 06:44:38 INFO: Session workerName=node0
2021-12-10 06:44:39 WARN: JAXBContext implementation could not be found. WADL feature is disabled.
2021-12-10 06:44:39 INFO: Health check enabled with period 480000
2021-12-10 06:44:41 INFO: [38dbaea7] connected
2021-12-10 06:44:42 INFO: [6a2bd583] connected
2021-12-10 06:44:45 INFO: user: 1, action: login
You can safely ignore it.
With Java 11, following warning appears in logs
JAXBContext implementation could not be found. WADL feature is disabled.