今天在部署es集群的时候,发现它报了下面这样的一个错误:uncaughtexceptioninthread[main]java.lang.IllegalArgumentException:unknownsetting[discovery.send_hosts]pleasecheckthatanyrequiredpluginsareinstalled,orcheckthebreakingchangesdocumentationforremovedsettingsatorg.elasticsearch.common.settings.AbstractScopedSettings.validate(