nested exception is NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{KjBKpY-HSnyxnyHJr-sOLA}{127.0.0.1}{127.0.0.1:9300}]]] with root cause

nested exception is NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{KjBKpY-HSnyxnyHJr-sOLA}{127.0.0.1}{127.0.0.1:9300}]]] with root cause

非常感谢老师的分享课。我听了三四遍，代码和配置和老师一样，为什么每次都报这个错