zabbix_server.log里出现如下报错，怎么办？

zabbix_server.log里出现如下报错：
95213:20180101:154323.271 cannot send list of active checks to "10.0.8.20": host [jumpserver01.kevin.cn] not found
95212:20180101:154323.549 cannot send list of active checks to "10.0.56.21": host [cx-app02.kevin.cn] not found
95216:20180101:154324.768 cannot send list of active checks to "10.0.54.21": host [bl2-app02.kevin.cn] not found
95212:20180101:154325.072 cannot send list of active checks to "10.0.52.22": host [nc-app02.kevin.cn] not found