[errorStatus changed from green to red - Request Timeout after 3000ms

kibana莫名其妙就一直报着个错，查了群集健康状态是正常的。而且服务会down掉

log [03:22:40.595] [error][status][plugin:monitoring@5.2.2] Status changed from green to red - Request Timeout after 3000ms
log [03:22:40.604] [error][status][plugin:xpack_main@5.2.2] Status changed from green to red - Request Timeout after 3000ms
log [03:22:40.605] [error][status][plugin:graph@5.2.2] Status changed from green to red - Request Timeout after 3000ms
log [03:22:40.606] [error][status][plugin:reporting@5.2.2] Status changed from green to red - Request Timeout after 3000ms
log [03:22:40.606] [error][status][plugin:security@5.2.2] Status changed from green to red - Request Timeout after 3000ms
log [03:22:40.607] [error][status][plugin:searchprofiler@5.2.2] Status changed from green to red - Request Timeout after 3000ms
log [03:22:40.608] [error][status][plugin:tilemap@5.2.2] Status changed from green to red - Request Timeout after 3000ms
log [03:22:40.609] [error][status][plugin:elasticsearch@5.2.2] Status changed from green to red - Request Timeout after 3000ms
log [03:22:40.610] [error][status][ui settings] Status changed from green to red - Elasticsearch plugin is red