服务连接nacos报错，too many openfile ,这个问题怎么解决？

2023-02-01 01:48:26,334 [http-nio-8269-exec-4] ERROR [com.alibaba.nacos.client.config.impl.ClientWorker] ClientWorker.java:221 - [fixed-172.18.187.17_8848-66aafefd-42be-458f-b2ce-c62cb85cb173] [sub-server] get server config exception, dataId=db_version.properties, group=DEFAULT_GROUP, tenant=66aafefd-42be-458f-b2ce-c62cb85cb173 java.net.SocketException: Too many open files at java.net.Socket.createImpl(Socket.java:477) at java.net.Socket.connect(Socket.java:604) at sun.net.NetworkClient.doConnect(NetworkClient.java:175) at sun.net.www.http.HttpClient.openServer(HttpClient.java:463) at sun.net.www.http.HttpClient.openServer(HttpClient.java:558) at sun.net.www.http.HttpClient.(HttpClient.java:242) at sun.net.www.http.HttpClient.New(HttpClient.java:339) at sun.net.www.http.HttpClient.New(HttpClient.java:357) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1226) at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1162) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:990) at com.alibaba.nacos.client.config.impl.HttpSimpleClient.httpGet(HttpSimpleClient.java:63) at com.alibaba.nacos.client.config.http.ServerHttpAgent.httpGet(ServerHttpAgent.java:77) at com.alibaba.nacos.client.config.http.MetricsHttpAgent.httpGet(MetricsHttpAgent.java:48) at com.alibaba.nacos.client.config.impl.ClientWorker.getServerConfig(ClientWorker.java:216) at com.alibaba.nacos.client.config.NacosConfigService.getConfigInner(NacosConfigService.java:158) at com.alibaba.nacos.client.config.NacosConfigService.getConfig(NacosConfigService.java:114) at org.springframework.cloud.alibaba.nacos.endpoint.NacosConfigHealthIndicator.doHealthCheck(NacosConfigHealthIndicator.java:57) at org.springframework.boot.actuate.health.AbstractHealthIndicator.health(AbstractHealthIndicator.java:82) at org.springframework.boot.actuate.health.CompositeHealthIndicator.health(CompositeHealthIndicator.java:95) at org.springframework.boot.actuate.health.HealthEndpoint.health(HealthEndpoint.java:50) at org.springframework.boot.actuate.health.HealthEndpointWebExtension.health(HealthEndpointWebExtension.java:53) at sun.reflect.GeneratedMethodAccessor289.invoke(Unknown Source)