打开文件过多

报错日志如下，不知道是什么原因导致的：

2021-10-15 16:55:22.045 [com.alibaba.nacos.client.naming.updater] ERROR com.alibaba.nacos.client.naming:548 - request: /nacos/v1/ns/instance/list failed, servers: [192.168.1.199:8848], code: 500, msg: Too many open files 2021-10-15 16:55:30.039 [com.alibaba.nacos.client.naming.updater] ERROR com.alibaba.nacos.client.naming:613 - [NA] failed to request java.net.SocketException: Too many open files at java.net.Socket.createImpl(Socket.java:478) at java.net.Socket.connect(Socket.java:605) 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.common.http.client.request.JdkHttpClientRequest.execute(JdkHttpClientRequest.java:109) at com.alibaba.nacos.common.http.client.NacosRestTemplate.execute(NacosRestTemplate.java:482) at com.alibaba.nacos.common.http.client.NacosRestTemplate.exchangeForm(NacosRestTemplate.java:427) at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:599) at com.alibaba.nacos.client.naming.net.NamingProxy.reqApi(NamingProxy.java:524) at com.alibaba.nacos.client.naming.net.NamingProxy.reqApi(NamingProxy.java:491) at com.alibaba.nacos.client.naming.net.NamingProxy.reqApi(NamingProxy.java:486) at com.alibaba.nacos.client.naming.net.NamingProxy.queryList(NamingProxy.java:400) at com.alibaba.nacos.client.naming.core.HostReactor.updateService(HostReactor.java:339) at com.alibaba.nacos.client.naming.core.HostReactor$UpdateTask.run(HostReactor.java:420) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) 2021-10-15 16:55:30.039 [com.alibaba.nacos.client.naming.updater] ERROR com.alibaba.nacos.client.naming:613 - [NA] failed to request

原提问者GitHub用户aliujb