Nacos报错问题之启动报错找不到服务如何解决

问题一：关于远程nacos的问题

我在本地环境开发，配置云服务器启动的nacos，nacos控制台服务列表能看到注册服务成功，并且使用也不会有什么问题。但是本地日志一直报错 "[NACOS ConnectException httpPost] currentServerAddr: http://localhost:8848, err: Connection refused: connect " ,这是什么情况啊？

原提问者GitHub用户xpp666

参考回答：

Nacos-Config 相关的配置，需要配置在bootstrap.properties.

原回答者GitHub用户yuhuangbin

关于本问题的更多回答可点击原文查看：https://developer.aliyun.com/ask/519472?spm=a2c6h.14164896.0.0.55552a4ebXrKVa

问题二：Nacos 作为 Seata 配置中心时，项目启动报错找不到服务。如何排查，如何处理?

Nacos 作为 Seata 配置中心时，项目启动报错找不到服务。如何排查，如何处理?

参考回答：

异常：io.seata.common.exception.FrameworkException: can not register RM,err:can not connect to services-server.

查看nacos配置列表，seata配置是否已经导入成功

查看nacos服务列表，serverAddr是否已经注册成功

检查client端的registry.conf里面的namespace，registry.nacos.namespace和config.nacos.namespace填入nacos的命名空间ID，默认""，server端和client端对应，namespace 为public是nacos的一个保留控件，如果您需要创建自己的namespace，最好不要和public重名，以一个实际业务场景有具体语义的名字来命名

nacos上服务列表，serverAddr地址对应ip地址应为seata启动指定ip地址，如：sh seata-server.sh -p 8091 -h 122.51.204.197 -m file

查看seata/conf/nacos-config.txt 事务分组service.vgroupMapping.trade_group=default配置与项目分组配置名称是否一致

telnet ip 端口 查看端口是都开放，以及防火墙状态 注：1.080版本启动指定ip问题，出现异常Exception in thread "main" java.lang.RuntimeException: java.net.BindException: Cannot assign request address，请升级到081以上版本 2.项目使用jdk13，启动出现 Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit. 如环境为sh，替换脚本中最后一段： exec "JAVACMD"JAVACMD"JAVACMD" JAVA_OPTS -server -Xmx2048m -Xms2048m -Xmn1024m -Xss512k -XX:SurvivorRatio=10 -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=256m -XX:MaxDirectMemorySize=1024m -XX:-OmitStackTraceInFastThrow -XX:-UseAdaptiveSizePolicy -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath="BASEDIR"/logs/javaheapdump.hprof−XX:+DisableExplicitGC−XX:+CMSParallelRemarkEnabled−XX:+UseCMSInitiatingOccupancyOnly−XX:CMSInitiatingOccupancyFraction=75−verbose:gc−Dio.netty.leakDetectionLevel=advanced−classpath"BASEDIR"/logs/javaheapdump.hprof−XX:+DisableExplicitGC−XX:+CMSParallelRemarkEnabled−XX:+UseCMSInitiatingOccupancyOnly−XX:CMSInitiatingOccupancyFraction=75−verbose:gc−Dio.netty.leakDetectionLevel=advanced−classpath"BASEDIR"/logs/java_heapdump.hprof -XX:+DisableExplicitGC -XX:+CMSParallelRemarkEnabled -XX:+ UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=75 -verbose:gc -Dio.netty.leakDetectionLevel=advanced -classpath "CLASSPATH" -Dapp.name="seata-server" -Dapp.pid="$$" -Dapp.repo="$REPO" -Dapp.home="$BASEDIR" -Dbasedir="$BASEDIR" io.seata.server.Server "$@"

关于本问题的更多回答可点击原文查看：https://developer.aliyun.com/ask/516727?spm=a2c6h.14164896.0.0.55552a4ebXrKVa

问题三：nacos集群，重启网络后程序报错

之前是正常的，使用了service network restart 命令重启网络后，程序会报错，如下：

Describe the bug [2021-09-09 17:14:16.734 PM] 172.22.1.135 cngc-cloud-application ERROR ,, com.alibaba.nacos.naming.beat.sender com.alibaba.nacos.client.naming [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"172.22.1.135","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8098,"scheduled":false,"serviceName":"DEFAULT_GROUP@@cngc-cloud-application","stopped":false,"weight":1.0} java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([nacos-headless:8848]) tried: failed to req API:nacos-headless:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.SocketTimeoutException: connect timed out at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464) at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309) at com.alibaba.nacos.client.naming.beat.BeatReactorBeatTask.run(BeatReactor.java:92)atjava.util.concurrent.ExecutorsBeatTask.run(BeatReactor.java:92)atjava.util.concurrent.ExecutorsBeatTask.run(BeatReactor.java:92) at java.util.concurrent.ExecutorsRunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.accessScheduledFutureTask.accessScheduledFutureTask.access201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) [2021-09-09 17:14:24.799 PM] 172.22.1.135 cngc-cloud-application WARN ,, com.alibaba.nacos.client.naming.updater com.alibaba.nacos.client.naming failed to request http://nacos-headless:8848/nacos/v1/ns/instance/list?healthyOnly=false&namespaceId=cngc-cloud-seata&clientIP=172.22.1.135&serviceName=SEATA_GROUP%40%40seata-server&udpPort=54328&encoding=UTF-8&clusters=default from 172.23.14.205 [2021-09-09 17:14:24.799 PM] 172.22.1.135 cngc-cloud-application ERROR ,, com.alibaba.nacos.client.naming.updater com.alibaba.nacos.client.naming [NA] failed to request java.net.SocketTimeoutException: connect timed out at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:607) 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.naming.net.HttpClient.request(HttpClient.java:89) at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410) at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451) at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) at com.alibaba.nacos.client.naming.net.NamingProxy.queryList(NamingProxy.java:297) at com.alibaba.nacos.client.naming.core.HostReactor.updateServiceNow(HostReactor.java:270) at com.alibaba.nacos.client.naming.core.HostReactorUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315) at java.util.concurrent.ExecutorsRunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.accessScheduledFutureTask.accessScheduledFutureTask.access201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) [2021-09-09 17:14:24.801 PM] 172.22.1.135 cngc-cloud-application ERROR ,, com.alibaba.nacos.client.naming.updater com.alibaba.nacos.client.naming request nacos-headless:8848 failed. com.alibaba.nacos.api.exception.NacosException: failed to req API:nacos-headless:8848/nacos/v1/ns/instance/list. code:500 msg: java.net.SocketTimeoutException: connect timed out at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424) at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451) at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) at com.alibaba.nacos.client.naming.net.NamingProxy.queryList(NamingProxy.java:297) at com.alibaba.nacos.client.naming.core.HostReactor.updateServiceNow(HostReactor.java:270) at com.alibaba.nacos.client.naming.core.HostReactorUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315) at java.util.concurrent.ExecutorsRunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.accessScheduledFutureTask.accessScheduledFutureTask.access201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) [2021-09-09 17:14:24.801 PM] 172.22.1.135 cngc-cloud-application ERROR ,, com.alibaba.nacos.client.naming.updater com.alibaba.nacos.client.naming [NA] failed to update serviceName: SEATA_GROUP@@seata-server java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/list after all servers([nacos-headless:8848]) tried: failed to req API:nacos-headless:8848/nacos/v1/ns/instance/list. code:500 msg: java.net.SocketTimeoutException: connect timed out at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464) at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) at com.alibaba.nacos.client.naming.net.NamingProxy.queryList(NamingProxy.java:297) at com.alibaba.nacos.client.naming.core.HostReactor.updateServiceNow(HostReactor.java:270) at com.alibaba.nacos.client.naming.core.HostReactorUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315) at java.util.concurrent.ExecutorsRunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.accessScheduledFutureTask.accessScheduledFutureTask.access201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) [2021-09-09 17:14:37.804 PM] 172.22.1.135 cngc-cloud-application WARN ,, com.alibaba.nacos.client.naming.updater com.alibaba.nacos.client.naming failed to request http://nacos-headless:8848/nacos/v1/ns/instance/list?healthyOnly=false&namespaceId=cngc-cloud-seata&clientIP=172.22.1.135&serviceName=SEATA_GROUP%40%40seata-server&udpPort=54328&encoding=UTF-8&clusters=default from 172.23.14.205 [2021-09-09 17:14:37.804 PM] 172.22.1.135 cngc-cloud-application ERROR ,, com.alibaba.nacos.client.naming.updater com.alibaba.nacos.client.naming [NA] failed to request java.net.SocketTimeoutException: connect timed out at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:607) 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.naming.net.HttpClient.request(HttpClient.java:89) at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410) at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451) at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) at com.alibaba.nacos.client.naming.net.NamingProxy.queryList(NamingProxy.java:297) at com.alibaba.nacos.client.naming.core.HostReactor.updateServiceNow(HostReactor.java:270) at com.alibaba.nacos.client.naming.core.HostReactorUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315) at java.util.concurrent.ExecutorsRunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.accessScheduledFutureTask.accessScheduledFutureTask.access201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) [2021-09-09 17:14:37.804 PM] 172.22.1.135 cngc-cloud-application ERROR ,, com.alibaba.nacos.client.naming.updater com.alibaba.nacos.client.naming request nacos-headless:8848 failed. com.alibaba.nacos.api.exception.NacosException: failed to req API:nacos-headless:8848/nacos/v1/ns/instance/list. code:500 msg: java.net.SocketTimeoutException: connect timed out at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424) at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451) at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) at com.alibaba.nacos.client.naming.net.NamingProxy.queryList(NamingProxy.java:297) at com.alibaba.nacos.client.naming.core.HostReactor.updateServiceNow(HostReactor.java:270) at com.alibaba.nacos.client.naming.core.HostReactorUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315) at java.util.concurrent.ExecutorsRunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.accessScheduledFutureTask.accessScheduledFutureTask.access201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) [2021-09-09 17:14:37.804 PM] 172.22.1.135 cngc-cloud-application ERROR ,, com.alibaba.nacos.client.naming.updater com.alibaba.nacos.client.naming [NA] failed to update serviceName: SEATA_GROUP@@seata-server java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/list after all servers([nacos-headless:8848]) tried: failed to req API:nacos-headless:8848/nacos/v1/ns/instance/list. code:500 msg: java.net.SocketTimeoutException: connect timed out at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464) at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) at com.alibaba.nacos.client.naming.net.NamingProxy.queryList(NamingProxy.java:297) at com.alibaba.nacos.client.naming.core.HostReactor.updateServiceNow(HostReactor.java:270) at com.alibaba.nacos.client.naming.core.HostReactorUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315)atjava.util.concurrent.ExecutorsUpdateTask.run(HostReactor.java:315) at java.util.concurrent.ExecutorsRunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.accessScheduledFutureTask.accessScheduledFutureTask.access201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)atjava.util.concurrent.ThreadPoolExecutorScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)

客户端：springCloud 2.X 服务端：1.4.2 接入方式：k8s-nacos，参考的官网k8s的方式安装

原提问者GitHub用户ai641843909

参考回答：

1.手动访问一下报错api看看是否报错

2.k8s集群中的应用有没有暴露在外部网络

3.查看该pod所在主机这个端口是否可以访问 curl -v http://$POD_IP:端口/ping 暴露服务的方式可参考 https://juejin.cn/post/6844903654391021581

原回答者GitHub用户li-xiao-shuang

关于本问题的更多回答可点击原文查看：https://developer.aliyun.com/ask/513245?spm=a2c6h.14164896.0.0.5bf82a4ebaJnK8

问题四：各位大侠好，今天我启动Nacos koa2做的后端api项目，出现的下面的报错，启动不了。

各位大侠好，今天我启动Nacos koa2做的后端api项目，出现的下面的报错，启动不了。我把报错信息复制后到google查找是什么问题？发现是nacos的问题： google查找后，有人也出现过一样的问题：https://github.com/nacos-group/nacos-sdk-nodejs/issues/90各位大哥大姐能帮忙看看吗？谢谢

参考回答：

根据报错信息，可能是Nacos客户端无法连接到服务器或服务器未响应，导致注册失败。建议检查客户端和服务器的配置，确保它们之间可以正常通信。同时，也可以尝试重启Nacos服务器或客户端来解决问题。

关于本问题的更多回答可点击原文查看：https://developer.aliyun.com/ask/514358?spm=a2c6h.14164896.0.0.5bf82a4ebaJnK8

问题五：Nacos本地启动服务和idea配置参数都是8848端口，但是idea启动项目的时候报错，怎么处理？

Nacos本地启动服务和idea配置参数都是8848端口，但是idea启动项目的时候报错，怎么处理？

    在Nacos我本地启动的服务和idea配置的参数都是8848端口，但是idea启动项目的时候 报错，这个是怎么回事呀？

参考回答：

根据您提供的截图信息，可以看出您的应用程序和 Nacos 服务都在本机（localhost）上运行，并且使用的都是 8848 端口。

根据报错信息，发现这是一个连接超时的错误，这可能是由于本地防火墙或其他网络问题引起的。

为了解决这个问题，您可以尝试以下几个步骤：

1. 检查本地防火墙设置，确保没有针对 8848 端口的入站或出站规则阻止了连接。如果有，请尝试更新防火墙规则以允许该端口的连接。
   
2. 检查网络连接设置，确保您的计算机可以与 Nacos 服务器正常通信。可以尝试 ping Nacos 服务器的 IP 地址或域名，确保可以正常连接。
   
3. 尝试使用 telnet 命令测试 8848 端口的连接。可以在终端中输入以下命令：

telnet localhost 8848

1. 如果能够连接成功，则说明端口没有被阻塞，应用程序应该可以正常连接 Nacos 服务。如果无法连接，请检查您的本地网络设置。
2. 在应用程序中尝试使用其他端口访问 Nacos 服务，看看是否可以正常连接。如果可以，可能是由于本地端口 8848 被占用或出现其他问题，请尝试更改端口并更新应用程序的配置文件。

关于本问题的更多回答可点击原文查看：

https://developer.aliyun.com/ask/516039?spm=a2c6h.13066369.question.50.3a844238BTfMv4