nacos作服务注册中心时某种情况下spring cloud gateway无法注册进入nacos server

[hzwei206]

我遇到一个奇葩现象，不知道是什么原因，特来请教：

使用nacos作服务发现。

当nacos里server list有微服务时，启动spring cloud gateway无法注册进入nacos server，并且启动过程卡住了无法启动完成，在nacos里没有gateway服务，观察spring cloud gateway启动日志也无错误，还正常向nacos拉取了微服务server list。

23-03-17 18:25:10.276 [com.alibaba.nacos.naming.failover] DEBUG failover switch is not found, failover00-00---000-VIPSRV_FAILOVER_SWITCH-000---00-00 (c.a.n.c.n.b.FailoverReactor$SwitchRefresher.run[line:147])  

23-03-17 18:25:15.277 [com.alibaba.nacos.naming.failover] DEBUG failover switch is not found, failover00-00---000-VIPSRV_FAILOVER_SWITCH-000---00-00 (c.a.n.c.n.b.FailoverReactor$SwitchRefresher.run[line:147])  

23-03-17 18:25:16.685 [com.alibaba.nacos.client.naming.updater] DEBUG HTTP method: GET, url: http://192.168.1.36:8848/nacos/v1/ns/instance/list?app=unknown&healthyOnly=false&namespaceId=public&clientIP=127.0.0.1&serviceName=DEFAULT_GROUP%40%40one-server&udpPort=37923&accessToken=eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJuYWNvcyIsImV4cCI6MTY3OTA2NTE2NX0.adyHWCSc4FOnsGv4hMDbToYA6RtF3rQpWD5KyYdrm54&clusters=, body: {} (c.a.n.c.h.c.NacosRestTemplate.execute[line:476])  

23-03-17 18:25:16.685 [com.alibaba.nacos.client.naming.updater] DEBUG HTTP method: GET, url: http://192.168.1.36:8848/nacos/v1/ns/instance/list?app=unknown&healthyOnly=false&namespaceId=public&clientIP=127.0.0.1&serviceName=DEFAULT_GROUP%40%40another-server&udpPort=37923&accessToken=eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJuYWNvcyIsImV4cCI6MTY3OTA2NTE2NX0.adyHWCSc4FOnsGv4hMDbToYA6RtF3rQpWD5KyYdrm54&clusters=, body: {} (c.a.n.c.h.c.NacosRestTemplate.execute[line:476])  

23-03-17 18:25:20.277 [com.alibaba.nacos.naming.failover] DEBUG failover switch is not found, failover00-00---000-VIPSRV_FAILOVER_SWITCH-000---00-00 (c.a.n.c.n.b.FailoverReactor$SwitchRefresher.run[line:147])

当把nacos里的微服务都停掉后，nacos里没有微服务时，再启动spring cloud gateway就能注册进入nacos里，在nacos里能看到gateway服务，spring cloud gateway也正常启动成功，然后再启动其他微服务，一切正常。

nacos版本2.2.0.1
spring cloud版本2021.0.5
spring boot版本2.6.13
spring-cloud-starter-alibaba-nacos-discovery版本2021.1

[steverao]

Please refer to the document to set the component's dependencies version firstly.

[hzwei206]

Please refer to the document to set the component's dependencies version firstly.

也就是说我用的pring cloud 2021.0.5，只能用spring-cloud-starter-alibaba-nacos-discovery版本2021.0.4.0*，nacos版本2.0.4，对吧

[hzwei206]

Please refer to the document to set the component's dependencies version firstly.

不像是版本问题。换了版本测试：
nacos版本2.0.4
spring cloud版本2021.0.5 或 2021.0.4
spring boot版本由cloud版本依赖确定
spring-cloud-starter-alibaba-nacos-discovery版本2021.0.4.0

当nacos里有微服务时，启动gateway，无法启动完成（卡住了），且没有注册进nacos里
不知道是哪里的配置不对？

[hzwei206]

临时解决办法：
参见 gh-2574

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[humaolin]

排查是否缺少loaderbanlance