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Posted to notifications@dubbo.apache.org by "goto456 (via GitHub)" <gi...@apache.org> on 2025/08/07 06:53:15 UTC
[I] [Bug] Use Nacos as registry center, every diffrent registry.group eatablished it's own NamingService connection, that causes too many connections to be established [dubbo]
goto456 opened a new issue, #15624:
URL: https://github.com/apache/dubbo/issues/15624
### Pre-check
- [x] I am sure that all the content I provide is in English.
### Search before asking
- [x] I had searched in the [issues](https://github.com/apache/dubbo/issues?q=is%3Aissue) and found no similar issues.
### Apache Dubbo Component
Java SDK (apache/dubbo)
### Dubbo Version
Dubbo Java 3.2.13, JDK 8, Mac OS/Linux
### Steps to reproduce this issue
In one Dubbo project use Nacos as registry center, there are several interfaces, and set different `registry.group` for each interface, that will established one connection to Nacos for each interface(registry.group), so it causes too many connections to be established.
I check the code in class `org.apache.dubbo.registry.nacos.NacosRegistryFactory`, in the method `createRegistry` will create a `NamingService` every time.
***Is it neccessary to create a new `NamingService` every time for each different `registry.group` ?***
some related code:
<img width="959" height="827" alt="Image" src="https://github.com/user-attachments/assets/4327cc98-b40c-4d34-8a70-7681109bcb95" />
<img width="1146" height="661" alt="Image" src="https://github.com/user-attachments/assets/99afa722-4a87-44da-84bf-fd221a98d15c" />
<img width="1211" height="706" alt="Image" src="https://github.com/user-attachments/assets/0655e8eb-bcd6-41cd-b7f6-04c42a13b93a" />
### What you expected to happen
Establish only one NamingService Connection for each `Nacos Host`，not for each `registry.group`
### Anything else
_No response_
### Are you willing to submit a pull request to fix on your own?
- [x] Yes I am willing to submit a pull request on my own!
### Code of Conduct
- [x] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)
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Re: [I] [Bug] Use Nacos as registry center, every diffrent registry.group eatablished it's own NamingService connection, that causes too many connections to be established [dubbo]
Posted by "goto456 (via GitHub)" <gi...@apache.org>.
goto456 commented on issue #15624:
URL: https://github.com/apache/dubbo/issues/15624#issuecomment-3177778297
> how many groups do you have? how much less will the connections number be if share connection between different registry groups?
There are 100+ groups in each consumer service. If it shares connection between different registry groups, it will decrease many connections.
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Re: [I] [Bug] Use Nacos as registry center, every diffrent registry.group eatablished it's own NamingService connection, that causes too many connections to be established [dubbo]
Posted by "goto456 (via GitHub)" <gi...@apache.org>.
goto456 commented on issue #15624:
URL: https://github.com/apache/dubbo/issues/15624#issuecomment-3167523937
> what's your dubbo.registry.register-mode? if you choose dubbo3 + nacos2.x, you'd better only use instance mode, or use zk as your registry center if you keep using interface mode.
I used `instance` mode, dubbo 3.2.13 + nacos 2.1.0
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Re: [I] [Bug] Use Nacos as registry center, every diffrent registry.group eatablished it's own NamingService connection, that causes too many connections to be established [dubbo]
Posted by "zrlw (via GitHub)" <gi...@apache.org>.
zrlw commented on issue #15624:
URL: https://github.com/apache/dubbo/issues/15624#issuecomment-3169614494
how many groups do you have? how much less will the connections number be if share connection between different registry groups?
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Re: [I] [Bug] Use Nacos as registry center, every diffrent registry.group eatablished it's own NamingService connection, that causes too many connections to be established [dubbo]
Posted by "RainYuY (via GitHub)" <gi...@apache.org>.
RainYuY commented on issue #15624:
URL: https://github.com/apache/dubbo/issues/15624#issuecomment-3695341659
> > how many groups do you have? how much less will the connections number be if share connection between different registry groups?
>
> There are 100+ groups in each consumer service. If it shares connection between different registry groups, it will decrease many connections.
Could you provide me with the details of your scenarios? I don’t understand why the scenarios require configuring so many different groups for registry.
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Re: [I] [Bug] Use Nacos as registry center, every diffrent registry.group eatablished it's own NamingService connection, that causes too many connections to be established [dubbo]
Posted by "zrlw (via GitHub)" <gi...@apache.org>.
zrlw commented on issue #15624:
URL: https://github.com/apache/dubbo/issues/15624#issuecomment-3163338139
what's your dubbo.registry.register-mode?
if you choose dubbo3 + nacos2.x, you'd better use instance mode, or use zk as your registry center if you keep using interface mode.
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