btpka3 opened a new issue, #15320:
URL: https://github.com/apache/dubbo/issues/15320

   ### 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 feature requirement.
   
   
   ### Apache Dubbo Component
   
   Java SDK (apache/dubbo)
   
   ### Descriptions
   
   dubbo  java client version : 3.3.3
   dubbo configuration key  "dubbo.rpc.tri.resolve-fallback-to-default" to false
   I'm using triple protocol to  send  http request  with service group and 
version info .
   
   ```shell
   curl -s -XPOST "http://localhost:50051/com.my.Service/request"; \
   -H "Content-Type: application/json" \
   -H "rest-service-group: DUBBO" \
   -H "rest-service-version: 1.0.0" \
   -d '["firstStringParam",{"k1":"v1","k2":"v2"}]' | jq
   ````
   and found it required to specify environment  
`DUBBO_RPC_TRI_RESOLVE-FALLBACK-TO-DEFAULT` to `false`  to work, or else the 
http header "rest-service-group",  "rest-service-version" has no effect. 
   
   but  hyphen is not a valid shell identifier. 
   ```shell
   $ export DUBBO_RPC_TRI_RESOLVE-FALLBACK-TO-DEFAULT=flase
   -bash: export: `DUBBO_RPC_TRI_RESOLVE-FALLBACK-TO-DEFAULT=flase': not a 
valid identifier
   ```
   Some k8s service (such as Aliyun EDAS can set such env key), some others 
can't.
   
   Request : please support  allow specify such dubbo configuration keys from  
dubbo.properties  and  enviroment keys , add explain it in dubbo reference .
   
   
   
   links : 
     
   - 
org.apache.dubbo.rpc.protocol.tri.TripleProtocol#[RESOLVE_FALLBACK_TO_DEFAULT](https://github.com/apache/dubbo/blob/dubbo-3.3.3/dubbo-rpc/dubbo-rpc-triple/src/main/java/org/apache/dubbo/rpc/protocol/tri/TripleProtocol.java#L84C9-L84C36)
   - 
org.apache.dubbo.common.config.EnvironmentConfiguration#[getInternalProperty](https://github.com/apache/dubbo/blob/dubbo-3.3.3/dubbo-common/src/main/java/org/apache/dubbo/common/config/EnvironmentConfiguration.java#L29C19-L29C38)
   - spring boot : [Binding Maps From Environment 
Variables](https://docs.spring.io/spring-boot/reference/features/external-config.html#features.external-config.typesafe-configuration-properties.relaxed-binding.environment-variables)
   - spring boot :  
org.springframework.core.env.SystemEnvironmentPropertySource#[checkPropertyName](https://github.com/spring-projects/spring-framework/blob/v6.2.5/spring-core/src/main/java/org/springframework/core/env/SystemEnvironmentPropertySource.java#L124)
   
   
   
   
   ### Related issues
   
   _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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