rokaye commented on issue #15641:
URL: https://github.com/apache/dubbo/issues/15641#issuecomment-3696322279
```markdown
# Environment and Dependencies
- **JDK**: 21
- **Dubbo**: 3.3.6
- **Spring Boot**: 3.5.8
### Maven Dependencies
```xml
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-zookeeper-curator5-spring-boot-starter</artifactId>
</dependency>
```
# Proto File with Different `package` and `java_package`
```proto
syntax = "proto3";
option java_multiple_files = false;
option java_package = "com.ec.mkt.common.grpc.server.tridemo";
package demo;
service DemoService {
rpc SayHello (HelloRequest) returns (HelloReply) {}
}
message HelloRequest {
string name = 1;
}
message HelloReply {
string message = 1;
}
```
## Compiled Code
```java
public interface DemoService extends org.apache.dubbo.rpc.model.DubboStub {
String JAVA_SERVICE_NAME =
"com.ec.mkt.common.grpc.server.tridemo.DemoService";
String SERVICE_NAME = "demo.DemoService";
com.ec.mkt.common.grpc.server.tridemo.Greeter.HelloReply
sayHello(com.ec.mkt.common.grpc.server.tridemo.Greeter.HelloRequest request);
CompletableFuture<com.ec.mkt.common.grpc.server.tridemo.Greeter.HelloReply>
sayHelloAsync(com.ec.mkt.common.grpc.server.tridemo.Greeter.HelloRequest
request);
}
```
## Debugging
```shell
grpcurl -plaintext \
-proto greeter.proto \
-d '{"name": "Dubbo Triple"}' \
10.0.108.20:19132 \
demo.DemoService/SayHello
```
**ERROR**:
- Code: Unimplemented
- Message: Invoker for gRPC not found
```shell
grpcurl -plaintext \
-proto greeter.proto \
-d '{"name": "Dubbo Triple"}' \
10.0.108.20:19132 \
com.ec.mkt.common.grpc.server.tridemo.DemoService:1.0.0/SayHello
```
**Error**:
- Error invoking method
"com.ec.mkt.common.grpc.server.tridemo.DemoService:1.0.0/SayHello": target
server does not expose service
"com.ec.mkt.common.grpc.server.tridemo.DemoService:1.0.0"
---
# Proto File with Same `package` and `java_package`
```proto
syntax = "proto3";
option java_multiple_files = false;
option java_package = "com.ec.mkt.common.grpc.server.tridemo";
package com.ec.mkt.common.grpc.server.tridemo;
service DemoService {
rpc SayHello (HelloRequest) returns (HelloReply) {}
}
message HelloRequest {
string name = 1;
}
message HelloReply {
string message = 1;
}
```
## Compiled Code
```java
public interface DemoService extends org.apache.dubbo.rpc.model.DubboStub {
String JAVA_SERVICE_NAME =
"com.ec.mkt.common.grpc.server.tridemo.DemoService";
String SERVICE_NAME =
"com.ec.mkt.common.grpc.server.tridemo.DemoService";
com.ec.mkt.common.grpc.server.tridemo.Greeter.HelloReply
sayHello(com.ec.mkt.common.grpc.server.tridemo.Greeter.HelloRequest request);
CompletableFuture<com.ec.mkt.common.grpc.server.tridemo.Greeter.HelloReply>
sayHelloAsync(com.ec.mkt.common.grpc.server.tridemo.Greeter.HelloRequest
request);
}
```
## Debugging
```shell
grpcurl -plaintext \
-proto greeter.proto \
-d '{"name": "Dubbo Triple"}' \
10.0.108.20:19132 \
demo.DemoService/SayHello
```
**Error**:
- Error invoking method "demo.DemoService/SayHello": target server does not
expose service "demo.DemoService"
```shell
grpcurl -plaintext \
-proto greeter.proto \
-d '{"name": "Dubbo Triple"}' \
10.0.108.20:19132 \
com.ec.mkt.common.grpc.server.tridemo.DemoService/SayHello
```
**Response**:
```json
{
"message": "Hello, Dubbo Triple!"
}
```
## Conclusion
It seems necessary for the `package` in the proto file to match the
`java_package` for successful service exposure and invocation.
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