Skylm808 opened a new issue, #1074:
URL: https://github.com/apache/dubbo-go-samples/issues/1074
# java_interop 样例中 Java -> Go 在多个子场景下失败或不完整
## 问题描述
在 `dubbo-go-samples/java_interop` 中，按 samples 官方集成测试方式执行时：
```bash
./integrate_test.sh <sample-path>
```
当前观察到：
- 多个直连类子样例中，`Go client -> Go server` 正常
- 但 `Java client -> Go server` 失败
- 两个 service discovery 子样例中，`Java client -> Go server` 已经能成功拿到返回值
- 但 Java 进程收尾和 Java server 阶段仍然有异常
因此 `java_interop` 当前不能记为整体通过。
## 测试环境
- `dubbo-go-samples` 的 Go 依赖通过 `go.mod replace` 指向本地 `dubbo-go-3.3.2`
- Java 环境：JDK 17
## 复现方式
### 1. 直连类样例
```bash
./integrate_test.sh java_interop/non-protobuf-dubbo
./integrate_test.sh java_interop/non-protobuf-triple
./integrate_test.sh java_interop/protobuf-triple
```
### 2. service discovery 类样例
```bash
./integrate_test.sh java_interop/service_discovery/interface
./integrate_test.sh java_interop/service_discovery/service
```
## 实际结果
### 1. non-protobuf-dubbo
- `Go client -> Go server`：成功
- `Java client -> Go server`：失败
关键错误：
```text
No provider available for the service
org.apache.dubbo.hessian2.api.GreetingsService
```
### 2. non-protobuf-triple
- `Go client -> Go server`：成功
- `Java client -> Go server`：失败
关键错误：
```text
Failed to invoke the method greet
Timeout after 3000ms waiting for result
```
### 3. protobuf-triple
- `Go client -> Go server`：成功
- `Java client -> Go server`：失败
关键错误：
```text
Failed to invoke the method SayHello
Invoke remote method timeout
```
或：
```text
UNAVAILABLE : upstream localhost:20000 is unavailable
```
### 4. service_discovery/interface
- `Go client -> Go server`：成功
- `Java client -> Go server`：成功，返回：
```text
Greeting:Mamba!!!!!!!!!!!!
```
但随后出现：
```text
java.lang.NoClassDefFoundError:
org/apache/logging/log4j/core/async/DiscardingAsyncQueueFullPolicy
```
并且：
```text
Java server is running but not ready on 127.0.0.1:20000 after 60s
Java server phase skipped
```
### 5. service_discovery/service
- `Go client -> Go server`：成功
- `Java client -> Go server`：成功，返回：
```text
Greeting:Mamba!!!!!!!!!!!!
```
但随后出现：
```text
java.lang.NoClassDefFoundError:
org/apache/logging/log4j/core/async/DiscardingAsyncQueueFullPolicy
```
并且：
```text
Java server is running but not ready on 127.0.0.1:20000 after 60s
Java server phase skipped
```
## 预期结果
这些 `java_interop` 子样例按官方脚本执行时，Go 和 Java 的互通都应能完整通过，不应出现：
- `Java -> Go` 超时 / provider unavailable
- Java 进程收尾异常
- Java server 阶段未 ready 被跳过
## 当前现象总结
- 直连类样例：
- `Java -> Go` 失败
- service discovery 类样例：
- `Java -> Go` 已经能返回结果
- 但 Java 进程和 Java server 阶段仍不完整
## 建议排查方向
- Java client 与 Go server 在不同协议/序列化模式下的兼容性
- 旧版或 beta 版 dubbo-java 依赖在这些样例中的影响
- service discovery 样例中 Java 侧日志依赖与 server readiness 问题
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