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Posted to notifications@dubbo.apache.org by "Skylm808 (via GitHub)" <gi...@apache.org> on 2026/04/25 01:47:55 UTC
[I] generic 样例中 Java client -> Go server 失败 [dubbo-go-samples]
Skylm808 opened a new issue, #1073:
URL: https://github.com/apache/dubbo-go-samples/issues/1073
# generic 样例中 Java client -> Go server 失败，而 Go->Go / Go->Java 正常
## 问题描述
在 `dubbo-go-samples/generic` 中，按当前 README 的官方方式测试时：
- `Go client -> Go server` 可以正常通过
- `Go client -> Java server` 可以正常通过
- 但 `Java client -> Go server` 失败
因此 `generic` 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
## 复现步骤
### 1. 启动 Go server
```bash
cd generic/go-server/cmd
go run .
```
### 2. 验证 Go client -> Go server
```bash
cd generic/go-client/cmd
go run .
```
结果：
```text
All generic call tests passed
```
### 3. 验证 Java client -> Go server
```bash
cd generic/java-client
mvn clean compile exec:java -Dexec.mainClass="org.apache.dubbo.samples.ApiTripleConsumer"
```
## 实际结果
Java client 调 Go server 失败，关键表现为：
```text
[FAIL] GetUser1(String): DEADLINE_EXCEEDED
[FAIL] GetUser2(String, String): DEADLINE_EXCEEDED
[FAIL] GetUser3(int): DEADLINE_EXCEEDED
[FAIL] GetUser4(int, String): DEADLINE_EXCEEDED
[FAIL] GetOneUser(): DEADLINE_EXCEEDED
[FAIL] GetUsers(String[]): DEADLINE_EXCEEDED
[FAIL] GetUsersMap(String[]): DEADLINE_EXCEEDED
[FAIL] QueryAll(): DEADLINE_EXCEEDED
[FAIL] QueryUser(User): DEADLINE_EXCEEDED
[FAIL] QueryUsers(User[]): DEADLINE_EXCEEDED
```
在较新的 JDK 下，还会先看到 Java 侧异常：
```text
java.lang.reflect.InaccessibleObjectException
```
或：
```text
WARNING: Illegal reflective access by ... hessian-lite ...
```
## 预期结果
按 README 的说明，`generic` 样例中的 Go/Java 泛化调用都应能正常完成，不应只通过 `Go -> Go` 和 `Go -> Java`。
## 补充说明
### Go -> Java 正常
启动 Java server 后：
```bash
cd generic/java-server
mvn clean compile exec:java -Dexec.mainClass="org.apache.dubbo.samples.ApiProvider"
```
再运行：
```bash
cd generic/go-client/cmd
go run .
```
结果仍然是：
```text
All generic call tests passed
```
说明：
- Go client -> Java server 是正常的
### 当前现象更像是定向问题
当前只在 `Java client -> Go server` 这条链路上稳定失败。
## 建议排查方向
- Java generic client 与 Go generic server 的兼容性
- Hessian2 / generic invocation 在 Java -> Go 路径上的序列化与解码
- `User` 结构中 `time.Time` 等字段的跨语言兼容性
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Re: [I] generic 样例中 Java client -> Go server 失败 [dubbo-go-samples]
Posted by "ywxzm03 (via GitHub)" <gi...@apache.org>.
ywxzm03 commented on issue #1073:
URL: https://github.com/apache/dubbo-go-samples/issues/1073#issuecomment-4322103326
please assign to me
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Re: [I] generic 样例中 Java client -> Go server 失败 [dubbo-go-samples]
Posted by "ywxzm03 (via GitHub)" <gi...@apache.org>.
ywxzm03 commented on issue #1073:
URL: https://github.com/apache/dubbo-go-samples/issues/1073#issuecomment-4390667664
## 结论
我这边重新排查后，当前判断该问题与 VPN / 隧道网卡影响 Dubbo Java 本机地址选择有关，不是 Java generic -> Go generic 的兼容性等问题
## 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
## 复现现象
开启 VPN 时，Java client -> Go server 失败：
```text
Passed: 0, Failed: 10, Total: 10
```
Dubbo Java 日志中 `current host` 为 VPN/隧道网卡地址：
```text
current host: 198.18.0.1
```
Netty 连接日志中实际远端地址也异常：
```text
R:/198.18.0.1:50052
```
但 Java client 配置的直连地址是：
```text
tri://127.0.0.1:50052
```
此时 Go server 侧没有进入 provider 方法的业务日志。
## 验证结果
关闭 VPN 后，未修改 Java client、Go server、接口定义、`User` 结构和启动参数，Java client -> Go server 可以正常通过：
```text
current host: 10.134.92.16
```
```text
Passed: 10, Failed: 0, Total: 10
```
开启 VPN 时，如果显式忽略 macOS `utun` 网卡，也可以通过以下方法进行规避：
```bash
MAVEN_OPTS="-Ddubbo.network.interface.ignored=utun.*" \
mvn clean compile exec:java -Dexec.mainClass="org.apache.dubbo.samples.ApiTripleConsumer"
```
Windows 下如果存在 WSL / Hyper-V / Docker / VPN / Wintun / TAP / vEthernet 等虚拟网卡，也可以通过以下方法进行规避：
```text
dubbo.network.interface.ignored
dubbo.network.interface.preferred
```
## 对建议排查方向的结论
- Java generic client 与 Go generic server 在当前 sample 覆盖的调用场景下可以互通
- Hessian / generic invocation 编解码链路可以正常工作
- `User.time.Time` 仍是跨语言样例中的潜在风险点，但不是本次 `DEADLINE_EXCEEDED` 的直接原因
- JDK 17+ 下的 `InaccessibleObjectException` 属于 hessian-lite 反射访问噪音，不是主因
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Re: [I] generic 样例中 Java client -> Go server 失败 [dubbo-go-samples]
Posted by "CAICAIIs (via GitHub)" <gi...@apache.org>.
CAICAIIs commented on issue #1073:
URL: https://github.com/apache/dubbo-go-samples/issues/1073#issuecomment-4322061906
@maizhiqiang
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Re: [I] generic 样例中 Java client -> Go server 失败 [dubbo-go-samples]
Posted by "Skylm808 (via GitHub)" <gi...@apache.org>.
Skylm808 commented on issue #1073:
URL: https://github.com/apache/dubbo-go-samples/issues/1073#issuecomment-4415489583
收到，确认了，问题更像是 VPN影响 Dubbo Java 选本机地址，不是 generic 本身有问题。
我这边现象和你说的一致：开 VPN 会超时，关掉后恢复正常。感谢定位。
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Re: [I] generic 样例中 Java client -> Go server 失败 [dubbo-go-samples]
Posted by "Alanxtl (via GitHub)" <gi...@apache.org>.
Alanxtl closed issue #1073: generic 样例中 Java client -> Go server 失败
URL: https://github.com/apache/dubbo-go-samples/issues/1073
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