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Posted to notifications@dubbo.apache.org by GitBox <gi...@apache.org> on 2022/07/11 06:07:43 UTC
[GitHub] [dubbo] zyxdSTU opened a new issue, #10300: provider提供hessian协议服务，consumer订阅该服务的时候，报错。
zyxdSTU opened a new issue, #10300:
URL: https://github.com/apache/dubbo/issues/10300
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### Environment
* Dubbo version: 3.0.9
* Operating System version: centos
* Java version: 1.8
* dubbo-rpc-hessian: 2.7.15
### Steps to reproduce this issue
1. provider注册，hessian协议服务
2. consumer订阅provider提供的hessian协议服务
3. 报错``Failed to refer invoker for interface:interface org.zjvis.datacenter.service.asset.DownloadAssetService``
### Expected Behavior
<!-- What do you expect from the above steps？-->
正常订阅hessian协议服务
### Actual Behavior
<!-- What actually happens? -->
服务端抛出异常
```
6370 [main] ERROR org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory - [DUBBO] Failed to refer invoker for interface:interface org.zjvis.datacenter.service.asset.DownloadAssetService,url:(DefaultServiceInstance{serviceName='datacenter-api-local-asda', host='10.11.33.60', port=20882, enabled=true, healthy=true, metadata={dubbo.metadata-service.url-params={"connections":"1","version":"1.0.0","dubbo":"2.0.2","release":"3.0.9","side":"provider","port":"20881","protocol":"dubbo"}, dubbo.endpoints=[{"port":20882,"protocol":"hessian"},{"port":20881,"protocol":"dubbo"}], dubbo.metadata.revision=ccd36a9506fdfe3585952f41f48bc66b, dubbo.metadata.storage-type=local, timestamp=1657502667429}}, service{name='org.zjvis.datacenter.service.asset.DownloadAssetService',group='null',version='null',protocol='hessian',params={side=provider, metrics.protocol=dubbo, release=3.0.9, methods=downloadDataPattern, logger=slf4j, deprecated=false, dubbo=2.0.2, interface=org.zjvis.datacenter.se
rvice.asset.DownloadAssetService, service-name-mapping=true, timeout=10000000, generic=false, metrics.port=20881, application=datacenter-api-local-asda, payload=104857600, hessian.overload.method=true, background=false, dynamic=true, service.filter=metrics, anyhost=true},})null, dubbo version: 3.0.9, current host: 10.11.33.60
java.lang.NullPointerException
at org.apache.dubbo.common.URL.setProtocol(URL.java:347)
at org.apache.dubbo.rpc.protocol.hessian.HessianProtocol.doRefer(HessianProtocol.java:136)
at org.apache.dubbo.rpc.protocol.AbstractProxyProtocol.protocolBindingRefer(AbstractProxyProtocol.java:109)
at org.apache.dubbo.rpc.protocol.AbstractProtocol.refer(AbstractProtocol.java:133)
at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:77)
at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:85)
at org.apache.dubbo.rpc.cluster.filter.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:74)
at org.apache.dubbo.rpc.protocol.ProtocolSerializationWrapper.refer(ProtocolSerializationWrapper.java:52)
at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
at org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory.toInvokers(ServiceDiscoveryRegistryDirectory.java:294)
at org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory.refreshInvoker(ServiceDiscoveryRegistryDirectory.java:225)
at org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory.refreshOverrideAndInvoker(ServiceDiscoveryRegistryDirectory.java:153)
at org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory.notify(ServiceDiscoveryRegistryDirectory.java:147)
at org.apache.dubbo.registry.client.event.listener.ServiceInstancesChangedListener.addListenerAndNotify(ServiceInstancesChangedListener.java:231)
at org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.subscribeURLs(ServiceDiscoveryRegistry.java:321)
at org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.doSubscribe(ServiceDiscoveryRegistry.java:216)
at org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.subscribe(ServiceDiscoveryRegistry.java:184)
at org.apache.dubbo.registry.ListenerRegistryWrapper.subscribe(ListenerRegistryWrapper.java:111)
at org.apache.dubbo.registry.integration.DynamicDirectory.subscribe(DynamicDirectory.java:180)
at org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory.subscribe(ServiceDiscoveryRegistryDirectory.java:107)
at org.apache.dubbo.registry.integration.RegistryProtocol.doCreateInvoker(RegistryProtocol.java:570)
at org.apache.dubbo.registry.integration.InterfaceCompatibleRegistryProtocol.getServiceDiscoveryInvoker(InterfaceCompatibleRegistryProtocol.java:65)
at org.apache.dubbo.registry.client.migration.MigrationInvoker.refreshServiceDiscoveryInvoker(MigrationInvoker.java:436)
at org.apache.dubbo.registry.client.migration.MigrationInvoker.migrateToApplicationFirstInvoker(MigrationInvoker.java:244)
at org.apache.dubbo.registry.client.migration.MigrationRuleHandler.refreshInvoker(MigrationRuleHandler.java:73)
at org.apache.dubbo.registry.client.migration.MigrationRuleHandler.doMigrate(MigrationRuleHandler.java:57)
at org.apache.dubbo.registry.client.migration.MigrationRuleListener.onRefer(MigrationRuleListener.java:243)
at org.apache.dubbo.registry.integration.RegistryProtocol.interceptInvoker(RegistryProtocol.java:535)
at org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:505)
at org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:487)
at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:74)
at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:83)
at org.apache.dubbo.rpc.cluster.filter.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:71)
at org.apache.dubbo.rpc.protocol.ProtocolSerializationWrapper.refer(ProtocolSerializationWrapper.java:52)
at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
at org.apache.dubbo.config.ReferenceConfig.createInvokerForRemote(ReferenceConfig.java:494)
at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:397)
at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:285)
at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:219)
at org.apache.dubbo.config.utils.SimpleReferenceCache.get(SimpleReferenceCache.java:129)
at org.apache.dubbo.config.deploy.DefaultModuleDeployer.lambda$referServices$6(DefaultModuleDeployer.java:387)
at java.util.concurrent.ConcurrentHashMap$ValuesView.forEach(ConcurrentHashMap.java:4707)
at org.apache.dubbo.config.deploy.DefaultModuleDeployer.referServices(DefaultModuleDeployer.java:367)
at org.apache.dubbo.config.deploy.DefaultModuleDeployer.start(DefaultModuleDeployer.java:154)
at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onContextRefreshedEvent(DubboDeployApplicationListener.java:111)
at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:100)
at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:45)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:403)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:360)
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:897)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:162)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
at org.zjvis.datascience.web.DataScienceWebMain.main(DataScienceWebMain.java:54)
```
### 个人分析
HessianProtocol.doRefer方法中会调用
```
return (T) hessianProxyFactory.create(serviceType, url.setProtocol("http").toJavaURL(), Thread.currentThread().getContextClassLoader())
```
**其中url.setProtocol("http").toJavaURL()会报NPE错误
主要是因为，url是InstanceAddressUrl的实例, 其urlAddress变量为空， 而url.setProtocol会引用urlAddress变量**
### 卡很久了，有没有大佬来解决一下这个问题。
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[GitHub] [dubbo] zyxdSTU commented on issue #10300: provider提供hessian协议服务，consumer订阅该服务的时候，报错。
Posted by GitBox <gi...@apache.org>.
zyxdSTU commented on issue #10300:
URL: https://github.com/apache/dubbo/issues/10300#issuecomment-1181760207
> 1. 可以强制走接口级先饶过
> 2. setProtocol 方法会在 [Fix wildcard match #10256](https://github.com/apache/dubbo/pull/10256) 中修复
> 3. hessian 协议兼容版 jar 会在[Add rpc and serialization implmentations dubbo-spi-extensions#125](https://github.com/apache/dubbo-spi-extensions/pull/125) 中提供
目前强制走接口级别，会出现consumer 订阅不了hessian协议服务的问题。所以还是等修复把。
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[GitHub] [dubbo] chickenlj commented on issue #10300: provider提供hessian协议服务，consumer订阅该服务的时候，报错。
Posted by GitBox <gi...@apache.org>.
chickenlj commented on issue #10300:
URL: https://github.com/apache/dubbo/issues/10300#issuecomment-1235013689
Has been fixed in the latest 3.0.11 release.
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[GitHub] [dubbo] AlbumenJ commented on issue #10300: provider提供hessian协议服务，consumer订阅该服务的时候，报错。
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10300:
URL: https://github.com/apache/dubbo/issues/10300#issuecomment-1181271101
1. 可以强制走接口级先饶过
2. setProtocol 方法会在 https://github.com/apache/dubbo/pull/10256 中修复
3. hessian 协议兼容版 jar 会在https://github.com/apache/dubbo-spi-extensions/pull/125 中提供
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[GitHub] [dubbo] CrazyHZM commented on issue #10300: provider提供hessian协议服务，consumer订阅该服务的时候，报错。
Posted by GitBox <gi...@apache.org>.
CrazyHZM commented on issue #10300:
URL: https://github.com/apache/dubbo/issues/10300#issuecomment-1185215320
@zyxdSTU 都已经合并，验证一下是否还有这个问题。
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[GitHub] [dubbo] haoyann commented on issue #10300: provider提供hessian协议服务，consumer订阅该服务的时候，报错。
Posted by GitBox <gi...@apache.org>.
haoyann commented on issue #10300:
URL: https://github.com/apache/dubbo/issues/10300#issuecomment-1181266421
这个项目看起来是 `3.0.0` 的应用级的服务发现与 `2.7.x` 版本的协议结合使用。 `InstanceAddressUrl#setProtocol ` 确实会抛出空指针异常。
有两个方法可以解决一下你的问题：
1. InstanceAddressUrl 重写 `URL#setProtocol` 方法，支持可以修改 `protocol` 属性。
2. `url.setProtocol("http").toJavaURL()` 这部分可以手动拼接一个 `http` 协议的 `java.net.URL`。
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[GitHub] [dubbo] chickenlj closed issue #10300: provider提供hessian协议服务，consumer订阅该服务的时候，报错。
Posted by GitBox <gi...@apache.org>.
chickenlj closed issue #10300: provider提供hessian协议服务，consumer订阅该服务的时候，报错。
URL: https://github.com/apache/dubbo/issues/10300
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