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Posted to notifications@dubbo.apache.org by GitBox <gi...@apache.org> on 2022/05/16 17:46:02 UTC
[GitHub] [dubbo] saleson opened a new issue, #10046: Provider Url 中除了IP和端口相同，其它信息都不同时，Consumer中Channel绑定的仍是旧的Provider Url 信息
saleson opened a new issue, #10046:
URL: https://github.com/apache/dubbo/issues/10046
线上环境：
consumer 报错：“Data length too large：xxx” ， 但是打印的url是Service App1, 但是查出来的ip却是Service App2, 而且确实也是Service App2 的某个接口返回的数据量过大，但是Service App2有设置合理的payload， 可是consumer却没有读到到，而是使用了默认的8M, 最终报错。后来跟踪代码发现是consumer中本来该是对应Service App2的Channel， 其绑定的url却是Service App1的信息。后面进一步分析终于找到复现过程：由于ip池的原因，Service App1 发布时，ip被回收，Service App2 发布时， 从ip池获取到了之前Serice app1使用过的ip-a， consumer在这个时间段内没有发布没有重启，当使用ip-a的Service App2实例启动完成后， DubboProtocol.getSharedClient()方法获取到的仍是对应的Service App1的Channel对象。
### Environment
* Dubbo version: 3.0.5
* Java version: 1.8
### Steps to reproduce this issue
1. 启动provider ，payload 设置为100
2. 启动consumer， 调用provider一次
3. 修改provider payload阀值，设为8M, 重启
4. consumer 再次调用provider
Pls. provide [GitHub address] to reproduce this issue.
### Expected Behavior
consumer第一次调用报“Data length too large：xxx”
修改provider payload重启后，consumer调用正常完成
### Actual Behavior
consumer第一次调用报“Data length too large：xxx”
修改provider payload重启后，consumer仍是调用失败，报“Data length too large：xxx”
跟踪代码发现原来是ReferenceCountExchangeClient的close()方法在执行完被代理的Client.close()方法后，将实例变理client设置为LazyConnectExchangeClient， 该对象在后续被调用时会重新创建ExchangeClient对象； 且DubboProtocol中的referenceClientMap(用于缓存client)实例变量也没有删除掉ReferenceCountExchangeClient对象，而referenceClientMap缓存使用的key是ip:port, 后续有使用这个ip+port的实例启时后被consumer发现后，也不会更新ReferenceCountExchangeClient对象以及其一系列的Client中的url信息，仍是直接返回该ReferenceCountExchangeClient对象供新的DubboInvoker使用。
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[GitHub] [dubbo] chickenlj commented on issue #10046: Provider Url 中除了IP和端口相同，其它信息都不同时，Consumer中Channel绑定的仍是旧的Provider Url 信息
Posted by GitBox <gi...@apache.org>.
chickenlj commented on issue #10046:
URL: https://github.com/apache/dubbo/issues/10046#issuecomment-1154814151
这是一个已知问题，是和当前 Dubbo 的 channel 连接模型有关系的，所有服务共享一条 channel 连接，因此 Dubbo 会选中随机一条 url 用来建立 channel，并且只要连接上有服务在就会一直被复用。
总体从服务和连接管理的层面是没问题的，出问题的是在 `Dubbo 会选中随机一条 url 用来建立 channel` ，这会导致不通服务的 payload 参数配置无法体现在 channel 上（包括后续动态增加的 payload 配置）
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[GitHub] [dubbo] chickenlj closed issue #10046: Provider Url 中除了IP和端口相同，其它信息都不同时，Consumer中Channel绑定的仍是旧的Provider Url 信息
Posted by GitBox <gi...@apache.org>.
chickenlj closed issue #10046: Provider Url 中除了IP和端口相同，其它信息都不同时，Consumer中Channel绑定的仍是旧的Provider Url 信息
URL: https://github.com/apache/dubbo/issues/10046
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Re: [I] Provider Url 中除了IP和端口相同，其它信息都不同时，Consumer中Channel绑定的仍是旧的Provider Url 信息 [dubbo]
Posted by "CHYhave (via GitHub)" <gi...@apache.org>.
CHYhave commented on issue #10046:
URL: https://github.com/apache/dubbo/issues/10046#issuecomment-1874893645
这个问题有解决吗？我在使用泛化调用，只要调成功一次，无论我怎么配置ReferenceConfig都能够调用成功
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