## What is the purpose of the change 在使用dubbo时，provider 无法在url中获取consumer的application，只能获取本服务的application，不知道是框架本身没有考虑到这点，还是故意这么设计的，建议你们在改造dubbo时，能够支持这一点，我们在使用过程中当服务调用方越来越多的时候，有的时候碰到问题时想快速排查哪个调用方的请求导致的问题，现在我们只能通过dubbo admin去找出哪些应用在调用，要一个一个去找对应的应用去排查问题，这么做太低效了，我们之前也有考虑过在每个请求方增加application的必填参数，但是这么做发现作为服务提供方要在每个dto中增加此参数，维护成本太大。
所以在url中带consumer的application，方便provider 维护接口 ## Brief changelog - To append the consumer's appName in the request for rpc invocation, we get the name through ConfigUtil and store it in the map relation (parameters) of URL && attachment of RpcInvocation. - For provider, wo offer a method (getConsumerAppName) in WrappedChannelHandler to get the consumer's appName. ## Verifying this change 西溪百技274期10组issue2 Follow this checklist to help us incorporate your contribution quickly and easily: - [x] Make sure there is a [GITHUB_issue](https://github.com/apache/incubator-dubbo/issues) filed for the change (usually before you start working on it). Trivial changes like typos do not require a GITHUB issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue. - [ ] Format the pull request title like `[Dubbo-XXX] Fix UnknownException when host config not exist #XXX`. Each commit in the pull request should have a meaningful subject line and body. - [ ] Write a pull request description that is detailed enough to understand what the pull request does, how, and why. - [ ] Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add integration-test in [test module](https://github.com/apache/incubator-dubbo/tree/master/dubbo-test). - [ ] Run `mvn clean install -DskipTests` & `mvn clean test-compile failsafe:integration-test` to make sure unit-test and integration-test pass. - [ ] If this contribution is large, please follow the [Software Donation Guide](https://github.com/apache/incubator-dubbo/wiki/Software-donation-guide). [ Full content available at: https://github.com/apache/incubator-dubbo/pull/2364 ] This message was relayed via gitbox.apache.org for [email protected]
