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Posted to commits@servicecomb.apache.org by GitBox <gi...@apache.org> on 2021/08/31 02:32:00 UTC

[GitHub] [servicecomb-java-chassis] qubo11 opened a new issue #2535: Client调用Server的问题咨询

qubo11 opened a new issue #2535:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2535


   写了一个小例子，就是简单的Client调用Server的demo：
   ![image](https://user-images.githubusercontent.com/4074496/131431604-5caae9a0-3826-4805-8928-997691e0dd16.png)
   
   在Controller中，使用的是业务线程：
   ![image](https://user-images.githubusercontent.com/4074496/131431763-6e261b2a-65e8-4e16-8416-f8e22156431c.png)
   
   当Client调用Server的接口的时候，在RestClientInvocation#invoke方法中，发送请求的时候，会使用EventLoop线程，我看源码有一行注释“从业务线程转移到网络线程中去发送”，疑问：
   1.Client接收请求和Client发送Server请求是同一个EventLoop线程吧？
   2.如果是同一个EventLoop线程，那如果我Client调用Server有阻塞，也会影响Client本身的接收请求的吞吐量吧？
   


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[GitHub] [servicecomb-java-chassis] qubo11 commented on issue #2535: Client调用Server的问题咨询

Posted by GitBox <gi...@apache.org>.
qubo11 commented on issue #2535:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2535#issuecomment-908865316


   我看Client接收到的请求是EventLoop线程8，Client调用Server的EventLoop线程是12。
   
   我的意思是，如果Client调用Server的时候，如果网络或者什么原因，导致时延大，那应该也会影响Client本身接收的请求吧？


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[GitHub] [servicecomb-java-chassis] qubo11 commented on issue #2535: Client调用Server的问题咨询

Posted by GitBox <gi...@apache.org>.
qubo11 commented on issue #2535:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2535#issuecomment-908865316


   我看Client接收到的请求是EventLoop线程8，Client调用Server的EventLoop线程是12。
   
   我的意思是，如果Client调用Server的时候，如果网络或者什么原因，导致时延大，那应该也会影响Client本身接收的请求吧？


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[GitHub] [servicecomb-java-chassis] qubo11 commented on issue #2535: Client调用Server的问题咨询

Posted by GitBox <gi...@apache.org>.
qubo11 commented on issue #2535:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2535#issuecomment-912183677


   上述说的client verticle指定是：ClientVerticle类？server verticle指的是：RestServerVerticle类？
   
   我看他们都是用的同一个vertx实例。没太看出来Client和Server的连接池有什么区别哈，我看都是transport-vert.x-eventloop-thread-x线程。


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[GitHub] [servicecomb-java-chassis] liubao68 commented on issue #2535: Client调用Server的问题咨询

Posted by GitBox <gi...@apache.org>.
liubao68 commented on issue #2535:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2535#issuecomment-908855391


   如果你使用的HTTP协议， 请求和应答都是一个连接。 完成请求应答后， 这个连接才会被其他请求复用。 
   event-loop不能阻塞。 


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[GitHub] [servicecomb-java-chassis] liubao68 commented on issue #2535: Client调用Server的问题咨询

Posted by GitBox <gi...@apache.org>.
liubao68 commented on issue #2535:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2535#issuecomment-908855391


   如果你使用的HTTP协议， 请求和应答都是一个连接。 完成请求应答后， 这个连接才会被其他请求复用。 
   event-loop不能阻塞。 


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[GitHub] [servicecomb-java-chassis] fanjiang-2021 commented on issue #2535: Client调用Server的问题咨询

Posted by GitBox <gi...@apache.org>.
fanjiang-2021 commented on issue #2535:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2535#issuecomment-911086504


   #2484


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[GitHub] [servicecomb-java-chassis] liubao68 commented on issue #2535: Client调用Server的问题咨询

Posted by GitBox <gi...@apache.org>.
liubao68 commented on issue #2535:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2535#issuecomment-913378274


   连接池和线程池是两个不同的概念。 transport-vert.x-eventloop-thread是线程池。 


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[GitHub] [servicecomb-java-chassis] fanjiang-2021 edited a comment on issue #2535: Client调用Server的问题咨询

Posted by GitBox <gi...@apache.org>.
fanjiang-2021 edited a comment on issue #2535:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2535#issuecomment-911086504


   #2484 可以参考一下这个
   如果使用reactive模式,因为业务逻辑直接在网络线程中执行，也就是server verticle中执行
   此时，如果需要向外发送请求，并不会再切到client verticle去（可能涉及线程切换），而是直接在当前verticle创建连接池,你们这种应该是没有使用reactive模式吧,这样应该会切到client verticle去创建连接池
   


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