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Posted to commits@servicecomb.apache.org by GitBox <gi...@apache.org> on 2021/03/05 09:17:59 UTC
[GitHub] [servicecomb-java-chassis] yhs0092 opened a new issue #2277: Java-Chassis的consumer端可能混用HTTP/1.1和HTTP/2的连接向provider端发送请求吗？
yhs0092 opened a new issue #2277:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2277
在Java-Chassis关于[REST客户端连接池的说明](https://docs.servicecomb.io/java-chassis/zh_CN/config-reference/rest-transport-client/)中，有如下描述
> 连接池在计算是否超过大小的时候，会同时检查这两个配置项。假设访问的服务器为H，那么上述配置，和H建立的最大连接可能性为 HTTP:HTTP2=50:0, HTTP:HTTP2=0:5, HTTP:HTTP2=20:3等。一个客户端和H建立的总的连接数还和servicecomb.rest.client.verticle-count 有关。可以理解为每个vertical会针对H创建一个连接池，连接池个数为vertical-count。
言下之意似乎是Java-Chassis的客户端可能会对某个provider的endpoint混合建立HTTP/1.1和HTTP/2的连接。
但是观察Java-Chassis的源码，无论是master分支的`org.apache.servicecomb.transport.rest.client.RestTransportClient#findHttpClientPool`还是1.3分支的`org.apache.servicecomb.transport.rest.client.RestTransportClient#send`，对于HTTP/1.1和HTTP/2都是用两个客户端实例分别处理的。
那么，实际上在Java-Chassis里，可能出现对同一个endpoint，连接数呈`HTTP:HTTP2=20:3`分布的情况吗？
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[GitHub] [servicecomb-java-chassis] liubao68 edited a comment on issue #2277: Java-Chassis的consumer端可能混用HTTP/1.1和HTTP/2的连接向provider端发送请求吗？
Posted by GitBox <gi...@apache.org>.
liubao68 edited a comment on issue #2277:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2277#issuecomment-791297005
这个描述的是HTTP/2连接池的场景。即HTTP/2连接池可能同时管理HTTP/1连接和HTTP/2连接。 HTTP/2协议首先是通过HTTP/1接入的，然后会执行Upgrade升级为HTTP/2，中间会有HTTP/1连接。
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[GitHub] [servicecomb-java-chassis] yhs0092 commented on issue #2277: Java-Chassis的consumer端可能混用HTTP/1.1和HTTP/2的连接向provider端发送请求吗？
Posted by GitBox <gi...@apache.org>.
yhs0092 commented on issue #2277:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2277#issuecomment-791288421
此外，Vert.x的客户端在`HttpClientOptions#protocolVersion`属性中限制了客户端请求的协议版本，不像是能用同一个HttpClient实例同时建立HTTP/1.1和HTTP/2连接的样子。
但是Vert.x在`HttpChannelConnector`构造方法中还要计算HTTP/1.1连接和HTTP/2连接的权重（见 [HttpChannelConnector构造方法](https://github.com/eclipse-vertx/vert.x/blob/5a07e455fce94b7d458fb629a14167acda119391/src/main/java/io/vertx/core/http/impl/HttpChannelConnector.java#L70)），看着像是会同时容纳HTTP/1.1和HTTP/2连接？这个地方也有点让人看不懂
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[GitHub] [servicecomb-java-chassis] yhs0092 edited a comment on issue #2277: Java-Chassis的consumer端可能混用HTTP/1.1和HTTP/2的连接向provider端发送请求吗？
Posted by GitBox <gi...@apache.org>.
yhs0092 edited a comment on issue #2277:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2277#issuecomment-791288421
此外，Vert.x的客户端在`HttpClientOptions#protocolVersion`属性中限制了客户端请求的协议版本，不像是能用同一个HttpClient实例同时建立HTTP/1.1和HTTP/2连接的样子。
但是Vert.x在`HttpChannelConnector`构造方法中还要计算HTTP/1.1连接和HTTP/2连接的权重（见 [HttpChannelConnector构造方法](https://github.com/eclipse-vertx/vert.x/blob/5a07e455fce94b7d458fb629a14167acda119391/src/main/java/io/vertx/core/http/impl/HttpChannelConnector.java#L70)），看着像是会同时容纳HTTP/1.1和HTTP/2连接？
这个地方也有点让人看不懂，像是矛盾的
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[GitHub] [servicecomb-java-chassis] liubao68 commented on issue #2277: Java-Chassis的consumer端可能混用HTTP/1.1和HTTP/2的连接向provider端发送请求吗？
Posted by GitBox <gi...@apache.org>.
liubao68 commented on issue #2277:
URL: https://github.com/apache/servicecomb-java-chassis/issues/2277#issuecomment-791297005
这个描述的是HTTP/2连接池的场景。即HTTP/2连接池可能同时管理HTTP/1连接和HTTP/2连接。
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