pklim101 commented on issue #435: ParallelChannel 如何支持 http client 并发请求 URL: https://github.com/apache/incubator-brpc/issues/435#issuecomment-591306448 > http方式是支持ParallelChannel的，但是只能支持不同Server发送相同的请求。这是由于http只能使用CallMethod设置request和response为NULL的方式调用，没法在CallMapper和ResponseMerger中对不同的Server构造不同的请求并Merge应答。如果需要向不同的http server发送不同的请求，最简单的方式就是使用半同步的方式来实现ParallelChannel，也可以通过CountDownEvent和bthread_start_backgroud实现，或者是定制CallMethod的Done来实现。 ParallelChannel里response不能设置为NULL。 "we don't support http whose response is NULL"
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