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From "Mark Miller (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-12297) Create a good SolrClient for SolrCloud paving the way for async requests, HTTP2, multiplexing, and the latest & greatest Jetty features.
Date Sat, 26 May 2018 10:32:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-12297?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16491606#comment-16491606
] 

Mark Miller commented on SOLR-12297:
------------------------------------

{quote}Perhaps we can use Continuations to get around this.{quote}

Well we can, but the model is a bit difficult for what we have and I think we would want it
to be an optional path as well. It would also be a fair amount of work to hit everything beyond
distrib search and distrib updates which already looks difficult to adapt to efficiently.

I created SOLR-12405 for a better way to limit resources vs configuring lots of pools anyway.
Trying to queue with limits will still eat threads and you have too configure many pools properly.
Better to have one or two configuration options and make sure our pools are properly configured
and working I think. 

> Create a good SolrClient for SolrCloud paving the way for async requests, HTTP2, multiplexing,
and the latest & greatest Jetty features.
> ----------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-12297
>                 URL: https://issues.apache.org/jira/browse/SOLR-12297
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>            Priority: Major
>
> Blocking or async support as well as HTTP2 compatible with multiplexing.
> Once it supports enough and is stable, replace internal usage, allowing async, and eventually
move to HTTP2 connector and allow multiplexing. Could support HTTP1.1 and HTTP2 on different
ports depending on state of the world then.
> The goal of the client itself is to work against HTTP1.1 or HTTP2 with minimal or no
code path differences and the same for async requests (should initially work for both 1.1
and 2 and share majority of code).
> The client should also be able to replace HttpSolrClient and plug into the other clients
the same way.
> I doubt it would make sense to keep ConcurrentUpdateSolrClient eventually though.
> I evaluated some clients and while there are a few options, I went with Jetty's HttpClient.
It's more mature than Apache HttpClient's support (in 5 beta) and we would have to update
to a new API for Apache HttpClient anyway.
> Meanwhile, the Jetty guys have been very supportive of helping Solr with any issues and
I like having the client and server from the same project.



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