[jira] [Created] (SOLR-15223) Deprecate HttpSolrClient, mark httpclient as "optional" in SolrJ

["David Smiley (Jira)" <ji...@apache.org>]

David Smiley created SOLR-15223:
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             Summary: Deprecate HttpSolrClient, mark httpclient as "optional" in SolrJ
                 Key: SOLR-15223
                 URL: https://issues.apache.org/jira/browse/SOLR-15223
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
          Components: SolrJ
            Reporter: David Smiley


Solr has had an HTTP/2 based SolrClient since 8.0.  Maintaining both HTTP/1 and HTTP/2 clients is a pain for maintenance of the project as it sometimes means duplicative (or partially implemented) work, especially for authentication but also sometimes metrics or tracing.  Both adds extra dependencies for SolrJ and thus our users.  It's difficult to grok a codebase using two different HTTP client frameworks.

In this issue, mark HttpSolrClient (and related ones) as deprecated; point to HTTP/2 equivalents.  Furthermore, mark the Apache "httpcomponents" libs as "optional" in the produced Maven pom.xml so that users have to explicitly opt-in to use it.  Announce this in the Solr users list as well.

Out of scope to this issue is completely cutting over within Solr itself.



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