[SOLR-4451] Upgrade to httpclient 4.2.x and take advantage of SystemDefaultHttpClient

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.2, 6.0
• Assignee: Chris M. Hostetter
• Reporter: Chris M. Hostetter
• Created: 13/Feb/13 03:00
• Updated: 09/May/16 18:43
• Resolved: 13/Feb/13 22:11

Description

HttpComponent is up to version 4.2, and included in 4.2 is a new subclass of DefaultHttpClient named SystemDefaultHttpClient, which automatically configures itself using the "standard" java system properties...

http://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/org/apache/http/impl/client/SystemDefaultHttpClient.html

...i think we should upgrade and start using this new class in place of DefaultHttpClient, so that SolrJ clients (and implicitly SolrCloud) can automaticly leverage system properties users may expect to work.

Issue Links

• breaks: SOLR-4462 SolrJ's httpclient and httpcore dependency versions should not be synchronized - instead, the httpcore version to use should be drawn from the httpclient POM
• relates to: SOLR-3854 SolrCloud does not work with https
• relates to: SOLR-4407 SSL Certificate based authentication for SolrCloud
• relates to: SOLR-4394 Add SSL tests and example configs