[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

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.2
• Fix Version/s: 4.2
• Component/s: clients - java
• Assignee: Steven Rowe
• Reporter: Steven Rowe
• Created: 15/Feb/13 15:44
• Updated: 10/May/13 10:34
• Resolved: 15/Feb/13 18:34

Description

The httpcomponents project, which hosts both the httpclient and the httpcore modules, uses Maven as its build system, so when the httpclient POM declares a dependency, it's authoritative (since that's how httpclient is built and tested).

httpclient's httpcore dependency version doesn't always match the httpclient version. Recent examples (look for <httpcore.version> under <properties>) (these are POMs for httpcomponents-client, which is the parent module for httpclient, and declares its submodules' dependencies' versions):

https://svn.apache.org/repos/asf/httpcomponents/httpclient/tags/4.2.3/pom.xml
http://svn.apache.org/repos/asf/httpcomponents/httpclient/tags/4.1.3/pom.xml
http://svn.apache.org/repos/asf/httpcomponents/httpclient/tags/4.1.1/pom.xml

I'm fairly certain that these versions-out-of-sync incidents are not mistakes - I read this email exchange as describing intentionally versioning httpclient separately from httpcore: http://markmail.org/thread/ippp4gbxwwnt6aws.

SolrJ should separately version its httpclient and httpcore dependencies, and should draw the httpcore version from the httpcomponents-client POM.

Issue Links

• is broken by: SOLR-4451 Upgrade to httpclient 4.2.x and take advantage of SystemDefaultHttpClient