I suspect that httpcomponents.httpclient and httpcomponents.httpcore's versions need to be in sync (see Kris's mail). Can the PR be adjusted to either upgrade httpclient to 4.3.1 xor downgrade httpcore to 4.2.1?

More importantly, because they share they same release lifecycle and the same groupId, they should use the same version property, namely: "version.org.apache.httpcomponents"