Apache HttpComponents 4.3 required at runtime but not listed in migration guide [SPR-11383]

[spring-projects-issues]

jose luis sanchez opened SPR-11383 and commented

There's a missing dependency been upgraded, or at least, changed since spring 3.x.

Spring 4.x now uses commons-httpclient 4.3.x, as previous releases did not include CloseableHttpClient class :

Caused by: java.lang.NoClassDefFoundError: org/apache/http/impl/client/CloseableHttpClient
at org.springframework.http.client.HttpComponentsClientHttpRequestFactory.<init>(HttpComponentsClientHttpRequestFactory.java:85) ~[spring-web-4.0.1.RELEASE.jar:4.0.1.RELEASE

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Affects: 4.0 GA, 4.0.1

Reference URL: https://github.com/spring-projects/spring-framework/wiki/Migrating-from-earlier-versions-of-the-spring-framework

Issue Links:

• Upgrade HttpComponentsHttpInvokerRequestExecutor to require Apache HttpComponents 4.3 [SPR-11113] #15739 Upgrade HttpComponentsHttpInvokerRequestExecutor to require Apache HttpComponents 4.3

Referenced from: commits d55c22e, f053f60

[spring-projects-issues]

Juergen Hoeller commented

This was half-accidental: We are requiring HttpComponents 4.3 in a few places but didn't mean to require it in all places where we have an optional HttpComponents dependency...

We need to clarify this for Spring Framework 4.0.2: either formally requiring HttpComponents 4.3 everywhere or lowering the technical dependency to HttpComponents 4.2+ again in applicable places.

Juergen

[spring-projects-issues]

Juergen Hoeller commented

I've documented the state of affairs in the javadoc and in the migration guide on GitHub now: For the org.springframework.http.client package, we do require HttpComponents 4.3 or higher. It's just HttpComponentsHttpInvokerRequestExecutor where we preserve HttpComponents 4.2 compatibility for the moment, to be upgraded in Spring 4.1.

Juergen