Hi, Please review.
http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8174151-url-class-path-loader/webrev/index.html This is a nasty edge case when a URLStreamHandler is registered (via the system property) to process jar: URLs. The support for multi-release JAR files changed the implementation of ClassLoader.findResource such that the to be returned jar: URLs would not be operated on, and therefore the jar: URLStreamHandler would not be queried [*]. If the returned jar: URL is operated on by the caller then the jar: URLStreamHandler would (of course) be queried. This is arguably an implementation detail but it does change long term established behaviour in a very delicate area. While i find it unpalatable to do so this patch restores the previous behaviour, if a custom jar: URLStreamHandler is registered. The compromise is such a custom jar: URLStreamHandler needs to explicitly support multi-release JAR files. Paul. [*] Note that there are already such optimisations for file: URLs.
