RFR: 6957241: ClassLoader.getResources() returns only 1 instance when using jar indexing

[Lance Andersen]

On Sep 4, 2021, at 2:53 AM, Alan Bateman <alanb at openjdk.java.net<mailto:alanb at openjdk.java.net>> wrote:

On Sat, 4 Sep 2021 01:53:35 GMT, wxiang <github.com+53162078+shiyuexw at openjdk.org<mailto:github.com+53162078+shiyuexw at openjdk.org>> wrote:

I will first create the patch to remove JAR index support from the URLClassLoader implementation, the `jar i` option.

Thank you. We'll probably need a new JBS issue and PR for that but let's see first if any issues come out of the wood work. Stuart is right that another option for the jar tool is to drop the index when updating an existing JAR file that has an index, we don't need to decide that just yet.

Perhaps the jar validate option could/should be updated to flag when an index is there?

We could add a warning for JDK 18 when main::genIndex is invoked as I assume we would want to at least wait until JDK19 to remove this functionality?

Best
Lance



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PR: https://git.openjdk.java.net/jdk/pull/5316

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Lance Andersen| Principal Member of Technical Staff | +1.781.442.2037
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