Withdrawn: 8260621: Avoid memory leak in ImageBufferCache

[Bo Zhang]

On Fri, 29 Jan 2021 05:53:57 GMT, Bo Zhang <github.com+12689835+blindpirate at openjdk.org> wrote:

> Previously, `ImageBufferCache` contains a ThreadLocal field which holds
> strong reference to `ImageBufferCache$BufferReference.class`. When loaded
> from `jrt-fs.jar`, this will keep `JrtFileSystemProvider$JrtFsLoader`
> in memory forever and never being GCed.
> 
> The fix replace the old `ImageBufferCache$BufferReference` class with
> `WeakReference<ByteBuffer>`, which is verified by provided test.

This pull request has been closed without being integrated.

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PR: https://git.openjdk.java.net/jdk/pull/2307