Phillip Webb aac367e9c5 Attempt to fix memory leak in JarFile class
Create a new `JarFileWrapper` class so that we can wrap and existing
`JarFile` and offer a version that can be safely closed.

Prior to this commit, we provided wrapper functionality in the `JarFile`
class itself. Unfortunately, because we override `close` and also create
a lot of wrappers this caused memory issues when running on Java 11.

With Java 11 `java.util.zip.ZipFile` class uses `FinalizableResource`
for any implementation that overrides `close()`. This means that any
wrapper classes will not be garbage collected until the JVM finalizer
thread runs.

Closes gh-22991
2020-08-18 14:07:03 -07:00
..
2020-07-24 11:54:12 +01:00