Calling FileSystems.newFileSystem(URI, ...) throws a
FileSystemAlreadyExistsException if a ZipFileSystem for this
URI is already created. We still can use a single instance
of ZipFileSystem by calling FileSystems.getFileSystem. In
this case we use reference counting to determine when this
instance can be safely closed.
But we cannot count references if the same ZipFileSystem is used
from different class loaders. This patch fixes this issue by
creating a file system from Path instead of an URI. Contract of
FileSystemProvider.newFileSystem(Path, ...) doesn't imply throwing
FileSystemAlreadyExistsException.
Issue #KT-37443 fixed
Ilya Matveev
03bb9138ad