HCatalogMetadataProvider leaks a reference to its internal data directory, which changes.

new FileSystemDatasetRepository(
          metadataProvider.getFileSystem(),
            /* unused */ metadataProvider.getDataDirectory().getParent(),
          metadataProvider) {
        @Override
        protected Path pathForDataset(String name) {
          return metadataProvider.getDataDirectory();
        }
      };