Defensively resolve JarFile from JarURLConnection

Closes gh-34216

Author: jhoeller

spring-core/src/main/java/org/springframework/core/io/support/PathMatchingResourcePatternResolver.java

@@ -834,11 +834,17 @@ protected Set<Resource> doFindPathMatchingJarResources(Resource rootDirResource,
 
 		if (con instanceof JarURLConnection jarCon) {
 			// Should usually be the case for traditional JAR files.
-			jarFile = jarCon.getJarFile();
-			jarFileUrl = jarCon.getJarFileURL().toExternalForm();
-			JarEntry jarEntry = jarCon.getJarEntry();
-			rootEntryPath = (jarEntry != null ? jarEntry.getName() : "");
-			closeJarFile = !jarCon.getUseCaches();
+			try {
+				jarFile = jarCon.getJarFile();
+				jarFileUrl = jarCon.getJarFileURL().toExternalForm();
+				JarEntry jarEntry = jarCon.getJarEntry();
+				rootEntryPath = (jarEntry != null ? jarEntry.getName() : "");
+				closeJarFile = !jarCon.getUseCaches();
+			}
+			catch (FileNotFoundException ex) {
+				// Happens in case of cached root directory without specific subdirectory present.
+				return Collections.emptySet();
+			}
 		}
 		else {
 			// No JarURLConnection -> need to resort to URL file parsing.