7183373: URLClassloader.close() does not close JAR files whose resources have...

7183373: URLClassloader.close() does not close JAR files whose resources have been loaded via getResource()
Reviewed-by: chegar

src/share/classes/sun/misc/URLClassPath.java

@@ -508,7 +508,8 @@ public class URLClassPath {
                     }
                 } else {
                     // our best guess for the other cases
-                    InputStream is = url.openStream();
+                    uc.setUseCaches(false);
+                    InputStream is = uc.getInputStream();
                     is.close();
                 }
                 return url;

test/sun/misc/URLClassPath/JarLoaderTest.java

+/*
+ * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * Portions Copyright (c) 2013 IBM Corporation
+ */
+
+/* @test
+ * @bug 7183373
+ * @summary URLClassLoader fails to close handles to Jar files opened during
+ *          getResource()
+ */
+
+import java.io.*;
+import java.net.*;
+import java.util.zip.*;
+
+public class JarLoaderTest {
+    public static void main(String[] args) throws Exception {
+        // Create a JAR file
+        File f = new File("urlcl" + 1 + ".jar");
+        ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(f));
+
+        // add a file
+        zos.putNextEntry(new ZipEntry("TestResource"));
+        byte[] b = "This is a test resource".getBytes();
+        zos.write(b, 0, b.length);
+        zos.close();
+
+        // Load the file using cl.getResource()
+        URLClassLoader cl = new URLClassLoader(new URL[] { new URL("jar:" +
+            f.toURI().toURL() + "!/")}, null);
+        cl.getResource("TestResource");
+
+        // Close the class loader - this should free up all of its Closeables,
+        // including the JAR file
+        cl.close();
+
+        // Try to delete the JAR file
+        f.delete();
+
+        // Check to see if the file was deleted
+        if (f.exists()) {
+            System.out.println(
+                "Test FAILED: Closeables failed to close handle to jar file");
+            // Delete the jar using a workaround
+            for (URL u : cl.getURLs()) {
+                if (u.getProtocol().equals("jar")) {
+                    ((JarURLConnection)u.openConnection()).getJarFile().close();
+                }
+                f.delete();
+            }
+            throw new RuntimeException("File could not be deleted");
+        } else {
+            System.out.println("Test PASSED");
+        }
+    }
+}