7050028: ISE "zip file closed" from JarURLConnection.getInputStream on JDK 7 when !useCaches

Reviewed-by: chegar, alanb

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

@@ -532,15 +532,11 @@ public class URLClassPath {
                 uc = url.openConnection();
                 InputStream in = uc.getInputStream();
                 if (uc instanceof JarURLConnection) {
-                    /* JarURLConnection.getInputStream() returns a separate
-                     * instance on each call. So we have to close this here.
-                     * The jar file cache will keep the file open.
-                     * Also, need to remember the jar file so it can be closed
+                    /* Need to remember the jar file so it can be closed
                      * in a hurry.
                      */
                     JarURLConnection juc = (JarURLConnection)uc;
                     jarfile = juc.getJarFile();
-                    in.close();
                 }
             } catch (Exception e) {
                 return null;

jdk/test/java/net/URLClassLoader/B7050028.java

+/*
+ * Copyright (c) 2011, 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.
+ */
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.net.URLConnection;
+import java.util.zip.CRC32;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipOutputStream;
+
+/**
+ * @test
+ * @bug 7050028
+ * @summary  ISE "zip file closed" from JarURLConnection.getInputStream on JDK 7 when !useCaches
+ * @run main/othervm B7050028
+ */
+
+public class B7050028 {
+    public static void main(String[] args) throws Exception {
+        URLConnection conn = B7050028.class.getResource("B7050028.class").openConnection();
+        int len = conn.getContentLength();
+        byte[] data = new byte[len];
+        InputStream is = conn.getInputStream();
+        is.read(data);
+        is.close();
+        conn.setDefaultUseCaches(false);
+        File jar = File.createTempFile("B7050028", ".jar");
+        jar.deleteOnExit();
+        OutputStream os = new FileOutputStream(jar);
+        ZipOutputStream zos = new ZipOutputStream(os);
+        ZipEntry ze = new ZipEntry("B7050028.class");
+        ze.setMethod(ZipEntry.STORED);
+        ze.setSize(len);
+        CRC32 crc = new CRC32();
+        crc.update(data);
+        ze.setCrc(crc.getValue());
+        zos.putNextEntry(ze);
+        zos.write(data, 0, len);
+        zos.closeEntry();
+        zos.finish();
+        zos.close();
+        os.close();
+        System.out.println(new URLClassLoader(new URL[] {new URL("jar:" + jar.toURI() + "!/")}, ClassLoader.getSystemClassLoader().getParent()).loadClass(B7050028.class.getName()));
+    }
+    private B7050028() {}
+}