diff --git a/src/share/classes/com/sun/tools/javap/JavapTask.java b/src/share/classes/com/sun/tools/javap/JavapTask.java
index 1c26fd4..f80e6f9 100644
--- a/src/share/classes/com/sun/tools/javap/JavapTask.java
+++ b/src/share/classes/com/sun/tools/javap/JavapTask.java
@@ -455,8 +455,19 @@
                     return EXIT_CMDERR;
             }
 
-            boolean ok = run();
-            return ok ? EXIT_OK : EXIT_ERROR;
+            try {
+                boolean ok = run();
+                return ok ? EXIT_OK : EXIT_ERROR;
+            } finally {
+                if (defaultFileManager != null) {
+                    try {
+                        defaultFileManager.close();
+                        defaultFileManager = null;
+                    } catch (IOException e) {
+                        throw new InternalError(e);
+                    }
+                }
+            }
         } catch (BadArgs e) {
             reportError(e.key, e.args);
             if (e.showUsage) {
@@ -856,7 +867,9 @@
     }
 
     private JavaFileManager getDefaultFileManager(final DiagnosticListener<? super JavaFileObject> dl, PrintWriter log) {
-        return JavapFileManager.create(dl, log);
+        if (defaultFileManager == null)
+            defaultFileManager = JavapFileManager.create(dl, log);
+        return defaultFileManager;
     }
 
     private JavaFileObject getClassFileObject(String className) throws IOException {
@@ -1004,6 +1017,7 @@
 
     protected Context context;
     JavaFileManager fileManager;
+    JavaFileManager defaultFileManager;
     PrintWriter log;
     DiagnosticListener<? super JavaFileObject> diagnosticListener;
     List<String> classes;
diff --git a/test/tools/javap/T6879371.java b/test/tools/javap/T6879371.java
new file mode 100644
index 0000000..6368224
--- /dev/null
+++ b/test/tools/javap/T6879371.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 6879371
+ * @summary javap does not close internal default file manager
+ */
+
+import java.io.*;
+import java.util.zip.*;
+
+public class T6879371 {
+    public static void main(String[] args) throws Exception {
+        new T6879371().run();
+    }
+
+    public void run() throws Exception {
+        // create a simple test class which we can put into
+        // a test zip file and know that it will be used by
+        // javap.
+        File classDir = new File("classes");
+        classDir.mkdir();
+
+        String className = "Test";
+        File javaFile = writeTestFile(className);
+        compileTestFile(classDir, javaFile);
+
+        test(classDir, className, false);
+        test(classDir, className, true);
+    }
+
+    void test(File classDir, String className, boolean useJavaUtilZip) throws Exception {
+        // javac should really not be using system properties like this
+        // -- it should really be using (hidden) options -- but until then
+        // take care to leave system properties as we find them, so as not
+        // to adversely affect other tests that might follow.
+        String prev = System.getProperty("useJavaUtilZip");
+        setProperty("useJavaUtilZip", (useJavaUtilZip ? "true" : null));
+        try {
+            File zipFile = zip(classDir, new File(classDir + ".zip"));
+            javap("-classpath", zipFile.getPath(), className);
+
+            if (!zipFile.delete())
+                throw new Exception("failed to delete " + zipFile);
+        } finally {
+            setProperty("useJavaUtilZip", prev);
+        }
+    }
+
+    File writeTestFile(String name) throws IOException {
+        File f = new File(name + ".java");
+        PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
+        out.println("class " + name + " { }");
+        out.close();
+        return f;
+    }
+
+    void compileTestFile(File classDir, File file) {
+        int rc = com.sun.tools.javac.Main.compile(
+           new String[] { "-d", classDir.getPath(), file.getPath() });
+        if (rc != 0)
+            throw new Error("compilation failed. rc=" + rc);
+    }
+
+    File zip(File dir, File zipFile) throws IOException {
+        ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipFile));
+        for (File file: dir.listFiles()) {
+            if (file.isFile()) {
+                byte[] data = new byte[(int) file.length()];
+                DataInputStream in = new DataInputStream(new FileInputStream(file));
+                in.readFully(data);
+                in.close();
+                zipOut.putNextEntry(new ZipEntry(file.getName()));
+                zipOut.write(data, 0, data.length);
+                zipOut.closeEntry();
+            }
+        }
+        zipOut.close();
+        return zipFile;
+    }
+
+    String javap(String... args) {
+        StringWriter sw = new StringWriter();
+        PrintWriter out = new PrintWriter(sw);
+        int rc = com.sun.tools.javap.Main.run(args, out);
+        if (rc != 0)
+            throw new Error("javap failed. rc=" + rc);
+        out.close();
+        return sw.toString();
+    }
+
+    void setProperty(String key, String value) {
+        if (value != null)
+            System.setProperty(key, value);
+        else
+            System.getProperties().remove(key);
+    }
+}