--- /dev/null	Mon Nov 17 20:03:32 2014
+++ new/test/javax/xml/jaxp/unittest/javax/xml/stream/XMLOutputFactoryTest/DuplicateNSDeclarationTest.java	Mon Nov 17 20:03:31 2014
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2014, 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.
+ */
+
+package javax.xml.stream.XMLOutputFactoryTest;
+
+import java.io.ByteArrayOutputStream;
+
+import javax.xml.stream.XMLOutputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamWriter;
+import javax.xml.transform.stream.StreamResult;
+
+import org.testng.Assert;
+import org.testng.annotations.Test;
+
+/*
+ * @summary Test the writing of duplicate namespace declarations when IS_REPAIRING_NAMESPACES is ture.
+ */
+public class DuplicateNSDeclarationTest {
+
+    @Test
+    public void testDuplicateNSDeclaration() {
+
+        // expect only 1 Namespace Declaration
+        final String EXPECTED_OUTPUT = "<?xml version=\"1.0\" ?>" + "<ns1:foo" + " xmlns:ns1=\"http://example.com/\">" + "</ns1:foo>";
+
+        // have XMLOutputFactory repair Namespaces
+        XMLOutputFactory ofac = XMLOutputFactory.newInstance();
+        ofac.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, new Boolean(true));
+
+        // send output to a Stream
+        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+        StreamResult sr = new StreamResult(buffer);
+        XMLStreamWriter w = null;
+
+        // write a duplicate Namespace Declaration
+        try {
+            w = ofac.createXMLStreamWriter(sr);
+            w.writeStartDocument();
+            w.writeStartElement("ns1", "foo", "http://example.com/");
+            w.writeNamespace("ns1", "http://example.com/");
+            w.writeNamespace("ns1", "http://example.com/");
+            w.writeEndElement();
+            w.writeEndDocument();
+            w.close();
+        } catch (XMLStreamException xmlStreamException) {
+            xmlStreamException.printStackTrace();
+            Assert.fail(xmlStreamException.toString());
+        }
+
+        // debugging output for humans
+        System.out.println();
+        System.out.println("actual:   \"" + buffer.toString() + "\"");
+        System.out.println("expected: \"" + EXPECTED_OUTPUT + "\"");
+
+        // are results as expected?
+        Assert.assertEquals(EXPECTED_OUTPUT, buffer.toString());
+    }
+}