--- a/src/java.xml/share/classes/com/sun/org/apache/xalan/internal/xsltc/trax/TransformerImpl.java	Tue Feb 05 14:36:50 2019 -0800
+++ b/src/java.xml/share/classes/com/sun/org/apache/xalan/internal/xsltc/trax/TransformerImpl.java	Tue Feb 05 15:06:08 2019 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2019, Oracle and/or its affiliates. All rights reserved.
  */
 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
@@ -93,7 +93,7 @@
  * @author Morten Jorgensen
  * @author G. Todd Miller
  * @author Santiago Pericas-Geertsen
- * @LastModified: Nov 2017
+ * @LastModified: Feb 2019
  */
 public final class TransformerImpl extends Transformer
     implements DOMCache, ErrorListener
@@ -925,7 +925,7 @@
             }
         }
         else {
-            _properties = _propertiesClone;
+            _properties = (Properties)_propertiesClone.clone();
         }
     }
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jaxp/javax/xml/jaxp/unittest/transform/ResetTest.java	Tue Feb 05 15:06:08 2019 -0800
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2019, 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 transform;
+
+import java.io.ByteArrayInputStream;
+import java.io.StringWriter;
+import java.io.UnsupportedEncodingException;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.stream.StreamResult;
+import javax.xml.transform.stream.StreamSource;
+
+import org.testng.annotations.Test;
+import javax.xml.transform.OutputKeys;
+import org.testng.Assert;
+
+/*
+ * @test
+ * @bug 8180901
+ * @library /javax/xml/jaxp/libs /javax/xml/jaxp/unittest
+ * @run testng/othervm transform.ResetTest
+ * @summary Verifies reset functions
+ */
+public class ResetTest {
+
+    private static final String INPUT_XML = "<a><b>123</b><c/></a>";
+    /*
+     * Verifies that the reset method sets the Transformer to its original state
+     * properly.
+    */
+    @Test
+    public void testReset() throws Exception {
+        TransformerFactory transformerFactory =
+                new com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl();
+
+        // run #1
+        Transformer transformer = transformerFactory.newTransformer();
+
+        setDefaultOutputProperties(transformer);
+        String outputXml1 = transform(INPUT_XML, transformer);
+        System.out.println("#1 output XML: " + outputXml1);
+
+        // run #2
+        transformer.reset();
+
+        setDefaultOutputProperties(transformer);
+        // use different output properties in run #2 (after the 1st reset):
+        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
+        String outputXml2 = transform(INPUT_XML, transformer);
+        System.out.println("#2 output XML: " + outputXml2);
+
+        // run #3
+        transformer.reset();
+
+        setDefaultOutputProperties(transformer);
+        // use same output properties as run #1 => expect same output
+        String outputXml3 = transform(INPUT_XML, transformer);
+        System.out.println("#3 output XML: " + outputXml3);
+        Assert.assertEquals(outputXml3, outputXml1, "Output is expected to be equal after reset.");
+    }
+
+    private static void setDefaultOutputProperties(Transformer transformer) {
+        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
+        transformer.setOutputProperty(OutputKeys.METHOD, "xml");
+        transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
+    }
+
+    private static String transform(String xml, Transformer transformer)
+            throws TransformerException, UnsupportedEncodingException {
+        StringWriter writer = new StringWriter();
+        transformer.transform(new StreamSource(new ByteArrayInputStream(xml.getBytes("UTF-8"))),
+                              new StreamResult(writer));
+        return writer.toString();
+    }
+}