--- old/src/java.xml/share/classes/com/sun/org/apache/xerces/internal/parsers/XML11Configuration.java	2017-02-15 18:49:28.870956646 +0300
+++ new/src/java.xml/share/classes/com/sun/org/apache/xerces/internal/parsers/XML11Configuration.java	2017-02-15 18:49:28.762956649 +0300
@@ -415,9 +415,12 @@
     /** Current DTD scanner. */
     protected XMLDTDScanner fCurrentDTDScanner;
 
-    /** Flag indiciating whether XML11 components have been initialized. */
+    /** Flag indicating whether XML11 components have been initialized. */
     private boolean f11Initialized = false;
 
+    /** Flag indicating whether the symbol table instance was specified during construction **/
+    private boolean fSymbolTableProvided = false;
+
     //
     // Constructors
     //
@@ -566,15 +569,18 @@
         };
         addRecognizedProperties(recognizedProperties);
 
-        if (symbolTable == null) {
-                symbolTable = new SymbolTable();
+        // Remember if symbolTable was provided from outside
+        fSymbolTableProvided = symbolTable != null;
+        if (!fSymbolTableProvided) {
+            fSymbolTable = new SymbolTable();
+        } else {
+            fSymbolTable = symbolTable;
         }
-        fSymbolTable = symbolTable;
         fProperties.put(SYMBOL_TABLE, fSymbolTable);
 
         fGrammarPool = grammarPool;
         if (fGrammarPool != null) {
-                        fProperties.put(XMLGRAMMAR_POOL, fGrammarPool);
+            fProperties.put(XMLGRAMMAR_POOL, fGrammarPool);
         }
 
         fEntityManager = new XMLEntityManager();
@@ -840,6 +846,13 @@
                 fValidationManager.reset();
                 fVersionDetector.reset(this);
                 fConfigUpdated = true;
+
+                // Reset the symbol table if it wasn't provided during construction
+                if (!fSymbolTableProvided) {
+                    fSymbolTable = new SymbolTable();
+                }
+                fProperties.put(SYMBOL_TABLE, fSymbolTable);
+
                 resetCommon();
 
                 short version = fVersionDetector.determineDocVersion(fInputSource);
--- /dev/null	2017-02-15 13:45:39.063316729 +0300
+++ new/test/javax/xml/jaxp/unittest/sax/SymbolTableResetTest.java	2017-02-15 18:49:29.342956637 +0300
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2017, 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 sax;
+
+import java.io.StringReader;
+
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+import org.testng.Assert;
+import org.testng.annotations.Listeners;
+import org.testng.annotations.Test;
+import org.xml.sax.InputSource;
+import org.xml.sax.helpers.DefaultHandler;
+
+/*
+ * @test
+ * @bug 8173390
+ * @library /javax/xml/jaxp/libs /javax/xml/jaxp/unittest
+ * @run testng/othervm -DrunSecMngr=true sax.SymbolTableResetTest
+ * @run testng/othervm sax.SymbolTableResetTest
+ * @summary Test that SAXParser reallocates symbol table during
+ *          subsequent parse operations
+ */
+@Listeners({jaxp.library.BasePolicy.class})
+public class SymbolTableResetTest {
+
+    /*
+     * Test mimics the SAXParser usage in SAAJ-RI that reuses the
+     * parsers from the internal pool. To avoid memory leaks, symbol
+     * table associated with the parser should be reallocated during each
+     * parse() operation.
+     */
+    @Test
+    public void testReset() throws Exception {
+        // Dummy xml input for parser
+        String input = "<dummy>Test</dummy>";
+        // Create SAXParser
+        SAXParserFactory  spf = SAXParserFactory.newInstance();
+        SAXParser p = spf.newSAXParser();
+        // First parse iteration
+        p.parse(new InputSource(new StringReader(input)), new DefaultHandler());
+        // Get first symbol table reference
+        Object symTable1 = p.getProperty(SYMBOL_TABLE_PROPERTY);
+        p.reset();
+        // Second parse iteration
+        p.parse(new InputSource(new StringReader(input)), new DefaultHandler());
+        // Get second symbol table reference
+        Object symTable2 = p.getProperty(SYMBOL_TABLE_PROPERTY);
+        // Output symbol table references to log
+        System.out.println("Symbol table reference after first parse operation:"+symTable1);
+        System.out.println("Symbol table reference after second parse operation:"+symTable2);
+        // Symbol table references should be different
+        Assert.assertNotEquals(symTable1, symTable2, "Symbol table refence is the same");
+    }
+
+    // Symbol table property
+    private static final String SYMBOL_TABLE_PROPERTY = "http://apache.org/xml/properties/internal/symbol-table";
+
+}