--- 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);