--- a/jdk/src/java.base/share/classes/java/text/SimpleDateFormat.java	Mon Dec 14 14:08:37 2015 -0800
+++ b/jdk/src/java.base/share/classes/java/text/SimpleDateFormat.java	Tue Dec 15 16:42:30 2015 +0900
@@ -1856,6 +1856,7 @@
             if (patternCharIndex == PATTERN_HOUR_OF_DAY1 ||
                 patternCharIndex == PATTERN_HOUR1 ||
                 (patternCharIndex == PATTERN_MONTH && count <= 2) ||
+                (patternCharIndex == PATTERN_MONTH_STANDALONE && count <= 2) ||
                 patternCharIndex == PATTERN_YEAR ||
                 patternCharIndex == PATTERN_WEEK_YEAR) {
                 // It would be good to unify this with the obeyCount logic below,
@@ -1976,6 +1977,20 @@
                 }
                 break parsing;
 
+            case PATTERN_MONTH_STANDALONE: // 'L'
+                if (count <= 2) {
+                    // Don't want to parse the month if it is a string
+                    // while pattern uses numeric style: L or LL
+                    //[we computed 'value' above.]
+                    calb.set(Calendar.MONTH, value - 1);
+                    return pos.index;
+                }
+                Map<String, Integer> maps = getDisplayNamesMap(field, locale);
+                if ((index = matchString(text, start, field, maps, calb)) > 0) {
+                    return index;
+                }
+                break parsing;
+
             case PATTERN_HOUR_OF_DAY1: // 'k' 1-based.  eg, 23:59 + 1 hour =>> 24:59
                 if (!isLenient()) {
                     // Validate the hour value in non-lenient

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/text/Format/DateFormat/Bug8139572.java	Tue Dec 15 16:42:30 2015 +0900
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+/*
+ * @test
+ * @bug 8139572
+ * @summary SimpleDateFormat parse month stand-alone format bug
+ * @compile -encoding utf-8 Bug8139572.java
+ * @run main Bug8139572
+ */
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.Locale;
+
+public class Bug8139572 {
+
+    private static final Locale RUSSIAN = new Locale("ru");
+    private static final Date SEPT12 = new GregorianCalendar(2015, Calendar.SEPTEMBER, 12).getTime();
+
+    private static final String[] PATTERNS = {
+        "L",
+        "dd L",
+        "dd L yy",
+        "dd L yyyy",
+        "LL",
+        "dd LL",
+        "dd LL yy",
+        "dd LL yyyy",
+        "LLL",
+        "dd LLL",
+        "dd LLL yy",
+        "dd LLL yyyy",
+        "LLLL",
+        "dd LLLL",
+        "dd LLLL yy",
+        "dd LLLL yyyy"
+    };
+
+    private static final String[] APPLIED = {
+        "9",
+        "12 09",
+        "12 09 15",
+        "12 09 2015",
+        "09",
+        "12 09",
+        "12 09 15",
+        "12 09 2015",
+        "сентября",
+        "12 сентября",
+        "12 сентября 15",
+        "12 сентября 2015",
+        "сентября",
+        "12 сентября",
+        "12 сентября 15",
+        "12 сентября 2015"
+    };
+
+    private static final String[] EXPECTED = {
+        "9",
+        "12 9",
+        "12 9 15",
+        "12 9 2015",
+        "09",
+        "12 09",
+        "12 09 15",
+        "12 09 2015",
+        "сент.",
+        "12 сент.",
+        "12 сент. 15",
+        "12 сент. 2015",
+        "сентябрь",
+        "12 сентябрь",
+        "12 сентябрь 15",
+        "12 сентябрь 2015"
+    };
+
+    public static void main(String[] args) throws ParseException {
+
+        for (int i = 0; i < PATTERNS.length; i++) {
+            SimpleDateFormat fmt = new SimpleDateFormat(PATTERNS[i], RUSSIAN);
+            Date standAloneDate = fmt.parse(APPLIED[i]);
+            String str = fmt.format(standAloneDate);
+            if (!EXPECTED[i].equals(str)) {
+                throw new RuntimeException("bad result: got '" + str + "', expected '" + EXPECTED[i] + "'");
+            }
+        }
+
+        SimpleDateFormat fmt = new SimpleDateFormat("", RUSSIAN);
+        for (int j = 0; j < PATTERNS.length; j++) {
+            fmt.applyPattern(PATTERNS[j]);
+            String str = fmt.format(SEPT12);
+            if (!EXPECTED[j].equals(str)) {
+                throw new RuntimeException("bad result: got '" + str + "', expected '" + EXPECTED[j] + "'");
+            }
+        }
+    }
+}