FsPermission string constructor does not recognize sticky bit. Contributed by Atul Sikaria

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/permission/FsPermission.java

@@ -103,7 +103,7 @@ public FsPermission(FsPermission other) {
    * @throws IllegalArgumentException if <code>mode</code> is invalid
    */
   public FsPermission(String mode) {
-    this(new UmaskParser(mode).getUMask());
+    this(new RawParser(mode).getPermission());
   }
 
   /** Return user {@link FsAction}. */

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/permission/RawParser.java

@@ -0,0 +1,44 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.fs.permission;
+
+import java.util.regex.Pattern;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+
+@InterfaceAudience.Private
+@InterfaceStability.Unstable
+class RawParser extends PermissionParser {
+  private static Pattern rawOctalPattern =
+      Pattern.compile("^\\s*([01]?)([0-7]{3})\\s*$");
+  private static Pattern rawNormalPattern =
+      Pattern.compile("\\G\\s*([ugoa]*)([+=-]+)([rwxt]*)([,\\s]*)\\s*");
+
+  private short permission;
+
+  public RawParser(String modeStr) throws IllegalArgumentException {
+    super(modeStr, rawNormalPattern, rawOctalPattern);
+    permission = (short)combineModes(0, false);
+  }
+
+  public short getPermission() {
+    return permission;
+  }
+
+}