HADOOP-7937. Forward port SequenceFile#syncFs and friends from Hadoop 1.x.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1228291 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -983,6 +983,9 @@ Release 0.22.1 - Unreleased
 
   BUG FIXES
 
+    HADOOP-7937. Forward port SequenceFile#syncFs and friends from Hadoop 1.x.
+    (tomwhite)
+
 Release 0.22.0 - 2011-11-29
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/SequenceFile.java

@@ -1193,6 +1193,13 @@ public class SequenceFile {
       }
     }
 
+    /** flush all currently written data to the file system */
+    public void syncFs() throws IOException {
+      if (out != null) {
+        out.sync();                               // flush contents to file system
+      }
+    }
+
     /** Returns the configuration of this file. */
     Configuration getConf() { return conf; }