Merge 1550570 from trunk to branch-2 for HADOOP-8753. LocalDirAllocator throws ArithmeticException: divide by zero when there is no available space on configured local dir. Contributed by Benoy Antony.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1550571 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -178,6 +178,9 @@ Release 2.4.0 - UNRELEASED
     TestFileContextResolveAfs and TestStat in branch-2 (Mit Desai via Colin
     Patrick McCabe)
 
+    HADOOP-8753. LocalDirAllocator throws "ArithmeticException: / by zero" when
+    there is no available space on configured local dir. (Benoy Antony via hitesh)
+
 Release 2.3.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

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

@@ -362,6 +362,10 @@ public class LocalDirAllocator {
           totalAvailable += availableOnDisk[i];
         }
 
+        if (totalAvailable == 0){
+          throw new DiskErrorException("No space available in any of the local directories.");
+        }
+
         // Keep rolling the wheel till we get a valid path
         Random r = new java.util.Random();
         while (numDirsSearched < numDirs && returnPath == null) {