HADOOP-1189. Fix 'No space left on device' exceptions on datanodes. Contributed by Raghu Angadi.

git-svn-id: https://svn.apache.org/repos/asf/lucene/hadoop/trunk@527613 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -162,6 +162,9 @@ Trunk (unreleased changes)
 49. HADOOP-971.  Improve DFS Scalability: Improve name node performance
     by adding a hostname to datanodes map.  (Hairong Kuang via tomwhite)
 
+50. HADOOP-1189.  Fix 'No space left on device' exceptions on datanodes.
+    (Raghu Angadi via tomwhite)
+
 
 Release 0.12.3 - 2007-04-06
 

src/java/org/apache/hadoop/dfs/FSDataset.java

@@ -285,9 +285,9 @@ class FSDataset implements FSConstants {
       }
       
       long getAvailable() throws IOException {
-        long freespace = (long)
-            Math.round( ( ( usableDiskPct * usage.getCapacity() )
-                          - usage.getUsed() - reserved ));
+        long capacity = usage.getCapacity();
+        long freespace = Math.round(usage.getAvailableSkipRefresh() -
+                                    capacity * (1 - usableDiskPct) - reserved); 
         return ( freespace > 0 ) ? freespace : 0;
       }
       

src/java/org/apache/hadoop/fs/DF.java

@@ -110,6 +110,22 @@ public class DF {
     return mount;
   }
   
+  public long getCapacitySkipRefresh() { 
+    return capacity; 
+  }
+  
+  public long getUsedSkipRefresh() { 
+    return used;
+  }
+  
+  public long getAvailableSkipRefresh() { 
+    return available;
+  }
+  
+  public int getPercentUsedSkipRefresh() {
+    return percentUsed;
+  }
+  
   public String toString() {
     return
       "df -k " + mount +"\n" +