HDFS-5558. LeaseManager monitor thread can crash if the last block is complete but another block is not. Contributed by Kihwal Lee.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1547393 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -4063,6 +4063,9 @@ Release 0.23.10 - UNRELEASED
     HDFS-5557. Write pipeline recovery for the last packet in the block may
     cause rejection of valid replicas. (kihwal)
 
+    HDFS-5558. LeaseManager monitor thread can crash if the last block is
+    complete but another block is not. (kihwal)
+
 Release 0.23.9 - 2013-07-08
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java

@@ -2933,6 +2933,12 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
       }
       throw lee;
     }
+    // Check the state of the penultimate block. It should be completed
+    // before attempting to complete the last one.
+    if (!checkFileProgress(pendingFile, false)) {
+      return false;
+    }
+
     // commit the last block and complete it if it has minimum replicas
     commitOrCompleteLastBlock(pendingFile, last);
 
@@ -3002,7 +3008,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
         //
         BlockInfo b = v.getPenultimateBlock();
         if (b != null && !b.isComplete()) {
-          LOG.info("BLOCK* checkFileProgress: " + b
+          LOG.warn("BLOCK* checkFileProgress: " + b
               + " has not reached minimal replication "
               + blockManager.minReplication);
           return false;