svn merge -c 1221106 from trunk for HDFS-2706.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1221107 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -112,6 +112,9 @@ Release 0.23.1 - UNRELEASED
 
     HDFS-2658. HttpFS introduced 70 javadoc warnings. (tucu)
 
+    HDFS-2706. Use configuration for blockInvalidateLimit if it is set.
+    (szetszwo)
+
 Release 0.23.0 - 2011-11-01 
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java

@@ -154,8 +154,10 @@ public class DatanodeManager {
         DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_DEFAULT); // 5 minutes
     this.heartbeatExpireInterval = 2 * heartbeatRecheckInterval
         + 10 * 1000 * heartbeatIntervalSeconds;
-    this.blockInvalidateLimit = Math.max(20*(int)(heartbeatIntervalSeconds),
+    final int blockInvalidateLimit = Math.max(20*(int)(heartbeatIntervalSeconds),
         DFSConfigKeys.DFS_BLOCK_INVALIDATE_LIMIT_DEFAULT);
+    this.blockInvalidateLimit = conf.getInt(
+        DFSConfigKeys.DFS_BLOCK_INVALIDATE_LIMIT_KEY, blockInvalidateLimit);
     LOG.info(DFSConfigKeys.DFS_BLOCK_INVALIDATE_LIMIT_KEY
         + "=" + this.blockInvalidateLimit);
   }