HDFS-3194. DataNode block scanner is running too frequently. Contributed by Andy Isaacson

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1373928 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -616,6 +616,9 @@ Branch-2 ( Unreleased changes )
 
     HDFS-3048. Small race in BlockManager#close. (Andy Isaacson via eli)
 
+    HDFS-3194. DataNode block scanner is running too frequently.
+    (Andy Isaacson via eli)
+
   BREAKDOWN OF HDFS-3042 SUBTASKS
 
     HDFS-2185. HDFS portion of ZK-based FailoverController (todd)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockPoolSliceScanner.java

@@ -554,11 +554,9 @@ class BlockPoolSliceScanner {
   }
   
   private synchronized void startNewPeriod() {
-    if (LOG.isDebugEnabled()) {
-      LOG.debug("Starting a new period : work left in prev period : "
+    LOG.info("Starting a new period : work left in prev period : "
         + String.format("%.2f%%", totalBytesToScan == 0 ? 0
             : (bytesLeft * 100.0) / totalBytesToScan));
-    }
 
     // reset the byte counts :
     bytesLeft = totalBytesToScan;
@@ -566,7 +564,6 @@ class BlockPoolSliceScanner {
   }
   
   void scanBlockPoolSlice() {
-    startNewPeriod();
     // Create a new processedBlocks structure
     processedBlocks = new HashMap<Long, Integer>();
     if (!assignInitialVerificationTimes()) {