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weichiu pushed a commit to branch branch-3.1
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commit 2ce0914176596378575c340e9c30db80953ed033
Author: Wei-Chiu Chuang <[email protected]>
AuthorDate: Wed Aug 21 09:00:59 2019 -0700

    Revert "HDFS-14476. lock too long when fix inconsistent blocks between disk 
and in-memory. Contributed by Sean Chow."
    
    This reverts commit e978c6c9ed83301fcf8359c35e74ed68045c1a61.
---
 .../hadoop/hdfs/server/datanode/DirectoryScanner.java      | 14 --------------
 1 file changed, 14 deletions(-)

diff --git 
a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DirectoryScanner.java
 
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DirectoryScanner.java
index 5a2f7c2..ab9743c 100644
--- 
a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DirectoryScanner.java
+++ 
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DirectoryScanner.java
@@ -67,7 +67,6 @@ public class DirectoryScanner implements Runnable {
       + " starting at %s with interval of %dms";
   private static final String START_MESSAGE_WITH_THROTTLE = START_MESSAGE
       + " and throttle limit of %dms/s";
-  private static final int RECONCILE_BLOCKS_BATCH_SIZE = 1000;
 
   private final FsDatasetSpi<?> dataset;
   private final ExecutorService reportCompileThreadPool;
@@ -373,11 +372,7 @@ public class DirectoryScanner implements Runnable {
    */
   @VisibleForTesting
   public void reconcile() throws IOException {
-    LOG.debug("reconcile start DirectoryScanning");
     scan();
-    // HDFS-14476: run checkAndUpadte with batch to avoid holding the lock too
-    // long
-    int loopCount = 0;
     for (Entry<String, LinkedList<ScanInfo>> entry : diffs.entrySet()) {
       String bpid = entry.getKey();
       LinkedList<ScanInfo> diff = entry.getValue();
@@ -385,15 +380,6 @@ public class DirectoryScanner implements Runnable {
       for (ScanInfo info : diff) {
         dataset.checkAndUpdate(bpid, info);
       }
-
-      if (loopCount % RECONCILE_BLOCKS_BATCH_SIZE == 0) {
-        try {
-          Thread.sleep(2000);
-        } catch (InterruptedException e) {
-          // do nothing
-        }
-      }
-      loopCount++;
     }
     if (!retainDiffs) clear();
   }


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