HDFS-9484. NNThroughputBenchmark$BlockReportStats should not send empty block 
reports. Contributed by Mingliang Liu.


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/33d4588a
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/33d4588a
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/33d4588a

Branch: refs/heads/branch-2
Commit: 33d4588a7c57a0945f82fb14d8127d49c9ec68d2
Parents: 3aa73a8
Author: Konstantin V Shvachko <s...@apache.org>
Authored: Thu Dec 3 14:51:06 2015 -0800
Committer: Konstantin V Shvachko <s...@apache.org>
Committed: Thu Dec 3 14:56:00 2015 -0800

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 hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt                    | 3 +++
 .../hadoop/hdfs/server/namenode/NNThroughputBenchmark.java     | 6 +++---
 2 files changed, 6 insertions(+), 3 deletions(-)
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/33d4588a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt 
b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index 3b3d074..c43b2c4 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -1571,6 +1571,9 @@ Release 2.8.0 - UNRELEASED
     HDFS-9429. Tests in TestDFSAdminWithHA intermittently fail with
     EOFException (Xiao Chen via Colin P. McCabe)
 
+    HDFS-9484. NNThroughputBenchmark$BlockReportStats should not send empty
+    block reports. (Mingliang Liu via shv)
+
 Release 2.7.3 - UNRELEASED
 
   INCOMPATIBLE CHANGES

http://git-wip-us.apache.org/repos/asf/hadoop/blob/33d4588a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/NNThroughputBenchmark.java
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diff --git 
a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/NNThroughputBenchmark.java
 
b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/NNThroughputBenchmark.java
index 91f9793..8a594ed 100644
--- 
a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/NNThroughputBenchmark.java
+++ 
b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/NNThroughputBenchmark.java
@@ -925,7 +925,7 @@ public class NNThroughputBenchmark implements Tool {
     NamespaceInfo nsInfo;
     DatanodeRegistration dnRegistration;
     DatanodeStorage storage; //only one storage 
-    final ArrayList<BlockReportReplica> blocks;
+    final List<BlockReportReplica> blocks;
     int nrBlocks; // actual number of blocks
     BlockListAsLongs blockReportList;
     final int dnIdx;
@@ -938,7 +938,7 @@ public class NNThroughputBenchmark implements Tool {
 
     TinyDatanode(int dnIdx, int blockCapacity) throws IOException {
       this.dnIdx = dnIdx;
-      this.blocks = new ArrayList<BlockReportReplica>(blockCapacity);
+      this.blocks = Arrays.asList(new BlockReportReplica[blockCapacity]);
       this.nrBlocks = 0;
     }
 
@@ -1013,7 +1013,7 @@ public class NNThroughputBenchmark implements Tool {
         Block block = new Block(blocks.size() - idx, 0, 0);
         blocks.set(idx, new BlockReportReplica(block));
       }
-      blockReportList = BlockListAsLongs.EMPTY;
+      blockReportList = BlockListAsLongs.encode(blocks);
     }
 
     BlockListAsLongs getBlockReportList() {

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