From c486dc396c50dc0076009168f80dbb50ea7acca7 Mon Sep 17 00:00:00 2001
From: jianghuazhu <740087514@qq.com>
Date: Sun, 25 Apr 2021 14:31:51 +0800
Subject: [PATCH] HDFS-15978. Solve DatanodeManager#getBlockRecoveryCommand()
 printing IOException. (#2913)  Contributed by JiangHua Zhu.

---
 .../hadoop/hdfs/server/blockmanagement/DatanodeManager.java     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
index 6939e65ba80..8e5a24ba60a 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
@@ -1658,7 +1658,7 @@ public class DatanodeManager {
       BlockUnderConstructionFeature uc = b.getUnderConstructionFeature();
       if(uc == null) {
         throw new IOException("Recovery block " + b +
-            "where it is not under construction.");
+            " where it is not under construction.");
       }
       final DatanodeStorageInfo[] storages = uc.getExpectedStorageLocations();
       // Skip stale nodes during recovery