From d98c54816d21d59c4d877ae4b1917b22268ffcef Mon Sep 17 00:00:00 2001
From: Surendra Singh Lilhore <surendralilhore@apache.org>
Date: Fri, 6 Sep 2019 18:12:42 +0530
Subject: [PATCH] HDFS-13913. LazyPersistFileScrubber.run() should log
 meaningful warn message. Contributed by Daniel Green.

---
 .../apache/hadoop/hdfs/server/namenode/FSNamesystem.java   | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
index 9d6e99e2a6..c9b05299cf 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
@@ -4244,8 +4244,11 @@ public void run() {
             }
           }
         } catch (Exception e) {
-          FSNamesystem.LOG.error(
-              "Ignoring exception in LazyPersistFileScrubber:", e);
+          FSNamesystem.LOG.warn(
+              "LazyPersistFileScrubber encountered an exception while "
+                      + "scanning for lazyPersist files with missing blocks. "
+                      + "Scanning will retry in " + scrubIntervalSec +
+                      " seconds. Exception: ", e);
         }
 
         try {