HDFS-11466. Change dfs.namenode.write-lock-reporting-threshold-ms default from 1000ms to 5000ms. Contributed by Andrew Wang.

(cherry picked from commit d269b488a71a158d3ddcbdea96992abe29725c69)
(cherry picked from commit 5fb785e154b429beb0b2e392c39be91dae65bb5c)
(cherry picked from commit 265ddb20c3aa99c2d91e2a85e82106d4960f5a7b)

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

@@ -72,6 +72,9 @@ Release 2.7.4 - UNRELEASED
 
     HDFS-11333. Print a user friendly error message when plugins are not found. (Wei-Chiu Chuang)
 
+    HDFS-11466. Change dfs.namenode.write-lock-reporting-threshold-ms default
+    from 1000ms to 5000ms. (wang via zhz)
+
   OPTIMIZATIONS
 
     HDFS-10896. Move lock logging logic from FSNamesystem into FSNamesystemLock.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java

@@ -385,7 +385,7 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
   // event to be logged
   public static final String  DFS_NAMENODE_WRITE_LOCK_REPORTING_THRESHOLD_MS_KEY =
       "dfs.namenode.write-lock-reporting-threshold-ms";
-  public static final long    DFS_NAMENODE_WRITE_LOCK_REPORTING_THRESHOLD_MS_DEFAULT = 1000L;
+  public static final long    DFS_NAMENODE_WRITE_LOCK_REPORTING_THRESHOLD_MS_DEFAULT = 5000L;
   public static final String  DFS_NAMENODE_READ_LOCK_REPORTING_THRESHOLD_MS_KEY =
       "dfs.namenode.read-lock-reporting-threshold-ms";
   public static final long    DFS_NAMENODE_READ_LOCK_REPORTING_THRESHOLD_MS_DEFAULT = 5000L;

hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml

@@ -2338,7 +2338,7 @@
 
 <property>
   <name>dfs.namenode.write-lock-reporting-threshold-ms</name>
-  <value>1000</value>
+  <value>5000</value>
   <description>When a write lock is held on the namenode for a long time,
     this will be logged as the lock is released. This sets how long the
     lock must be held for logging to occur.