diff --git a/hadoop-mapreduce-project/CHANGES.txt b/hadoop-mapreduce-project/CHANGES.txt
index ffbe4efabfc..8624806939f 100644
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@@ -12,6 +12,8 @@ Release 2.7.1 - UNRELEASED
 
   BUG FIXES
 
+    MAPREDUCE-6300. Task list sort by task id broken. (Siqi Li via aajisaka)
+
 Release 2.7.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/webapp/TasksPage.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/webapp/TasksPage.java
index 0212ae4f741..96485279db2 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/webapp/TasksPage.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/webapp/TasksPage.java
@@ -43,7 +43,7 @@ public class TasksPage extends AppView {
       .append(", bProcessing: true")
 
       .append("\n, aoColumnDefs: [\n")
-      .append("{'sType':'numeric', 'aTargets': [0]")
+      .append("{'sType':'string', 'aTargets': [0]")
       .append(", 'mRender': parseHadoopID }")
 
       .append("\n, {'sType':'numeric', bSearchable:false, 'aTargets': [1]")
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/HsTasksPage.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/HsTasksPage.java
index 4e2b6878df0..2619dffdd04 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/HsTasksPage.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/webapp/HsTasksPage.java
@@ -76,7 +76,7 @@ public class HsTasksPage extends HsView {
     .append(", bProcessing: true")
 
     .append("\n, aoColumnDefs: [\n")
-    .append("{'sType':'numeric', 'aTargets': [ 0 ]")
+    .append("{'sType':'string', 'aTargets': [ 0 ]")
     .append(", 'mRender': parseHadoopID }")
 
     .append(", {'sType':'numeric', 'aTargets': [ 4")