diff --git a/hadoop-mapreduce-project/CHANGES.txt b/hadoop-mapreduce-project/CHANGES.txt
index a0854c1b80..c81868d532 100644
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@@ -346,6 +346,8 @@ 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 0212ae4f74..96485279db 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 @@ private String tasksTableInit() {
       .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 4e2b6878df..2619dffdd0 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 @@ private String tasksTableInit() {
     .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")
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/webapps/static/yarn.dt.plugins.js b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/webapps/static/yarn.dt.plugins.js
index 7b069df483..c9416fd005 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/webapps/static/yarn.dt.plugins.js
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/webapps/static/yarn.dt.plugins.js
@@ -139,6 +139,9 @@ function renderHadoopElapsedTime(data, type, full) {
   return data;  
 }
 
+//JSON array element is formatted like
+//"<a href="/proxy/application_1360183373897_0001>">application_1360183373897_0001</a>"
+//this function removes <a> tag and return a string value for sorting
 function parseHadoopID(data, type, full) {
   if (type === 'display') {
     return data;
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/webapp/AppAttemptPage.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/webapp/AppAttemptPage.java
index 540f6e6bde..c7fe318955 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/webapp/AppAttemptPage.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/webapp/AppAttemptPage.java
@@ -53,8 +53,8 @@ protected Class<? extends SubView> content() {
 
   protected String getContainersTableColumnDefs() {
     StringBuilder sb = new StringBuilder();
-    return sb.append("[\n").append("{'sType':'numeric', 'aTargets': [0]")
+    return sb.append("[\n").append("{'sType':'string', 'aTargets': [0]")
       .append(", 'mRender': parseHadoopID }]").toString();
   }
 
-}
\ No newline at end of file
+}
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/webapp/AppPage.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/webapp/AppPage.java
index cf92c1db9a..50dcd9665e 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/webapp/AppPage.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/webapp/AppPage.java
@@ -55,7 +55,7 @@ protected Class<? extends SubView> content() {
 
   protected String getAttemptsTableColumnDefs() {
     StringBuilder sb = new StringBuilder();
-    return sb.append("[\n").append("{'sType':'numeric', 'aTargets': [0]")
+    return sb.append("[\n").append("{'sType':'string', 'aTargets': [0]")
       .append(", 'mRender': parseHadoopID }")
 
       .append("\n, {'sType':'numeric', 'aTargets': [1]")
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppAttemptBlock.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppAttemptBlock.java
index 8695c6cc6f..d320f4adc9 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppAttemptBlock.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppAttemptBlock.java
@@ -158,8 +158,6 @@ public Collection<ContainerReport> run() throws Exception {
     StringBuilder containersTableData = new StringBuilder("[\n");
     for (ContainerReport containerReport : containers) {
       ContainerInfo container = new ContainerInfo(containerReport);
-      // ConatinerID numerical value parsed by parseHadoopID in
-      // yarn.dt.plugins.js
       containersTableData
         .append("[\"<a href='")
         .append(url("container", container.getContainerId()))
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppBlock.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppBlock.java
index 0d80339344..dd5a4c8363 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppBlock.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppBlock.java
@@ -285,8 +285,6 @@ public ContainerReport run() throws Exception {
         logsLink = containerReport.getLogUrl();
         nodeLink = containerReport.getNodeHttpAddress();
       }
-      // AppAttemptID numerical value parsed by parseHadoopID in
-      // yarn.dt.plugins.js
       attemptsTableData
         .append("[\"<a href='")
         .append(url("appattempt", appAttempt.getAppAttemptId()))
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppsBlock.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppsBlock.java
index 6a35349a8b..93248ea589 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppsBlock.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppsBlock.java
@@ -124,7 +124,6 @@ protected void renderData(Block html) {
       }
       AppInfo app = new AppInfo(appReport);
       String percent = String.format("%.1f", app.getProgress());
-      // AppID numerical value parsed by parseHadoopID in yarn.dt.plugins.js
       appsTableData
         .append("[\"<a href='")
         .append(url("app", app.getAppId()))
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/FairSchedulerAppsBlock.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/FairSchedulerAppsBlock.java
index 8cfd246c73..8a5f4bd218 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/FairSchedulerAppsBlock.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/FairSchedulerAppsBlock.java
@@ -116,7 +116,6 @@ public FairSchedulerAppsBlock(ResourceManager rm, ViewContext ctx,
         // FairScheduler#applications don't have the entry. Skip it.
         continue;
       }
-      //AppID numerical value parsed by parseHadoopID in yarn.dt.plugins.js
       appsTableData.append("[\"<a href='")
       .append(url("app", appInfo.getAppId())).append("'>")
       .append(appInfo.getAppId()).append("</a>\",\"")
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppBlock.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppBlock.java
index 494207994f..3779b91588 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppBlock.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppBlock.java
@@ -172,8 +172,6 @@ public ContainerReport run() throws Exception {
         blacklistedNodesCount = String.valueOf(nodes.size());
       }
 
-      // AppAttemptID numerical value parsed by parseHadoopID in
-      // yarn.dt.plugins.js
       attemptsTableData
           .append("[\"<a href='")
           .append(url("appattempt", appAttempt.getAppAttemptId()))
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppsBlock.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppsBlock.java
index 94f3afac2a..29565e45ba 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppsBlock.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppsBlock.java
@@ -81,7 +81,6 @@ protected void renderData(Block html) {
         blacklistedNodesCount = String.valueOf(nodes.size());
       }
       String percent = String.format("%.1f", app.getProgress());
-      // AppID numerical value parsed by parseHadoopID in yarn.dt.plugins.js
       appsTableData
         .append("[\"<a href='")
         .append(url("app", app.getAppId()))