YARN-5650. Render Application Timeout value in web UI. Contributed by Akhil PB.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppBlock.java

@@ -40,6 +40,7 @@ import org.apache.hadoop.yarn.api.protocolrecords.GetContainerReportRequest;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptReport;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.ApplicationReport;
+import org.apache.hadoop.yarn.api.records.ApplicationTimeoutType;
 import org.apache.hadoop.yarn.api.records.ContainerReport;
 import org.apache.hadoop.yarn.api.records.FinalApplicationStatus;
 import org.apache.hadoop.yarn.api.records.LogAggregationStatus;
@@ -207,6 +208,14 @@ public class AppBlock extends HtmlBlock {
         overviewTable._("Log Aggregation Status:",
             root_url("logaggregationstatus", app.getAppId()), status.name());
       }
+      long timeout = appReport.getApplicationTimeouts()
+          .get(ApplicationTimeoutType.LIFETIME).getRemainingTime();
+      if (timeout < 0) {
+        overviewTable._("Application Timeout (Remaining Time):", "Unlimited");
+      } else {
+        overviewTable._("Application Timeout (Remaining Time):",
+            String.format("%d seconds", timeout));
+      }
     }
     overviewTable._("Diagnostics:",
         app.getDiagnosticsInfo() == null ? "" : app.getDiagnosticsInfo());

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/dao/AppInfo.java

@@ -259,8 +259,12 @@ public class AppInfo {
           timeout.setTimeoutType(entry.getKey());
           long timeoutInMillis = entry.getValue().longValue();
           timeout.setExpiryTime(Times.formatISO8601(timeoutInMillis));
-          timeout.setRemainingTime(Math
-              .max((timeoutInMillis - System.currentTimeMillis()) / 1000, 0));
+          if (app.isAppInCompletedStates()) {
+            timeout.setRemainingTime(0);
+          } else {
+            timeout.setRemainingTime(Math
+                .max((timeoutInMillis - System.currentTimeMillis()) / 1000, 0));
+          }
           timeouts.add(timeout);
         }
       }