YARN-9210. RM nodes web page can not display node info. Contributed by Jiandan Yang.

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

@@ -166,7 +166,7 @@ class NodesPage extends RmView {
         nodeTableData.append("<br title='")
             .append(String.valueOf(info.getLastHealthUpdate())).append("'>")
             .append(Times.format(info.getLastHealthUpdate())).append("\",\"")
-            .append(info.getHealthReport()).append("\",\"")
+            .append(StringEscapeUtils.escapeJava(info.getHealthReport())).append("\",\"")
             .append(String.valueOf(info.getNumContainers())).append("\",\"")
             .append("<br title='").append(String.valueOf(usedMemory))
             .append("'>").append(StringUtils.byteDesc(usedMemory * BYTES_IN_MB))
@@ -201,9 +201,8 @@ class NodesPage extends RmView {
             nodeTableData.length() - 1);
       }
       nodeTableData.append("]");
-      String nodeTableDataEscaped = StringEscapeUtils.escapeJava(nodeTableData.toString());
       html.script().$type("text/javascript")
-          ._("var nodeTableData=" + nodeTableDataEscaped)._();
+          ._("var nodeTableData=" + nodeTableData)._();
       tbody._()._();
     }
   }