gabrywu commented on a change in pull request #2872:
URL: 
https://github.com/apache/incubator-dolphinscheduler/pull/2872#discussion_r435903174



##########
File path: 
dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/template/impl/DefaultHTMLTemplate.java
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@@ -116,9 +116,9 @@ private String getTextTypeMessage(String content,boolean 
showAll){
             }
 
             StringBuilder contents = new StringBuilder(100);
-            for (String str : list){
+            for (Object obj : list){

Review comment:
       the type of 'list' variable is List<String> , why replace String with 
Object 




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