ravening commented on a change in pull request #5649:
URL: https://github.com/apache/cloudstack/pull/5649#discussion_r741130770



##########
File path: 
framework/quota/src/main/java/org/apache/cloudstack/quota/QuotaAlertManagerImpl.java
##########
@@ -325,14 +326,20 @@ public void sentSuccessfully(final QuotaAccountDao 
quotaAccountDao) {
         }
     };
 
-    protected void sendQuotaAlert(List<String> emails, String subject, String 
body) {
+    protected void sendQuotaAlert(String accountUuid, List<String> emails, 
String subject, String body) {
         SMTPMailProperties mailProperties = new SMTPMailProperties();
 
         mailProperties.setSender(new MailAddress(senderAddress));
         mailProperties.setSubject(subject);
         mailProperties.setContent(body);
         mailProperties.setContentType("text/html; charset=utf-8");
 
+        if (CollectionUtils.isEmpty(emails)) {
+            s_logger.warn(String.format("Unable to send quota alert email with 
subject [%s] and content [%s]. "

Review comment:
       Not a big deal but `Unable to send quota alert email` might give 
different meaning like something wrong with email system or configuration but 
the actual reason is the empty list. Just mentioning that the list is empty 
should be good enough




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