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5 changes: 5 additions & 0 deletions server/src/main/java/com/cloud/alert/AlertManagerImpl.java
Original file line number Diff line number Diff line change
Expand Up @@ -712,6 +712,11 @@ public void sendAlert(AlertType alertType, long dataCenterId, Long podId, Long c
return;
}

if (recipients == null) {
s_logger.warn(String.format("No recipients set in 'alert.email.addresses', skipping sending alert with subject: %s and content: %s", subject, content));
return;
}

SMTPMailProperties mailProps = new SMTPMailProperties();
mailProps.setSender(new MailAddress(senderAddress));
mailProps.setSubject(subject);
Expand Down