From b417670877ec11bf28531f9c2e87825ff85a42c5 Mon Sep 17 00:00:00 2001
From: tomsun28 <tomsun28@outlook.com>
Date: Tue, 5 Dec 2023 17:53:05 +0800
Subject: [PATCH] bugfix CalculateAlarm execAlertExpression NPE (#1388)

Signed-off-by: tomsun28 <tomsun28@outlook.com>
---
 .../org/dromara/hertzbeat/alert/calculate/CalculateAlarm.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/alerter/src/main/java/org/dromara/hertzbeat/alert/calculate/CalculateAlarm.java b/alerter/src/main/java/org/dromara/hertzbeat/alert/calculate/CalculateAlarm.java
index a2ec3a5d3db..a55a6b015d5 100644
--- a/alerter/src/main/java/org/dromara/hertzbeat/alert/calculate/CalculateAlarm.java
+++ b/alerter/src/main/java/org/dromara/hertzbeat/alert/calculate/CalculateAlarm.java
@@ -315,7 +315,7 @@ private boolean execAlertExpression(Map<String, Object> fieldValueMap, String ex
         } catch (Exception e) {
             log.error("Alert Define Rule: {} Run Error: {}.", e, e.getMessage());
         }
-        return match;
+        return match != null && match;
     }
 
     private void handlerAvailableMetrics(long monitorId, String app, CollectRep.MetricsData metricsData) {