From 860a9275b7efb997336155cb6668c649e5533d64 Mon Sep 17 00:00:00 2001
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Date: Thu, 10 Oct 2024 16:56:13 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=E9=A2=84=E8=AE=A1?=
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---
 .../internal/apm/pre_calculate/window/distributive.go          | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkg/bk-monitor-worker/internal/apm/pre_calculate/window/distributive.go b/pkg/bk-monitor-worker/internal/apm/pre_calculate/window/distributive.go
index af6d73fd1..3bb631113 100644
--- a/pkg/bk-monitor-worker/internal/apm/pre_calculate/window/distributive.go
+++ b/pkg/bk-monitor-worker/internal/apm/pre_calculate/window/distributive.go
@@ -189,6 +189,9 @@ func (w *DistributiveWindow) getSubWindowMetrics(subId int) (int, int) {
 	traceCount := 0
 	spanCount := 0
 
+	if subWindow == nil {
+		return traceCount, spanCount
+	}
 	subWindow.m.Range(func(key, value any) bool {
 		traceCount++
 		v := value.(CollectTrace)