From 653d43d4d4497f2e42ae7dd612eaf866366d95cf Mon Sep 17 00:00:00 2001
From: Jay Kim <yjaykim@amazon.com>
Date: Tue, 22 Apr 2025 13:35:47 -0700
Subject: [PATCH] chore: update error message to include key name for metric

---
 packages/aws-cdk-lib/aws-cloudwatch/lib/metric.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/aws-cdk-lib/aws-cloudwatch/lib/metric.ts b/packages/aws-cdk-lib/aws-cloudwatch/lib/metric.ts
index 652f626cb9fbf..38eaf28d7dbc0 100644
--- a/packages/aws-cdk-lib/aws-cloudwatch/lib/metric.ts
+++ b/packages/aws-cdk-lib/aws-cloudwatch/lib/metric.ts
@@ -591,7 +591,7 @@ export class Metric implements IMetric {
 
     dimsArray.map(key => {
       if (dims[key] === undefined || dims[key] === null) {
-        throw new cdk.UnscopedValidationError(`Dimension value of '${dims[key]}' is invalid`);
+        throw new cdk.UnscopedValidationError(`Dimension value of '${dims[key]}' is invalid for key: ${key}`);
       }
       if (key.length < 1 || key.length > 255) {
         throw new cdk.UnscopedValidationError(`Dimension name must be at least 1 and no more than 255 characters; received ${key}`);