From 4c85bb0067e404268814a00c8eca1ff86a10ef42 Mon Sep 17 00:00:00 2001
From: "xiang.zhou" <xiang.zhou@emqx.io>
Date: Wed, 23 Jul 2025 14:31:07 +0800
Subject: [PATCH] memery leak

---
 src/adapter/driver/cache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/adapter/driver/cache.c b/src/adapter/driver/cache.c
index a4675951..1fb18a3b 100644
--- a/src/adapter/driver/cache.c
+++ b/src/adapter/driver/cache.c
@@ -772,7 +772,7 @@ void neu_driver_cache_update_change(neu_driver_cache_t *cache,
         }
         elem->value.type = value.type;
 
-        if (metas != NULL) {
+        if (metas != NULL && n_meta != 0) {
             if (elem->metas != NULL) {
                 free(elem->metas);
             }