diff --git a/src/adapter/driver/cache.c b/src/adapter/driver/cache.c
index 0e514d5b..bbc62798 100644
--- a/src/adapter/driver/cache.c
+++ b/src/adapter/driver/cache.c
@@ -123,9 +123,10 @@ void neu_driver_cache_add(neu_driver_cache_t *cache, const char *group,
     nng_mtx_unlock(cache->mtx);
 }
 
-void neu_driver_cache_update(neu_driver_cache_t *cache, const char *group,
-                             const char *tag, int64_t timestamp,
-                             neu_dvalue_t value)
+void neu_driver_cache_update_change(neu_driver_cache_t *cache,
+                                    const char *group, const char *tag,
+                                    int64_t timestamp, neu_dvalue_t value,
+                                    bool change)
 {
     struct elem *elem = NULL;
     tkey_t       key  = to_key(group, tag);
@@ -185,6 +186,9 @@ void neu_driver_cache_update(neu_driver_cache_t *cache, const char *group,
             }
         }
 
+        if (change) {
+            elem->changed = true;
+        }
         elem->value.type  = value.type;
         elem->value.value = value.value;
     }
@@ -192,6 +196,13 @@ void neu_driver_cache_update(neu_driver_cache_t *cache, const char *group,
     nng_mtx_unlock(cache->mtx);
 }
 
+void neu_driver_cache_update(neu_driver_cache_t *cache, const char *group,
+                             const char *tag, int64_t timestamp,
+                             neu_dvalue_t value)
+{
+    neu_driver_cache_update_change(cache, group, tag, timestamp, value, false);
+}
+
 int neu_driver_cache_get(neu_driver_cache_t *cache, const char *group,
                          const char *tag, neu_driver_cache_value_t *value)
 {
diff --git a/src/adapter/driver/cache.h b/src/adapter/driver/cache.h
index 0df8b7a6..4e8bf274 100644
--- a/src/adapter/driver/cache.h
+++ b/src/adapter/driver/cache.h
@@ -34,6 +34,10 @@ void neu_driver_cache_add(neu_driver_cache_t *cache, const char *group,
 void neu_driver_cache_update(neu_driver_cache_t *cache, const char *group,
                              const char *tag, int64_t timestamp,
                              neu_dvalue_t value);
+void neu_driver_cache_update_change(neu_driver_cache_t *cache,
+                                    const char *group, const char *tag,
+                                    int64_t timestamp, neu_dvalue_t value,
+                                    bool change);
 
 void neu_driver_cache_del(neu_driver_cache_t *cache, const char *group,
                           const char *tag);
diff --git a/src/adapter/driver/driver.c b/src/adapter/driver/driver.c
index 3c84fa23..36819c91 100644
--- a/src/adapter/driver/driver.c
+++ b/src/adapter/driver/driver.c
@@ -107,12 +107,14 @@ static void update_im(neu_adapter_t *adapter, const char *group,
     neu_reqresp_head_t    header = { 0 };
 
     if (tag == NULL || value.type == NEU_TYPE_ERROR) {
-        nlog_warn("update_im tag is null or value is error");
+        nlog_warn("update_im tag is null or value is error %d",
+                  value.value.i32);
         return;
     }
 
     UT_array *tags = neu_adapter_driver_get_ptag(driver, group, tag);
-    neu_driver_cache_update(driver->cache, group, tag, global_timestamp, value);
+    neu_driver_cache_update_change(driver->cache, group, tag, global_timestamp,
+                                   value, true);
     driver->adapter.cb_funs.update_metric(&driver->adapter,
                                           NEU_METRIC_TAG_READS_TOTAL, 1, NULL);
     neu_datatag_t *first = utarray_front(tags);
@@ -1027,7 +1029,7 @@ UT_array *neu_adapter_driver_get_ptag(neu_adapter_driver_t *driver,
         neu_datatag_t *t = neu_group_find_tag(find->group, tag);
         if (t != NULL) {
             utarray_new(tags, neu_tag_get_icd());
-            utarray_push_back(tags, &t);
+            utarray_push_back(tags, t);
             neu_tag_free(t);
         }
     }