From 214df56e39105e22d2166178e3909b2bb6f55fe2 Mon Sep 17 00:00:00 2001
From: Minglei Jin <mljin@taosdata.com>
Date: Sun, 23 Oct 2022 06:54:24 +0800
Subject: [PATCH] fix: return 0 usage when pTsdb is null

---
 source/dnode/vnode/src/tsdb/tsdbCache.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index bb394e8acc..101a6786de 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -1492,4 +1492,11 @@ void tsdbCacheSetCapacity(SVnode *pVnode, size_t capacity) {
 
 size_t tsdbCacheGetCapacity(SVnode *pVnode) { return taosLRUCacheGetCapacity(pVnode->pTsdb->lruCache); }
 
-size_t tsdbCacheGetUsage(SVnode *pVnode) { return taosLRUCacheGetUsage(pVnode->pTsdb->lruCache); }
+size_t tsdbCacheGetUsage(SVnode *pVnode) {
+  size_t usage = 0;
+  if (pVnode->pTsdb != NULL) {
+    usage = taosLRUCacheGetUsage(pVnode->pTsdb->lruCache);
+  }
+
+  return usage;
+}