From 977fc4b15cd93a1c7d5144e75237c5c3d4398ac5 Mon Sep 17 00:00:00 2001
From: Minglei Jin <mljin@taosdata.com>
Date: Fri, 14 Oct 2022 15:28:19 +0800
Subject: [PATCH] fix(tsdb/cache): release lock when table's empty

---
 source/dnode/vnode/src/tsdb/tsdbCache.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index 1615edb6ce..4088d35d3e 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -1311,6 +1311,8 @@ int32_t tsdbCacheGetLastH(SLRUCache *pCache, tb_uid_t uid, STsdb *pTsdb, LRUHand
       // if table's empty or error, return code of -1
       // if (code < 0 || pRow == NULL) {
       if (code < 0 || pLastArray == NULL) {
+        taosThreadMutexUnlock(&pTsdb->lruMutex);
+
         *handle = NULL;
         return 0;
       }