diff --git a/source/dnode/vnode/src/tsdb/tsdbFS2.c b/source/dnode/vnode/src/tsdb/tsdbFS2.c
index afc9b7db3a..afe6ef6e1a 100644
--- a/source/dnode/vnode/src/tsdb/tsdbFS2.c
+++ b/source/dnode/vnode/src/tsdb/tsdbFS2.c
@@ -967,7 +967,6 @@ int32_t tsdbFSCreateRefSnapshot(STFileSystem *fs, TFileSetArray **fsetArr) {
   fsetArr[0] = taosMemoryCalloc(1, sizeof(*fsetArr[0]));
   if (fsetArr[0] == NULL) return TSDB_CODE_OUT_OF_MEMORY;
 
-  taosThreadRwlockRdlock(&fs->tsdb->rwLock);
   TARRAY2_FOREACH(fs->fSetArr, fset) {
     code = tsdbTFileSetInitRef(fs->tsdb, fset, &fset1);
     if (code) break;
@@ -975,7 +974,6 @@ int32_t tsdbFSCreateRefSnapshot(STFileSystem *fs, TFileSetArray **fsetArr) {
     code = TARRAY2_APPEND(fsetArr[0], fset1);
     if (code) break;
   }
-  taosThreadRwlockUnlock(&fs->tsdb->rwLock);
 
   if (code) {
     TARRAY2_DESTROY(fsetArr[0], tsdbTFileSetClear);
diff --git a/source/dnode/vnode/src/tsdb/tsdbRead2.c b/source/dnode/vnode/src/tsdb/tsdbRead2.c
index aa79c0c159..868529e4dd 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead2.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead2.c
@@ -4935,11 +4935,12 @@ int32_t tsdbTakeReadSnap2(STsdbReader* pReader, _query_reseek_func_t reseek, STs
     tsdbRefMemTable(pTsdb->imem, pSnap->pINode);
   }
 
+  // fs
+  code = tsdbFSCreateRefSnapshot(pTsdb->pFS, &pSnap->pfSetArray);
+
   // unlock
   taosThreadRwlockUnlock(&pTsdb->rwLock);
 
-  // fs
-  code = tsdbFSCreateRefSnapshot(pTsdb->pFS, &pSnap->pfSetArray);
   if (code == TSDB_CODE_SUCCESS) {
     tsdbTrace("vgId:%d, take read snapshot", TD_VID(pTsdb->pVnode));
   }
diff --git a/source/dnode/vnode/src/tsdb/tsdbSnapshot.c b/source/dnode/vnode/src/tsdb/tsdbSnapshot.c
index 01b42f1f6a..e4011ca400 100644
--- a/source/dnode/vnode/src/tsdb/tsdbSnapshot.c
+++ b/source/dnode/vnode/src/tsdb/tsdbSnapshot.c
@@ -424,7 +424,10 @@ int32_t tsdbSnapReaderOpen(STsdb* tsdb, int64_t sver, int64_t ever, int8_t type,
   reader[0]->ever = ever;
   reader[0]->type = type;
 
+  taosThreadRwlockRdlock(&tsdb->rwLock);
   code = tsdbFSCreateRefSnapshot(tsdb->pFS, &reader[0]->fsetArr);
+  taosThreadRwlockUnlock(&tsdb->rwLock);
+
   TSDB_CHECK_CODE(code, lino, _exit);
 
 _exit: