From 785645eef4b4592ea5ce0f2dd8cc037c6266d020 Mon Sep 17 00:00:00 2001
From: Minglei Jin <mljin@taosdata.com>
Date: Wed, 17 Mar 2021 16:26:37 +0800
Subject: [PATCH] [TD-3337]<fix>: [balance] fix pVgroup->pDb NULL pointer crash

---
 src/balance/src/bnMain.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/balance/src/bnMain.c b/src/balance/src/bnMain.c
index 236b22afaf..3055f77e81 100644
--- a/src/balance/src/bnMain.c
+++ b/src/balance/src/bnMain.c
@@ -425,7 +425,7 @@ static bool bnMonitorVgroups() {
 
   while (1) {
     pIter = mnodeGetNextVgroup(pIter, &pVgroup);
-    if (pVgroup == NULL) break;
+    if (pVgroup == NULL || pVgroup->pDb == NULL) break;
 
     int32_t dbReplica = pVgroup->pDb->cfg.replications;
     int32_t vgReplica = pVgroup->numOfVnodes;
@@ -721,4 +721,4 @@ int32_t bnAlterDnode(struct SDnodeObj *pSrcDnode, int32_t vnodeId, int32_t dnode
   mnodeDecDnodeRef(pDestDnode);
 
   return code;
-}
\ No newline at end of file
+}