From ecc95e70543753e01d612bfe5641f6f8a2397f68 Mon Sep 17 00:00:00 2001
From: slguan <slguan@taosdata.com>
Date: Fri, 17 Apr 2020 13:10:54 +0800
Subject: [PATCH] set master when there is only one node

---
 src/mnode/src/mgmtMnode.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/mnode/src/mgmtMnode.c b/src/mnode/src/mgmtMnode.c
index 491fcb5302..e469dc4f6f 100644
--- a/src/mnode/src/mgmtMnode.c
+++ b/src/mnode/src/mgmtMnode.c
@@ -87,6 +87,14 @@ static int32_t mgmtMnodeActionDecode(SSdbOperDesc *pOper) {
 }
 
 static int32_t mgmtMnodeActionRestored() {
+  if (mgmtGetMnodesNum() == 1) {
+    SMnodeObj *pMnode = NULL;
+    mgmtGetNextMnode(NULL, &pMnode);
+    if (pMnode != NULL) {
+      pMnode->role = TAOS_SYNC_ROLE_MASTER;
+      mgmtReleaseMnode(pMnode);
+    }
+  }
   return TSDB_CODE_SUCCESS;
 }