Merge pull request #21146 from taosdata/fix/balance-leader-skew

balance leader skew

source/dnode/mnode/impl/src/mndVgroup.c

@@ -1917,7 +1917,7 @@ int32_t mndAddVgroupBalanceToTrans(SMnode *pMnode, SVgObj *pVgroup, STrans *pTra
   int32_t vgid = pVgroup->vgId;
   int8_t replica = pVgroup->replica;
 
- if(pVgroup->replica <= 1) {
+  if(pVgroup->replica <= 1) {
     mInfo("trans:%d, vgid:%d no need to balance, replica:%d", pTrans->id, vgid, replica);
     return -1;
   }
@@ -1951,6 +1951,19 @@ int32_t mndAddVgroupBalanceToTrans(SMnode *pMnode, SVgObj *pVgroup, STrans *pTra
       return -1;
     }
 
+    SDbObj *pDb = mndAcquireDb(pMnode, pVgroup->dbName);
+    if (pDb == NULL) {
+      mError("trans:%d, vgid:%d failed to be balanced to dnode:%d, because db not exist", pTrans->id, vgid, dnodeId);
+      return -1;
+    }
+
+    if (mndAddAlterVnodeConfirmAction(pMnode, pTrans, pDb, pVgroup) != 0) {
+      mError("trans:%d, vgid:%d failed to be balanced to dnode:%d", pTrans->id, vgid, dnodeId);
+      return -1;
+    }
+
+    mndReleaseDb(pMnode, pDb);
+
     SSdbRaw *pRaw = mndVgroupActionEncode(pVgroup);
     if (pRaw == NULL) {
       mError("trans:%d, vgid:%d failed to encode action to dnode:%d", pTrans->id, vgid, dnodeId);
@@ -1965,7 +1978,8 @@ int32_t mndAddVgroupBalanceToTrans(SMnode *pMnode, SVgObj *pVgroup, STrans *pTra
   }
   else
   {
-    mInfo("trans:%d, vgid:%d cant be balanced to dnode:%d, exist:%d, online:%d", pTrans->id, vgid, dnodeId, exist, online);
+    mInfo("trans:%d, vgid:%d cant be balanced to dnode:%d, exist:%d, online:%d", 
+                              pTrans->id, vgid, dnodeId, exist, online);
   }
 
   return 0;