enh: refactor the code to create and delete mnodes

source/libs/sync/src/syncMain.c

@@ -262,7 +262,7 @@ int32_t syncReconfig(int64_t rid, SSyncCfg* pNewCfg) {
   return ret;
 #else
   syncNodeUpdateNewConfigIndex(pSyncNode, pNewCfg);
-  syncNodeDoConfigChange(pSyncNode, pNewCfg, 0);
+  syncNodeDoConfigChange(pSyncNode, pNewCfg, SYNC_INDEX_INVALID);
   taosReleaseRef(tsNodeRefId, pSyncNode->rid);
   return 0;
 #endif

tests/system-test/fulltest.sh

@@ -248,7 +248,7 @@ python3 ./test.py -f 6-cluster/5dnode3mnodeRestartDnodeInsertDataAsync.py -N 5 -
 
 python3 ./test.py -f 6-cluster/5dnode3mnodeAdd1Ddnoe.py -N 6 -M 3 -C 5
 # BUG python3 ./test.py -f 6-cluster/5dnode3mnodeStopInsert.py
-# python3 ./test.py -f 6-cluster/5dnode3mnodeDrop.py -N 5
+python3 ./test.py -f 6-cluster/5dnode3mnodeDrop.py -N 5
 python3 test.py -f 6-cluster/5dnode3mnodeStopConnect.py -N 5 -M 3
 
 python3 ./test.py -f 6-cluster/5dnode3mnodeRecreateMnode.py  -N 5 -M 3