diff --git a/source/libs/sync/src/syncEnv.c b/source/libs/sync/src/syncEnv.c
index e67439f8feae8601e75e0c8df2dcc82aced32a86..c92af0dd427f3af746da8d6876e9df127cf10990 100644
--- a/source/libs/sync/src/syncEnv.c
+++ b/source/libs/sync/src/syncEnv.c
@@ -35,8 +35,9 @@ bool syncEnvIsStart() {
 }
 
 int32_t syncEnvStart() {
-  int32_t ret = 0;
-  taosSeedRand(taosGetTimestampSec());
+  int32_t  ret = 0;
+  uint32_t seed = (uint32_t)(taosGetTimestampNs() & 0x00000000FFFFFFFF);
+  taosSeedRand(seed);
   // gSyncEnv = doSyncEnvStart(gSyncEnv);
   gSyncEnv = doSyncEnvStart();
   assert(gSyncEnv != NULL);
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index 33e7a8241f92f2865e5d1e1a209237dac8c54693..482a622398247188e1fa55492090408822976ca8 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -2290,7 +2290,7 @@ static int32_t syncNodeConfigChangeFinish(SSyncNode* ths, SRpcMsg* pRpcMsg, SSyn
     ths->pFsm->FpReConfigCb(ths->pFsm, pRpcMsg, cbMeta);
   }
 
-  // update changing
+  // clear changing
   ths->changing = false;
 
   char  tmpbuf[512];
@@ -2309,6 +2309,9 @@ static int32_t syncNodeConfigChangeFinish(SSyncNode* ths, SRpcMsg* pRpcMsg, SSyn
 
 static int32_t syncNodeConfigChange(SSyncNode* ths, SRpcMsg* pRpcMsg, SSyncRaftEntry* pEntry,
                                     SyncReconfigFinish* pFinish) {
+  // set changing
+  ths->changing = true;
+
   // old config
   SSyncCfg oldSyncCfg = ths->pRaftCfg->cfg;