diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index d65d791147ca20bb586ce2553195b2941ed1f607..32b6424ac2ee78fd50c5e8541b30e158150ca613 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -1259,11 +1259,9 @@ void syncNodeStart(SSyncNode* pSyncNode) {
     syncNodeBecomeFollower(pSyncNode, "first start");
   }
 
-  if (syncNodeIsMnode(pSyncNode)) {
-    int32_t ret = 0;
-    ret = syncNodeStartPingTimer(pSyncNode);
-    ASSERT(ret == 0);
-  }
+  int32_t ret = 0;
+  ret = syncNodeStartPingTimer(pSyncNode);
+  ASSERT(ret == 0);
 }
 
 void syncNodeStartStandBy(SSyncNode* pSyncNode) {
@@ -1276,11 +1274,9 @@ void syncNodeStartStandBy(SSyncNode* pSyncNode) {
   int32_t ret = syncNodeRestartElectTimer(pSyncNode, electMS);
   ASSERT(ret == 0);
 
-  if (pSyncNode->vgId == 1) {
-    int32_t ret = 0;
-    ret = syncNodeStartPingTimer(pSyncNode);
-    ASSERT(ret == 0);
-  }
+  ret = 0;
+  ret = syncNodeStartPingTimer(pSyncNode);
+  ASSERT(ret == 0);
 }
 
 void syncNodeClose(SSyncNode* pSyncNode) {
diff --git a/source/libs/sync/src/syncReplication.c b/source/libs/sync/src/syncReplication.c
index 0ce1f5989a3945bcdab37407ad0ca31350281542..e7b712acc98e985edd67250534541d690d6d568a 100644
--- a/source/libs/sync/src/syncReplication.c
+++ b/source/libs/sync/src/syncReplication.c
@@ -55,7 +55,12 @@ int32_t syncNodeReplicateOne(SSyncNode* pSyncNode, SRaftId* pDestId) {
   // maybe start snapshot
   SyncIndex logStartIndex = pSyncNode->pLogStore->syncLogBeginIndex(pSyncNode->pLogStore);
   SyncIndex logEndIndex = pSyncNode->pLogStore->syncLogEndIndex(pSyncNode->pLogStore);
-  if (nextIndex < logStartIndex || nextIndex > logEndIndex) {
+  if (nextIndex < logStartIndex || nextIndex - 1 > logEndIndex) {
+    char logBuf[128];
+    snprintf(logBuf, sizeof(logBuf), "start snapshot for next-index:%ld, start:%ld, end:%ld", nextIndex, logStartIndex,
+             logEndIndex);
+    syncNodeEventLog(pSyncNode, logBuf);
+
     // start snapshot
     int32_t code = syncNodeStartSnapshot(pSyncNode, pDestId);
     ASSERT(code == 0);
@@ -128,12 +133,12 @@ int32_t syncNodeReplicateOne(SSyncNode* pSyncNode, SRaftId* pDestId) {
 }
 
 int32_t syncNodeReplicate(SSyncNode* pSyncNode) {
-  syncNodeEventLog(pSyncNode, "do replicate");
-
   if (pSyncNode->state != TAOS_SYNC_STATE_LEADER) {
     return -1;
   }
 
+  syncNodeEventLog(pSyncNode, "do replicate");
+
   int32_t ret = 0;
   for (int i = 0; i < pSyncNode->peersNum; ++i) {
     SRaftId* pDestId = &(pSyncNode->peersId[i]);
@@ -170,7 +175,17 @@ int32_t syncNodeMaybeSendAppendEntries(SSyncNode* pSyncNode, const SRaftId* dest
   int32_t ret = 0;
   if (syncNodeNeedSendAppendEntries(pSyncNode, destRaftId, pMsg)) {
     ret = syncNodeSendAppendEntries(pSyncNode, destRaftId, pMsg);
+
+  } else {
+    char    logBuf[128];
+    char    host[64];
+    int16_t port;
+    syncUtilU642Addr(destRaftId->addr, host, sizeof(host), &port);
+
+    snprintf(logBuf, sizeof(logBuf), "do not repcate to %s:%d for index:%ld", host, port, pMsg->prevLogIndex + 1);
+    syncNodeEventLog(pSyncNode, logBuf);
   }
+
   return ret;
 }
 
diff --git a/source/libs/sync/src/syncTimeout.c b/source/libs/sync/src/syncTimeout.c
index 62a81133f30bf1e3e23839be15b53392c780c412..87368cb45c2a411c7f24c7b5e582b5352b1f31dc 100644
--- a/source/libs/sync/src/syncTimeout.c
+++ b/source/libs/sync/src/syncTimeout.c
@@ -60,6 +60,9 @@ static void syncNodeCleanConfigIndex(SSyncNode* ths) {
 int32_t syncNodeTimerRoutine(SSyncNode* ths) {
   syncNodeEventLog(ths, "timer routines");
 
+  // timer replicate
+  syncNodeReplicate(ths);
+
   if (syncNodeIsMnode(ths)) {
     syncNodeCleanConfigIndex(ths);
   }