diff --git a/source/libs/sync/inc/syncEnv.h b/source/libs/sync/inc/syncEnv.h
index 7e60822a28..44d0efb033 100644
--- a/source/libs/sync/inc/syncEnv.h
+++ b/source/libs/sync/inc/syncEnv.h
@@ -29,6 +29,7 @@ extern "C" {
 #include "ttimer.h"
 
 #define TIMER_MAX_MS 0x7FFFFFFF
+#define PING_TIMER_MS 1000
 
 typedef struct SSyncEnv {
   tmr_h pEnvTickTimer;
diff --git a/source/libs/sync/inc/syncInt.h b/source/libs/sync/inc/syncInt.h
index 15ed5503eb..0ee33f0912 100644
--- a/source/libs/sync/inc/syncInt.h
+++ b/source/libs/sync/inc/syncInt.h
@@ -131,6 +131,7 @@ typedef struct SSyncNode {
   // raft algorithm
   SSyncFSM* pFsm;
   int32_t   quorum;
+  SRaftId   leaderCache;
 
   // life cycle
   int32_t refCount;
@@ -153,9 +154,11 @@ typedef struct SSyncNode {
   SyncIndex      commitIndex;
 
   // timer
-  tmr_h             pPingTimer;
-  int32_t           pingTimerMS;
-  uint8_t           pingTimerEnable;
+  tmr_h   pPingTimer;
+  int32_t pingTimerMS;
+  // uint8_t           pingTimerEnable;
+  uint64_t          pingTimerLogicClock;
+  uint64_t          pingTimerLogicClockUser;
   TAOS_TMR_CALLBACK FpPingTimer;  // Timer Fp
   uint64_t          pingTimerCounter;
 
@@ -193,18 +196,16 @@ int32_t syncNodeStopPingTimer(SSyncNode* pSyncNode);
 
 int32_t syncNodeStartElectTimer(SSyncNode* pSyncNode);
 int32_t syncNodeStopElectTimer(SSyncNode* pSyncNode);
-int32_t syncNodeResetElectTimer(SSyncNode* pSyncNode, int32_t ms);
 
 int32_t syncNodeStartHeartbeatTimer(SSyncNode* pSyncNode);
 int32_t syncNodeStopHeartbeatTimer(SSyncNode* pSyncNode);
-int32_t syncNodeResetHeartbeatTimer(SSyncNode* pSyncNode, int32_t ms);
 
-void syncNodeBecomeFollower(SSyncNode* pSyncNode);
-void syncNodeBecomeLeader(SSyncNode* pSyncNode);
-void syncNodeFollower2Candidate(SSyncNode* pSyncNode);
-void syncNodeCandidate2Leader(SSyncNode* pSyncNode);
-void syncNodeLeader2Follower(SSyncNode* pSyncNode);
-void syncNodeCandidate2Follower(SSyncNode* pSyncNode);
+int32_t syncNodeRequestVote(SSyncNode* ths, const SyncRequestVote* pMsg);
+int32_t syncNodeOnRequestVoteCb(SSyncNode* ths, SyncRequestVote* pMsg);
+int32_t syncNodeOnRequestVoteReplyCb(SSyncNode* ths, SyncRequestVoteReply* pMsg);
+int32_t syncNodeAppendEntries(SSyncNode* ths, const SyncAppendEntries* pMsg);
+int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg);
+int32_t syncNodeOnAppendEntriesReplyCb(SSyncNode* ths, SyncAppendEntriesReply* pMsg);
 
 #ifdef __cplusplus
 }
diff --git a/source/libs/sync/inc/syncMessage.h b/source/libs/sync/inc/syncMessage.h
index b022044528..95135d161b 100644
--- a/source/libs/sync/inc/syncMessage.h
+++ b/source/libs/sync/inc/syncMessage.h
@@ -30,7 +30,7 @@ extern "C" {
 
 // encode as uint32
 typedef enum ESyncMessageType {
-  SYNC_UNKNOWN = 77,
+  SYNC_UNKNOWN = 9999,
   SYNC_TIMEOUT = 99,
   SYNC_PING = 101,
   SYNC_PING_REPLY = 103,
@@ -52,13 +52,13 @@ typedef enum ESyncTimeoutType {
   SYNC_TIMEOUT_PING = 100,
   SYNC_TIMEOUT_ELECTION,
   SYNC_TIMEOUT_HEARTBEAT,
-
 } ESyncTimeoutType;
 
 typedef struct SyncTimeout {
   uint32_t         bytes;
   uint32_t         msgType;
   ESyncTimeoutType timeoutType;
+  uint64_t         logicClock;
   void*            data;
 } SyncTimeout;
 
@@ -69,7 +69,7 @@ void         syncTimeoutDeserialize(const char* buf, uint32_t len, SyncTimeout*
 void         syncTimeout2RpcMsg(const SyncTimeout* pMsg, SRpcMsg* pRpcMsg);
 void         syncTimeoutFromRpcMsg(const SRpcMsg* pRpcMsg, SyncTimeout* pMsg);
 cJSON*       syncTimeout2Json(const SyncTimeout* pMsg);
-SyncTimeout* syncTimeoutBuild2(ESyncTimeoutType timeoutType, void* data);
+SyncTimeout* syncTimeoutBuild2(ESyncTimeoutType timeoutType, uint64_t logicClock, void* data);
 
 // ---------------------------------------------
 typedef struct SyncPing {
diff --git a/source/libs/sync/inc/syncRequestVote.h b/source/libs/sync/inc/syncRequestVote.h
index c2eca55151..4fb2193010 100644
--- a/source/libs/sync/inc/syncRequestVote.h
+++ b/source/libs/sync/inc/syncRequestVote.h
@@ -28,10 +28,6 @@ extern "C" {
 #include "syncRaft.h"
 #include "taosdef.h"
 
-void requestVote(SRaft *pRaft, const SyncRequestVote *pMsg);
-
-void onRequestVote(SRaft *pRaft, const SyncRequestVote *pMsg);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/libs/sync/inc/syncRequestVoteReply.h b/source/libs/sync/inc/syncRequestVoteReply.h
index 38068dd0e2..21fb61f85f 100644
--- a/source/libs/sync/inc/syncRequestVoteReply.h
+++ b/source/libs/sync/inc/syncRequestVoteReply.h
@@ -28,8 +28,6 @@ extern "C" {
 #include "syncRaft.h"
 #include "taosdef.h"
 
-void onRequestVoteReply(SRaft *pRaft, const SyncRequestVoteReply *pMsg);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/libs/sync/src/syncAppendEntries.c b/source/libs/sync/src/syncAppendEntries.c
index 2b9c59ec92..f3045c3180 100644
--- a/source/libs/sync/src/syncAppendEntries.c
+++ b/source/libs/sync/src/syncAppendEntries.c
@@ -15,7 +15,7 @@
 
 #include "syncAppendEntries.h"
 
-void appendEntries(SRaft *pRaft, const SyncAppendEntries *pMsg) {
+int32_t syncNodeAppendEntries(SSyncNode* ths, const SyncAppendEntries* pMsg) {
   // TLA+ Spec
   // AppendEntries(i, j) ==
   //    /\ i /= j
@@ -42,7 +42,7 @@ void appendEntries(SRaft *pRaft, const SyncAppendEntries *pMsg) {
   //    /\ UNCHANGED <<serverVars, candidateVars, leaderVars, logVars>>
 }
 
-void onAppendEntries(SRaft *pRaft, const SyncAppendEntries *pMsg) {
+int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
   // TLA+ Spec
   // HandleAppendEntriesRequest(i, j, m) ==
   //    LET logOk == \/ m.mprevLogIndex = 0
diff --git a/source/libs/sync/src/syncAppendEntriesReply.c b/source/libs/sync/src/syncAppendEntriesReply.c
index 05734237b9..81c9ea233b 100644
--- a/source/libs/sync/src/syncAppendEntriesReply.c
+++ b/source/libs/sync/src/syncAppendEntriesReply.c
@@ -15,7 +15,7 @@
 
 #include "syncAppendEntriesReply.h"
 
-void onAppendEntriesReply(SRaft *pRaft, const SyncAppendEntriesReply *pMsg) {
+int32_t syncNodeOnAppendEntriesReplyCb(SSyncNode* ths, SyncAppendEntriesReply* pMsg) {
   // TLA+ Spec
   // HandleAppendEntriesResponse(i, j, m) ==
   //    /\ m.mterm = currentTerm[i]
diff --git a/source/libs/sync/src/syncIO.c b/source/libs/sync/src/syncIO.c
index 25775bec76..3250d4c303 100644
--- a/source/libs/sync/src/syncIO.c
+++ b/source/libs/sync/src/syncIO.c
@@ -80,7 +80,7 @@ int32_t syncIOSendMsg(void *clientRpc, const SEpSet *pEpSet, SRpcMsg *pMsg) {
       pMsg->msgType, pMsg->contLen);
   {
     cJSON *pJson = syncRpcMsg2Json(pMsg);
-    char  *serialized = cJSON_Print(pJson);
+    char * serialized = cJSON_Print(pJson);
     sTrace("process syncMessage send: pMsg:%s ", serialized);
     free(serialized);
     cJSON_Delete(pJson);
@@ -211,7 +211,7 @@ static void *syncIOConsumerFunc(void *param) {
   SSyncIO *io = param;
 
   STaosQall *qall;
-  SRpcMsg   *pRpcMsg, rpcMsg;
+  SRpcMsg *  pRpcMsg, rpcMsg;
   int        type;
 
   qall = taosAllocateQall();
@@ -245,6 +245,42 @@ static void *syncIOConsumerFunc(void *param) {
           syncPingReplyDestroy(pSyncMsg);
         }
 
+      } else if (pRpcMsg->msgType == SYNC_REQUEST_VOTE) {
+        if (io->FpOnSyncRequestVote) {
+          SyncRequestVote *pSyncMsg;
+          pSyncMsg = syncRequestVoteBuild(pRpcMsg->contLen);
+          syncRequestVoteFromRpcMsg(pRpcMsg, pSyncMsg);
+          io->FpOnSyncRequestVote(io->pSyncNode, pSyncMsg);
+          syncRequestVoteDestroy(pSyncMsg);
+        }
+
+      } else if (pRpcMsg->msgType == SYNC_REQUEST_VOTE_REPLY) {
+        if (io->FpOnSyncRequestVoteReply) {
+          SyncRequestVoteReply *pSyncMsg;
+          pSyncMsg = SyncRequestVoteReplyBuild();
+          syncRequestVoteReplyFromRpcMsg(pRpcMsg, pSyncMsg);
+          io->FpOnSyncRequestVoteReply(io->pSyncNode, pSyncMsg);
+          syncRequestVoteReplyDestroy(pSyncMsg);
+        }
+
+      } else if (pRpcMsg->msgType == SYNC_APPEND_ENTRIES) {
+        if (io->FpOnSyncAppendEntries) {
+          SyncAppendEntries *pSyncMsg;
+          pSyncMsg = syncAppendEntriesBuild(pRpcMsg->contLen);
+          syncAppendEntriesFromRpcMsg(pRpcMsg, pSyncMsg);
+          io->FpOnSyncAppendEntries(io->pSyncNode, pSyncMsg);
+          syncAppendEntriesDestroy(pSyncMsg);
+        }
+
+      } else if (pRpcMsg->msgType == SYNC_APPEND_ENTRIES_REPLY) {
+        if (io->FpOnSyncAppendEntriesReply) {
+          SyncAppendEntriesReply *pSyncMsg;
+          pSyncMsg = syncAppendEntriesReplyBuild();
+          syncAppendEntriesReplyFromRpcMsg(pRpcMsg, pSyncMsg);
+          io->FpOnSyncAppendEntriesReply(io->pSyncNode, pSyncMsg);
+          syncAppendEntriesReplyDestroy(pSyncMsg);
+        }
+
       } else if (pRpcMsg->msgType == SYNC_TIMEOUT) {
         if (io->FpOnSyncTimeout != NULL) {
           SyncTimeout *pSyncMsg;
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index 6a0663dd57..ed7ab23b0c 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -31,16 +31,19 @@ static void syncNodeEqElectTimer(void* param, void* tmrId);
 static void syncNodeEqHeartbeatTimer(void* param, void* tmrId);
 
 static int32_t syncNodePing(SSyncNode* pSyncNode, const SRaftId* destRaftId, SyncPing* pMsg);
-static int32_t syncNodeRequestVote(SSyncNode* ths, const SyncRequestVote* pMsg);
-static int32_t syncNodeAppendEntries(SSyncNode* ths, const SyncAppendEntries* pMsg);
-
 static int32_t syncNodeOnPingCb(SSyncNode* ths, SyncPing* pMsg);
 static int32_t syncNodeOnPingReplyCb(SSyncNode* ths, SyncPingReply* pMsg);
-static int32_t syncNodeOnRequestVoteCb(SSyncNode* ths, SyncRequestVote* pMsg);
-static int32_t syncNodeOnRequestVoteReplyCb(SSyncNode* ths, SyncRequestVoteReply* pMsg);
-static int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg);
-static int32_t syncNodeOnAppendEntriesReplyCb(SSyncNode* ths, SyncAppendEntriesReply* pMsg);
 static int32_t syncNodeOnTimeoutCb(SSyncNode* ths, SyncTimeout* pMsg);
+
+static void syncNodeBecomeFollower(SSyncNode* pSyncNode);
+static void syncNodeBecomeLeader(SSyncNode* pSyncNode);
+static void syncNodeFollower2Candidate(SSyncNode* pSyncNode);
+static void syncNodeCandidate2Leader(SSyncNode* pSyncNode);
+static void syncNodeLeader2Follower(SSyncNode* pSyncNode);
+static void syncNodeCandidate2Follower(SSyncNode* pSyncNode);
+
+void syncNodeRequestVotePeers(SSyncNode* pSyncNode);
+void syncNodeAppendEntriesPeers(SSyncNode* pSyncNode);
 // ---------------------------------
 
 int32_t syncInit() {
@@ -96,8 +99,9 @@ SSyncNode* syncNodeOpen(const SSyncInfo* pSyncInfo) {
   syncUtilnodeInfo2raftId(&pSyncNode->me, pSyncNode->vgId, &pSyncNode->raftId);
 
   pSyncNode->pPingTimer = NULL;
-  pSyncNode->pingTimerMS = 1000;
-  atomic_store_8(&pSyncNode->pingTimerEnable, 0);
+  pSyncNode->pingTimerMS = PING_TIMER_MS;
+  atomic_store_64(&pSyncNode->pingTimerLogicClock, 0);
+  atomic_store_64(&pSyncNode->pingTimerLogicClockUser, 0);
   pSyncNode->FpPingTimer = syncNodeEqPingTimer;
   pSyncNode->pingTimerCounter = 0;
 
@@ -151,6 +155,9 @@ void syncNodePingSelf(SSyncNode* pSyncNode) {
 }
 
 int32_t syncNodeStartPingTimer(SSyncNode* pSyncNode) {
+  atomic_store_64(&pSyncNode->pingTimerLogicClock, pSyncNode->pingTimerLogicClockUser);
+  pSyncNode->pingTimerMS = PING_TIMER_MS;
+
   if (pSyncNode->pPingTimer == NULL) {
     pSyncNode->pPingTimer =
         taosTmrStart(pSyncNode->FpPingTimer, pSyncNode->pingTimerMS, pSyncNode, gSyncEnv->pTimerManager);
@@ -159,12 +166,11 @@ int32_t syncNodeStartPingTimer(SSyncNode* pSyncNode) {
                  &pSyncNode->pPingTimer);
   }
 
-  atomic_store_8(&pSyncNode->pingTimerEnable, 1);
   return 0;
 }
 
 int32_t syncNodeStopPingTimer(SSyncNode* pSyncNode) {
-  atomic_store_8(&pSyncNode->pingTimerEnable, 0);
+  atomic_add_fetch_64(&pSyncNode->pingTimerLogicClockUser, 1);
   pSyncNode->pingTimerMS = TIMER_MAX_MS;
   return 0;
 }
@@ -188,8 +194,6 @@ int32_t syncNodeStopElectTimer(SSyncNode* pSyncNode) {
   return 0;
 }
 
-int32_t syncNodeResetElectTimer(SSyncNode* pSyncNode, int32_t ms) { return 0; }
-
 int32_t syncNodeStartHeartbeatTimer(SSyncNode* pSyncNode) {
   if (pSyncNode->pHeartbeatTimer == NULL) {
     pSyncNode->pHeartbeatTimer =
@@ -209,20 +213,6 @@ int32_t syncNodeStopHeartbeatTimer(SSyncNode* pSyncNode) {
   return 0;
 }
 
-int32_t syncNodeResetHeartbeatTimer(SSyncNode* pSyncNode, int32_t ms) { return 0; }
-
-void syncNodeBecomeFollower(SSyncNode* pSyncNode) {}
-
-void syncNodeBecomeLeader(SSyncNode* pSyncNode) {}
-
-void syncNodeFollower2Candidate(SSyncNode* pSyncNode) {}
-
-void syncNodeCandidate2Leader(SSyncNode* pSyncNode) {}
-
-void syncNodeLeader2Follower(SSyncNode* pSyncNode) {}
-
-void syncNodeCandidate2Follower(SSyncNode* pSyncNode) {}
-
 // ------ local funciton ---------
 static int32_t syncNodePing(SSyncNode* pSyncNode, const SRaftId* destRaftId, SyncPing* pMsg) {
   sTrace("syncNodePing pSyncNode:%p ", pSyncNode);
@@ -252,16 +242,6 @@ static int32_t syncNodePing(SSyncNode* pSyncNode, const SRaftId* destRaftId, Syn
   return ret;
 }
 
-static int32_t syncNodeRequestVote(SSyncNode* ths, const SyncRequestVote* pMsg) {
-  int32_t ret = 0;
-  return ret;
-}
-
-static int32_t syncNodeAppendEntries(SSyncNode* ths, const SyncAppendEntries* pMsg) {
-  int32_t ret = 0;
-  return ret;
-}
-
 static int32_t syncNodeSendMsgById(const SRaftId* destRaftId, SSyncNode* pSyncNode, SRpcMsg* pMsg) {
   SEpSet epSet;
   syncUtilraftId2EpSet(destRaftId, &epSet);
@@ -311,26 +291,6 @@ static int32_t syncNodeOnPingReplyCb(SSyncNode* ths, SyncPingReply* pMsg) {
   return ret;
 }
 
-static int32_t syncNodeOnRequestVoteCb(SSyncNode* ths, SyncRequestVote* pMsg) {
-  int32_t ret = 0;
-  return ret;
-}
-
-static int32_t syncNodeOnRequestVoteReplyCb(SSyncNode* ths, SyncRequestVoteReply* pMsg) {
-  int32_t ret = 0;
-  return ret;
-}
-
-static int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
-  int32_t ret = 0;
-  return ret;
-}
-
-static int32_t syncNodeOnAppendEntriesReplyCb(SSyncNode* ths, SyncAppendEntriesReply* pMsg) {
-  int32_t ret = 0;
-  return ret;
-}
-
 static int32_t syncNodeOnTimeoutCb(SSyncNode* ths, SyncTimeout* pMsg) {
   int32_t ret = 0;
   sTrace("<-- syncNodeOnTimeoutCb -->");
@@ -344,7 +304,7 @@ static int32_t syncNodeOnTimeoutCb(SSyncNode* ths, SyncTimeout* pMsg) {
   }
 
   if (pMsg->timeoutType == SYNC_TIMEOUT_PING) {
-    if (atomic_load_8(&ths->pingTimerEnable)) {
+    if (atomic_load_64(&ths->pingTimerLogicClockUser) <= pMsg->logicClock) {
       ++(ths->pingTimerCounter);
       syncNodePingAll(ths);
     }
@@ -359,11 +319,13 @@ static int32_t syncNodeOnTimeoutCb(SSyncNode* ths, SyncTimeout* pMsg) {
 
 static void syncNodeEqPingTimer(void* param, void* tmrId) {
   SSyncNode* pSyncNode = (SSyncNode*)param;
-  if (atomic_load_8(&pSyncNode->pingTimerEnable)) {
+  if (atomic_load_64(&pSyncNode->pingTimerLogicClockUser) <= atomic_load_64(&pSyncNode->pingTimerLogicClock)) {
     // pSyncNode->pingTimerMS += 100;
 
-    SyncTimeout* pSyncMsg = syncTimeoutBuild2(SYNC_TIMEOUT_PING, pSyncNode);
-    SRpcMsg      rpcMsg;
+    SyncTimeout* pSyncMsg =
+        syncTimeoutBuild2(SYNC_TIMEOUT_PING, atomic_load_64(&pSyncNode->pingTimerLogicClock), pSyncNode);
+
+    SRpcMsg rpcMsg;
     syncTimeout2RpcMsg(pSyncMsg, &rpcMsg);
     pSyncNode->FpEqMsg(pSyncNode->queue, &rpcMsg);
     syncTimeoutDestroy(pSyncMsg);
@@ -371,10 +333,49 @@ static void syncNodeEqPingTimer(void* param, void* tmrId) {
     taosTmrReset(syncNodeEqPingTimer, pSyncNode->pingTimerMS, pSyncNode, &gSyncEnv->pTimerManager,
                  &pSyncNode->pPingTimer);
   } else {
-    sTrace("syncNodeEqPingTimer: pingTimerEnable:%u ", pSyncNode->pingTimerEnable);
+    sTrace("syncNodeEqPingTimer: pingTimerLogicClock:%lu, pingTimerLogicClockUser:%lu", pSyncNode->pingTimerLogicClock,
+           pSyncNode->pingTimerLogicClockUser);
   }
 }
 
 static void syncNodeEqElectTimer(void* param, void* tmrId) {}
 
-static void syncNodeEqHeartbeatTimer(void* param, void* tmrId) {}
\ No newline at end of file
+static void syncNodeEqHeartbeatTimer(void* param, void* tmrId) {}
+
+static void syncNodeBecomeFollower(SSyncNode* pSyncNode) {
+  if (pSyncNode->state == TAOS_SYNC_STATE_LEADER) {
+    pSyncNode->leaderCache.addr = 0;
+    pSyncNode->leaderCache.vgId = 0;
+  }
+
+  syncNodeStopHeartbeatTimer(pSyncNode);
+  syncNodeStartElectTimer(pSyncNode);
+}
+
+static void syncNodeBecomeLeader(SSyncNode* pSyncNode) {
+  pSyncNode->state = TAOS_SYNC_STATE_LEADER;
+  pSyncNode->leaderCache = pSyncNode->raftId;
+
+  // next Index +=1
+  // match Index = 0;
+
+  syncNodeStopElectTimer(pSyncNode);
+  syncNodeStartHeartbeatTimer(pSyncNode);
+
+  // appendEntries;
+}
+
+static void syncNodeFollower2Candidate(SSyncNode* pSyncNode) {
+  assert(pSyncNode->state == TAOS_SYNC_STATE_FOLLOWER);
+  pSyncNode->state = TAOS_SYNC_STATE_CANDIDATE;
+}
+
+static void syncNodeCandidate2Leader(SSyncNode* pSyncNode) {}
+
+static void syncNodeLeader2Follower(SSyncNode* pSyncNode) {}
+
+static void syncNodeCandidate2Follower(SSyncNode* pSyncNode) {}
+
+void syncNodeRequestVotePeers(SSyncNode* pSyncNode) {}
+
+void syncNodeAppendEntriesPeers(SSyncNode* pSyncNode) {}
\ No newline at end of file
diff --git a/source/libs/sync/src/syncMessage.c b/source/libs/sync/src/syncMessage.c
index f1434947a1..d1b4a6a2c6 100644
--- a/source/libs/sync/src/syncMessage.c
+++ b/source/libs/sync/src/syncMessage.c
@@ -123,6 +123,8 @@ cJSON* syncTimeout2Json(const SyncTimeout* pMsg) {
   cJSON_AddNumberToObject(pRoot, "bytes", pMsg->bytes);
   cJSON_AddNumberToObject(pRoot, "msgType", pMsg->msgType);
   cJSON_AddNumberToObject(pRoot, "timeoutType", pMsg->timeoutType);
+  snprintf(u64buf, sizeof(u64buf), "%lu", pMsg->logicClock);
+  cJSON_AddStringToObject(pRoot, "logicClock", u64buf);
   snprintf(u64buf, sizeof(u64buf), "%p", pMsg->data);
   cJSON_AddStringToObject(pRoot, "data", u64buf);
 
@@ -131,9 +133,10 @@ cJSON* syncTimeout2Json(const SyncTimeout* pMsg) {
   return pJson;
 }
 
-SyncTimeout* syncTimeoutBuild2(ESyncTimeoutType timeoutType, void* data) {
+SyncTimeout* syncTimeoutBuild2(ESyncTimeoutType timeoutType, uint64_t logicClock, void* data) {
   SyncTimeout* pMsg = syncTimeoutBuild();
   pMsg->timeoutType = timeoutType;
+  pMsg->logicClock = logicClock;
   pMsg->data = data;
   return pMsg;
 }
diff --git a/source/libs/sync/src/syncRequestVote.c b/source/libs/sync/src/syncRequestVote.c
index 7aee47b8e4..38eaea26ac 100644
--- a/source/libs/sync/src/syncRequestVote.c
+++ b/source/libs/sync/src/syncRequestVote.c
@@ -15,7 +15,7 @@
 
 #include "syncRequestVote.h"
 
-void requestVote(SRaft *pRaft, const SyncRequestVote *pMsg) {
+int32_t syncNodeRequestVote(SSyncNode* ths, const SyncRequestVote* pMsg) {
   // TLA+ Spec
   // RequestVote(i, j) ==
   //    /\ state[i] = Candidate
@@ -29,7 +29,7 @@ void requestVote(SRaft *pRaft, const SyncRequestVote *pMsg) {
   //    /\ UNCHANGED <<serverVars, candidateVars, leaderVars, logVars>>
 }
 
-void onRequestVote(SRaft *pRaft, const SyncRequestVote *pMsg) {
+int32_t syncNodeOnRequestVoteCb(SSyncNode* ths, SyncRequestVote* pMsg) {
   // TLA+ Spec
   // HandleRequestVoteRequest(i, j, m) ==
   //    LET logOk == \/ m.mlastLogTerm > LastTerm(log[i])
diff --git a/source/libs/sync/src/syncRequestVoteReply.c b/source/libs/sync/src/syncRequestVoteReply.c
index a9c88a7975..63bba7c480 100644
--- a/source/libs/sync/src/syncRequestVoteReply.c
+++ b/source/libs/sync/src/syncRequestVoteReply.c
@@ -15,7 +15,7 @@
 
 #include "syncRequestVoteReply.h"
 
-void onRequestVoteReply(SRaft *pRaft, const SyncRequestVoteReply *pMsg) {
+int32_t syncNodeOnRequestVoteReplyCb(SSyncNode* ths, SyncRequestVoteReply* pMsg) {
   // TLA+ Spec
   // HandleRequestVoteResponse(i, j, m) ==
   //    \* This tallies votes even when the current state is not Candidate, but
diff --git a/source/libs/sync/test/CMakeLists.txt b/source/libs/sync/test/CMakeLists.txt
index 4c5f7ffa56..770d1d1bd8 100644
--- a/source/libs/sync/test/CMakeLists.txt
+++ b/source/libs/sync/test/CMakeLists.txt
@@ -9,6 +9,7 @@ add_executable(syncIOSendMsgClientTest "")
 add_executable(syncIOSendMsgServerTest "")
 add_executable(syncRaftStoreTest "")
 add_executable(syncEnqTest "")
+add_executable(syncIndexTest "")
 
 
 target_sources(syncTest
@@ -55,6 +56,10 @@ target_sources(syncEnqTest
     PRIVATE
     "syncEnqTest.cpp"
 )
+target_sources(syncIndexTest
+    PRIVATE
+    "syncIndexTest.cpp"
+)
 
 
 target_include_directories(syncTest
@@ -112,6 +117,11 @@ target_include_directories(syncEnqTest
     "${CMAKE_SOURCE_DIR}/include/libs/sync"
     "${CMAKE_CURRENT_SOURCE_DIR}/../inc"
 )
+target_include_directories(syncIndexTest
+    PUBLIC
+    "${CMAKE_SOURCE_DIR}/include/libs/sync"
+    "${CMAKE_CURRENT_SOURCE_DIR}/../inc"
+)
 
 
 target_link_libraries(syncTest
@@ -158,6 +168,10 @@ target_link_libraries(syncEnqTest
     sync
     gtest_main
 )
+target_link_libraries(syncIndexTest
+    sync
+    gtest_main
+)
 
 
 enable_testing()
diff --git a/source/libs/sync/test/syncIOSendMsgClientTest.cpp b/source/libs/sync/test/syncIOSendMsgClientTest.cpp
index 0d06c4f811..83ac724789 100644
--- a/source/libs/sync/test/syncIOSendMsgClientTest.cpp
+++ b/source/libs/sync/test/syncIOSendMsgClientTest.cpp
@@ -1,5 +1,5 @@
-#include <stdio.h>
 #include <gtest/gtest.h>
+#include <stdio.h>
 #include "syncIO.h"
 #include "syncInt.h"
 #include "syncRaftStore.h"
diff --git a/source/libs/sync/test/syncIOSendMsgServerTest.cpp b/source/libs/sync/test/syncIOSendMsgServerTest.cpp
index 1582e097d3..b0f177962f 100644
--- a/source/libs/sync/test/syncIOSendMsgServerTest.cpp
+++ b/source/libs/sync/test/syncIOSendMsgServerTest.cpp
@@ -1,5 +1,5 @@
-#include <stdio.h>
 #include <gtest/gtest.h>
+#include <stdio.h>
 #include "syncIO.h"
 #include "syncInt.h"
 #include "syncRaftStore.h"
diff --git a/source/libs/sync/test/syncIOSendMsgTest.cpp b/source/libs/sync/test/syncIOSendMsgTest.cpp
index 9b2cfcf1d8..c25ad3b1dd 100644
--- a/source/libs/sync/test/syncIOSendMsgTest.cpp
+++ b/source/libs/sync/test/syncIOSendMsgTest.cpp
@@ -1,5 +1,5 @@
-#include <stdio.h>
 #include <gtest/gtest.h>
+#include <stdio.h>
 #include "syncIO.h"
 #include "syncInt.h"
 #include "syncRaftStore.h"
diff --git a/source/libs/sync/test/syncIOTickPingTest.cpp b/source/libs/sync/test/syncIOTickPingTest.cpp
index 42b9a73432..777fc035e2 100644
--- a/source/libs/sync/test/syncIOTickPingTest.cpp
+++ b/source/libs/sync/test/syncIOTickPingTest.cpp
@@ -1,5 +1,5 @@
-#include <stdio.h>
 #include <gtest/gtest.h>
+#include <stdio.h>
 #include "syncIO.h"
 #include "syncInt.h"
 #include "syncRaftStore.h"
diff --git a/source/libs/sync/test/syncIOTickQTest.cpp b/source/libs/sync/test/syncIOTickQTest.cpp
index 3d31c596bf..5615058cc3 100644
--- a/source/libs/sync/test/syncIOTickQTest.cpp
+++ b/source/libs/sync/test/syncIOTickQTest.cpp
@@ -1,5 +1,5 @@
-#include <stdio.h>
 #include <gtest/gtest.h>
+#include <stdio.h>
 #include "syncIO.h"
 #include "syncInt.h"
 #include "syncRaftStore.h"
diff --git a/source/libs/sync/test/syncIndexTest.cpp b/source/libs/sync/test/syncIndexTest.cpp
new file mode 100644
index 0000000000..ece58fb9b0
--- /dev/null
+++ b/source/libs/sync/test/syncIndexTest.cpp
@@ -0,0 +1,63 @@
+#include <gtest/gtest.h>
+#include <stdio.h>
+#include "syncIO.h"
+#include "syncInt.h"
+#include "syncRaftStore.h"
+
+void print(SHashObj *pNextIndex) {
+  printf("----------------\n");
+  uint64_t *p = (uint64_t *)taosHashIterate(pNextIndex, NULL);
+  while (p) {
+    printf("%lu \n", *p);
+    p = (uint64_t *)taosHashIterate(pNextIndex, p);
+  }
+}
+
+int main() {
+  // taosInitLog((char *)"syncTest.log", 100000, 10);
+  tsAsyncLog = 0;
+  sDebugFlag = 143 + 64;
+
+  sTrace("sync log test: trace");
+  sDebug("sync log test: debug");
+  sInfo("sync log test: info");
+  sWarn("sync log test: warn");
+  sError("sync log test: error");
+  sFatal("sync log test: fatal");
+
+  SRaftId me;
+  SRaftId peer1;
+  SRaftId peer2;
+
+  me.addr = 0;
+  me.vgId = 99;
+  peer1.addr = 1;
+  peer1.vgId = 99;
+  peer2.addr = 2;
+  peer2.vgId = 99;
+
+  uint64_t  index;
+  SHashObj *pNextIndex =
+      taosHashInit(sizeof(SRaftId), taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_NO_LOCK);
+
+  index = 1000;
+  taosHashPut(pNextIndex, &me, sizeof(me), &index, sizeof(index));
+  index = 1001;
+  taosHashPut(pNextIndex, &peer1, sizeof(peer1), &index, sizeof(index));
+  index = 1002;
+  taosHashPut(pNextIndex, &peer2, sizeof(peer2), &index, sizeof(index));
+
+  print(pNextIndex);
+
+  SRaftId find;
+  find = peer1;
+  uint64_t *p;
+  p = (uint64_t *)taosHashGet(pNextIndex, &find, sizeof(find));
+  (*p) += 900;
+
+  print(pNextIndex);
+
+  taosHashCleanup(pNextIndex);
+
+  return 0;
+}
diff --git a/source/libs/sync/test/syncPingTest.cpp b/source/libs/sync/test/syncPingTest.cpp
index 77413a713b..4e5f7b78b5 100644
--- a/source/libs/sync/test/syncPingTest.cpp
+++ b/source/libs/sync/test/syncPingTest.cpp
@@ -84,6 +84,17 @@ int main(int argc, char** argv) {
   assert(ret == 0);
 
   taosMsleep(10000);
+
+  ret = syncNodeStopPingTimer(pSyncNode);
+  assert(ret == 0);
+
+  taosMsleep(10000);
+
+  ret = syncNodeStartPingTimer(pSyncNode);
+  assert(ret == 0);
+
+  taosMsleep(10000);
+
   ret = syncNodeStopPingTimer(pSyncNode);
   assert(ret == 0);
 
diff --git a/source/libs/sync/test/syncRaftStoreTest.cpp b/source/libs/sync/test/syncRaftStoreTest.cpp
index 9cfbe5a4ea..447dab0cbc 100644
--- a/source/libs/sync/test/syncRaftStoreTest.cpp
+++ b/source/libs/sync/test/syncRaftStoreTest.cpp
@@ -1,6 +1,6 @@
-#include <stdio.h>
-#include <gtest/gtest.h>
 #include "syncRaftStore.h"
+//#include <gtest/gtest.h>
+#include <stdio.h>
 #include "syncIO.h"
 #include "syncInt.h"
 
diff --git a/source/libs/sync/test/syncTest.cpp b/source/libs/sync/test/syncTest.cpp
index c1c5658aba..1f9f4846cc 100644
--- a/source/libs/sync/test/syncTest.cpp
+++ b/source/libs/sync/test/syncTest.cpp
@@ -1,5 +1,5 @@
-#include <stdio.h>
 #include <gtest/gtest.h>
+#include <stdio.h>
 #include "syncIO.h"
 #include "syncInt.h"
 #include "syncRaftStore.h"