diff --git a/source/libs/sync/inc/syncInt.h b/source/libs/sync/inc/syncInt.h
index 2e71745f61..4100aa0216 100644
--- a/source/libs/sync/inc/syncInt.h
+++ b/source/libs/sync/inc/syncInt.h
@@ -55,6 +55,8 @@ typedef struct SVotesRespond          SVotesRespond;
 typedef struct SSyncIndexMgr          SSyncIndexMgr;
 typedef struct SRaftCfg               SRaftCfg;
 typedef struct SSyncRespMgr           SSyncRespMgr;
+typedef struct SSyncSnapshotSender    SSyncSnapshotSender;
+typedef struct SSyncSnapshotReceiver  SSyncSnapshotReceiver;
 
 typedef struct SSyncNode {
   // init by SSyncInfo
@@ -148,9 +150,11 @@ typedef struct SSyncNode {
   SSyncRespMgr* pSyncRespMgr;
 
   // restore state
-  bool restoreFinish;
   // sem_t      restoreSem;
-  SSnapshot* pSnapshot;
+  bool                   restoreFinish;
+  SSnapshot*             pSnapshot;
+  SSyncSnapshotSender*   pSender;
+  SSyncSnapshotReceiver* pReceiver;
 
 } SSyncNode;
 
diff --git a/source/libs/sync/inc/syncSnapshot.h b/source/libs/sync/inc/syncSnapshot.h
index 104da48616..b3174a4b36 100644
--- a/source/libs/sync/inc/syncSnapshot.h
+++ b/source/libs/sync/inc/syncSnapshot.h
@@ -23,6 +23,7 @@ extern "C" {
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include "cJSON.h"
 #include "syncInt.h"
 #include "taosdef.h"
 
@@ -32,11 +33,14 @@ typedef struct SSyncSnapshotSender {
   void *     pCurrentBlock;
   int32_t    len;
   SSnapshot *pSnapshot;
+  SSyncNode *pSyncNode;
 } SSyncSnapshotSender;
 
-int32_t snapshotSenderStart(SSyncSnapshotSender *pSender);
-int32_t snapshotSenderStop(SSyncSnapshotSender *pSender);
-int32_t snapshotSend(SSyncSnapshotSender *pSender);
+SSyncSnapshotSender *snapshotSenderCreate(SSyncNode *pSyncNode);
+void                 snapshotSenderDestroy(SSyncSnapshotSender *pSender);
+int32_t              snapshotSend(SSyncSnapshotSender *pSender);
+cJSON *              snapshotSender2Json(SSyncSnapshotSender *pSender);
+char *               snapshotSender2Str(SSyncSnapshotSender *pSender);
 
 typedef struct SSyncSnapshotReceiver {
   bool       isStart;
@@ -44,11 +48,14 @@ typedef struct SSyncSnapshotReceiver {
   void *     pCurrentBlock;
   int32_t    len;
   SSnapshot *pSnapshot;
+  SSyncNode *pSyncNode;
 } SSyncSnapshotReceiver;
 
-int32_t snapshotReceiverStart(SSyncSnapshotReceiver *pReceiver);
-int32_t snapshotReceiverStop(SSyncSnapshotReceiver *pReceiver);
-int32_t snapshotReceive(SSyncSnapshotReceiver *pReceiver);
+SSyncSnapshotReceiver *snapshotReceiverCreate(SSyncNode *pSyncNode);
+void                   snapshotReceiverDestroy(SSyncSnapshotReceiver *pReceiver);
+int32_t                snapshotReceive(SSyncSnapshotReceiver *pReceiver);
+cJSON *                snapshotReceiver2Json(SSyncSnapshotReceiver *pReceiver);
+char *                 snapshotReceiver2Str(SSyncSnapshotReceiver *pReceiver);
 
 #ifdef __cplusplus
 }
diff --git a/source/libs/sync/src/syncAppendEntries.c b/source/libs/sync/src/syncAppendEntries.c
index 008bc00dbc..ca34e3ea77 100644
--- a/source/libs/sync/src/syncAppendEntries.c
+++ b/source/libs/sync/src/syncAppendEntries.c
@@ -365,7 +365,7 @@ int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
                 }
 
                 SReConfigCbMeta cbMeta = {0};
-                bool isDrop;
+                bool            isDrop;
 
                 // I am in newConfig
                 if (hit) {
@@ -388,7 +388,7 @@ int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
                 }
 
                 // always call FpReConfigCb
-                if (ths->pFsm->FpReConfigCb != NULL) {     
+                if (ths->pFsm->FpReConfigCb != NULL) {
                   cbMeta.code = 0;
                   cbMeta.currentTerm = ths->pRaftStore->currentTerm;
                   cbMeta.index = pEntry->index;
diff --git a/source/libs/sync/src/syncSnapshot.c b/source/libs/sync/src/syncSnapshot.c
index 5419adee2c..ccb0e6071b 100644
--- a/source/libs/sync/src/syncSnapshot.c
+++ b/source/libs/sync/src/syncSnapshot.c
@@ -15,14 +15,22 @@
 
 #include "syncSnapshot.h"
 
-int32_t snapshotSenderStart(SSyncSnapshotSender *pSender) { return 0; }
+SSyncSnapshotSender *snapshotSenderCreate(SSyncNode *pSyncNode) { return NULL; }
 
-int32_t snapshotSenderStop(SSyncSnapshotSender *pSender) { return 0; }
+void snapshotSenderDestroy(SSyncSnapshotSender *pSender) {}
 
 int32_t snapshotSend(SSyncSnapshotSender *pSender) { return 0; }
 
-int32_t snapshotReceiverStart(SSyncSnapshotReceiver *pReceiver) { return 0; }
+cJSON *snapshotSender2Json(SSyncSnapshotSender *pSender) { return NULL; }
 
-int32_t snapshotReceiverStop(SSyncSnapshotReceiver *pReceiver) { return 0; }
+char *snapshotSender2Str(SSyncSnapshotSender *pSender) { return NULL; }
+
+SSyncSnapshotReceiver *snapshotReceiverCreate(SSyncNode *pSyncNode) { return NULL; }
+
+void snapshotReceiverDestroy(SSyncSnapshotReceiver *pReceiver) {}
 
 int32_t snapshotReceive(SSyncSnapshotReceiver *pReceiver) { return 0; }
+
+cJSON *snapshotReceiver2Json(SSyncSnapshotReceiver *pReceiver) { return NULL; }
+
+char *snapshotReceiver2Str(SSyncSnapshotReceiver *pReceiver) { return NULL; }
diff --git a/source/libs/sync/test/syncConfigChangeTest.cpp b/source/libs/sync/test/syncConfigChangeTest.cpp
index 7efc3f50c0..1755b7a8fd 100644
--- a/source/libs/sync/test/syncConfigChangeTest.cpp
+++ b/source/libs/sync/test/syncConfigChangeTest.cpp
@@ -78,7 +78,8 @@ int32_t GetSnapshotCb(struct SSyncFSM* pFsm, SSnapshot* pSnapshot) {
 void RestoreFinishCb(struct SSyncFSM* pFsm) { sTrace("==callback== ==RestoreFinishCb=="); }
 
 void ReConfigCb(struct SSyncFSM* pFsm, SSyncCfg newCfg, SReConfigCbMeta cbMeta) {
-  sTrace("==callback== ==ReConfigCb== flag:0x%lX, isDrop:%d, index:%ld, code:%d, currentTerm:%lu, term:%lu", cbMeta.flag, cbMeta.isDrop, cbMeta.index, cbMeta.code, cbMeta.currentTerm, cbMeta.term);
+  sTrace("==callback== ==ReConfigCb== flag:0x%lX, isDrop:%d, index:%ld, code:%d, currentTerm:%lu, term:%lu",
+         cbMeta.flag, cbMeta.isDrop, cbMeta.index, cbMeta.code, cbMeta.currentTerm, cbMeta.term);
 }
 
 SSyncFSM* createFsm() {