diff --git a/source/libs/sync/inc/syncRaftStore.h b/source/libs/sync/inc/syncRaftStore.h
index 4cb852f34a..2953066731 100644
--- a/source/libs/sync/inc/syncRaftStore.h
+++ b/source/libs/sync/inc/syncRaftStore.h
@@ -27,6 +27,9 @@ extern "C" {
 #include "syncRaft.h"
 #include "taosdef.h"
 
+void testJson();
+void testJson2();
+
 int32_t currentTerm(SyncTerm *pCurrentTerm);
 
 int32_t persistCurrentTerm(SyncTerm currentTerm);
diff --git a/source/libs/sync/src/syncIO.c b/source/libs/sync/src/syncIO.c
index 8dadd1e492..b657597e9d 100644
--- a/source/libs/sync/src/syncIO.c
+++ b/source/libs/sync/src/syncIO.c
@@ -203,7 +203,7 @@ static int32_t syncIOPing(SSyncIO *io) {
   rpcMsg.pCont = rpcMallocCont(10);
   snprintf(rpcMsg.pCont, 10, "ping");
   rpcMsg.contLen = 10;
-  rpcMsg.handle = io;
+  rpcMsg.handle = NULL;
   rpcMsg.msgType = 1;
 
   rpcSendRequest(io->clientRpc, &io->epSet, &rpcMsg, NULL);
diff --git a/source/libs/sync/src/syncRaftStore.c b/source/libs/sync/src/syncRaftStore.c
index d45e53132c..3c624c5ff7 100644
--- a/source/libs/sync/src/syncRaftStore.c
+++ b/source/libs/sync/src/syncRaftStore.c
@@ -14,8 +14,41 @@
  */
 
 #include "syncRaftStore.h"
+#include "cJSON.h"
 #include "sync.h"
 
+char *serialized;
+
+void testJson() {
+  FileFd raftStoreFd = taosOpenFileReadWrite("raft.store");
+
+  uint64_t currentTerm = 100;
+  uint64_t voteFor = 200;
+
+  cJSON *pRoot = cJSON_CreateObject();
+  cJSON_AddNumberToObject(pRoot, "current_term", currentTerm);
+  cJSON_AddNumberToObject(pRoot, "vote_for", voteFor);
+
+  serialized = cJSON_Print(pRoot);
+  int len = strlen(serialized);
+  printf("serialized: %s \n", serialized);
+
+  taosWriteFile(raftStoreFd, serialized, len);
+  taosCloseFile(raftStoreFd);
+}
+
+void testJson2() {
+  cJSON *pRoot = cJSON_Parse(serialized);
+
+  cJSON   *pCurrentTerm = cJSON_GetObjectItem(pRoot, "current_term");
+  uint64_t currentTerm = pCurrentTerm->valueint;
+
+  cJSON   *pVoteFor = cJSON_GetObjectItem(pRoot, "vote_for");
+  uint64_t voteFor = pVoteFor->valueint;
+
+  printf("read json: currentTerm:%lu, voteFor:%lu \n", currentTerm, voteFor);
+}
+
 int32_t currentTerm(SyncTerm *pCurrentTerm) { return 0; }
 
 int32_t persistCurrentTerm(SyncTerm currentTerm) { return 0; }
diff --git a/source/libs/sync/test/syncTest.cpp b/source/libs/sync/test/syncTest.cpp
index 955beea693..b5c24f896f 100644
--- a/source/libs/sync/test/syncTest.cpp
+++ b/source/libs/sync/test/syncTest.cpp
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include "syncIO.h"
 #include "syncInt.h"
+#include "syncRaftStore.h"
 
 void *pingFunc(void *param) {
   SSyncIO *io = (SSyncIO *)param;
@@ -13,6 +14,10 @@ void *pingFunc(void *param) {
 }
 
 int main() {
+
+  testJson();
+  testJson2();
+
   tsAsyncLog = 0;
   taosInitLog((char *)"syncTest.log", 100000, 10);