diff --git a/source/libs/sync/inc/syncMessage.h b/source/libs/sync/inc/syncMessage.h
index 3f19593e506a7057fc5121022d7688310e0d3edb..2876577410e977f90895d964b1f8e416d2efee26 100644
--- a/source/libs/sync/inc/syncMessage.h
+++ b/source/libs/sync/inc/syncMessage.h
@@ -47,6 +47,12 @@ cJSON* syncRpcMsg2Json(SRpcMsg* pRpcMsg);
 cJSON* syncRpcUnknownMsg2Json();
 char*  syncRpcMsg2Str(SRpcMsg* pRpcMsg);
 
+// for debug ----------------------
+void syncRpcMsgPrint(SRpcMsg* pMsg);
+void syncRpcMsgPrint2(char* s, SRpcMsg* pMsg);
+void syncRpcMsgLog(SRpcMsg* pMsg);
+void syncRpcMsgLog2(char* s, SRpcMsg* pMsg);
+
 // ---------------------------------------------
 typedef enum ESyncTimeoutType {
   SYNC_TIMEOUT_PING = 100,
diff --git a/source/libs/sync/src/syncMessage.c b/source/libs/sync/src/syncMessage.c
index 477ba1929e46a78b1876ca3f5be080bc7fb22204..5a55bbc11f855b6040cc6a7364338a08ffa8796c 100644
--- a/source/libs/sync/src/syncMessage.c
+++ b/source/libs/sync/src/syncMessage.c
@@ -23,39 +23,47 @@ cJSON* syncRpcMsg2Json(SRpcMsg* pRpcMsg) {
 
   // in compiler optimization, switch case = if else constants
   if (pRpcMsg->msgType == SYNC_TIMEOUT) {
-    SyncTimeout* pSyncMsg = (SyncTimeout*)pRpcMsg->pCont;
+    SyncTimeout* pSyncMsg = syncTimeoutDeserialize2(pRpcMsg->pCont, pRpcMsg->contLen);
     pRoot = syncTimeout2Json(pSyncMsg);
+    syncTimeoutDestroy(pSyncMsg);
 
   } else if (pRpcMsg->msgType == SYNC_PING) {
-    SyncPing* pSyncMsg = (SyncPing*)pRpcMsg->pCont;
+    SyncPing* pSyncMsg = syncPingDeserialize2(pRpcMsg->pCont, pRpcMsg->contLen);
     pRoot = syncPing2Json(pSyncMsg);
+    syncPingDestroy(pSyncMsg);
 
   } else if (pRpcMsg->msgType == SYNC_PING_REPLY) {
-    SyncPingReply* pSyncMsg = (SyncPingReply*)pRpcMsg->pCont;
+    SyncPingReply* pSyncMsg = syncPingReplyDeserialize2(pRpcMsg->pCont, pRpcMsg->contLen);
     pRoot = syncPingReply2Json(pSyncMsg);
+    syncPingReplyDestroy(pSyncMsg);
 
   } else if (pRpcMsg->msgType == SYNC_CLIENT_REQUEST) {
-    SyncClientRequest* pSyncMsg = (SyncClientRequest*)pRpcMsg->pCont;
+    SyncClientRequest* pSyncMsg = syncClientRequestDeserialize2(pRpcMsg->pCont, pRpcMsg->contLen);
     pRoot = syncClientRequest2Json(pSyncMsg);
+    syncClientRequestDestroy(pSyncMsg);
 
   } else if (pRpcMsg->msgType == SYNC_CLIENT_REQUEST_REPLY) {
     pRoot = syncRpcUnknownMsg2Json();
 
   } else if (pRpcMsg->msgType == SYNC_REQUEST_VOTE) {
-    SyncRequestVote* pSyncMsg = (SyncRequestVote*)pRpcMsg->pCont;
+    SyncRequestVote* pSyncMsg = syncRequestVoteDeserialize2(pRpcMsg->pCont, pRpcMsg->contLen);
     pRoot = syncRequestVote2Json(pSyncMsg);
+    syncRequestVoteDestroy(pSyncMsg);
 
   } else if (pRpcMsg->msgType == SYNC_REQUEST_VOTE_REPLY) {
-    SyncRequestVoteReply* pSyncMsg = (SyncRequestVoteReply*)pRpcMsg->pCont;
+    SyncRequestVoteReply* pSyncMsg = syncRequestVoteReplyDeserialize2(pRpcMsg->pCont, pRpcMsg->contLen);
     pRoot = syncRequestVoteReply2Json(pSyncMsg);
+    syncRequestVoteReplyDestroy(pSyncMsg);
 
   } else if (pRpcMsg->msgType == SYNC_APPEND_ENTRIES) {
-    SyncAppendEntries* pSyncMsg = (SyncAppendEntries*)pRpcMsg->pCont;
+    SyncAppendEntries* pSyncMsg = syncAppendEntriesDeserialize2(pRpcMsg->pCont, pRpcMsg->contLen);
     pRoot = syncAppendEntries2Json(pSyncMsg);
+    syncAppendEntriesDestroy(pSyncMsg);
 
   } else if (pRpcMsg->msgType == SYNC_APPEND_ENTRIES_REPLY) {
-    SyncAppendEntriesReply* pSyncMsg = (SyncAppendEntriesReply*)pRpcMsg->pCont;
+    SyncAppendEntriesReply* pSyncMsg = syncAppendEntriesReplyDeserialize2(pRpcMsg->pCont, pRpcMsg->contLen);
     pRoot = syncAppendEntriesReply2Json(pSyncMsg);
+    syncAppendEntriesReplyDestroy(pSyncMsg);
 
   } else {
     pRoot = syncRpcUnknownMsg2Json();
@@ -72,7 +80,7 @@ cJSON* syncRpcUnknownMsg2Json() {
   cJSON_AddStringToObject(pRoot, "data", "known message");
 
   cJSON* pJson = cJSON_CreateObject();
-  cJSON_AddItemToObject(pJson, "SyncPing", pRoot);
+  cJSON_AddItemToObject(pJson, "SyncUnknown", pRoot);
   return pJson;
 }
 
@@ -83,6 +91,33 @@ char* syncRpcMsg2Str(SRpcMsg* pRpcMsg) {
   return serialized;
 }
 
+// for debug ----------------------
+void syncRpcMsgPrint(SRpcMsg* pMsg) {
+  char* serialized = syncRpcMsg2Str(pMsg);
+  printf("syncRpcMsgPrint | len:%lu | %s \n", strlen(serialized), serialized);
+  fflush(NULL);
+  free(serialized);
+}
+
+void syncRpcMsgPrint2(char* s, SRpcMsg* pMsg) {
+  char* serialized = syncRpcMsg2Str(pMsg);
+  printf("syncRpcMsgPrint2 | len:%lu | %s | %s \n", strlen(serialized), s, serialized);
+  fflush(NULL);
+  free(serialized);
+}
+
+void syncRpcMsgLog(SRpcMsg* pMsg) {
+  char* serialized = syncRpcMsg2Str(pMsg);
+  sTrace("syncRpcMsgLog | len:%lu | %s", strlen(serialized), serialized);
+  free(serialized);
+}
+
+void syncRpcMsgLog2(char* s, SRpcMsg* pMsg) {
+  char* serialized = syncRpcMsg2Str(pMsg);
+  sTrace("syncRpcMsgLog2 | len:%lu | %s | %s", strlen(serialized), s, serialized);
+  free(serialized);
+}
+
 // ---- message process SyncTimeout----
 SyncTimeout* syncTimeoutBuild() {
   uint32_t     bytes = sizeof(SyncTimeout);
diff --git a/source/libs/sync/test/CMakeLists.txt b/source/libs/sync/test/CMakeLists.txt
index 3a87d3f2e2280af25cff7770ba1b7c46ffa56c24..6648ae35807d06db50770d14fadc9fe1a106d611 100644
--- a/source/libs/sync/test/CMakeLists.txt
+++ b/source/libs/sync/test/CMakeLists.txt
@@ -25,6 +25,7 @@ add_executable(syncClientRequestTest "")
 add_executable(syncTimeoutTest "")
 add_executable(syncPingTest "")
 add_executable(syncPingReplyTest "")
+add_executable(syncRpcMsgTest "")
 
 
 target_sources(syncTest
@@ -135,6 +136,10 @@ target_sources(syncPingReplyTest
     PRIVATE
     "syncPingReplyTest.cpp"
 )
+target_sources(syncRpcMsgTest
+    PRIVATE
+    "syncRpcMsgTest.cpp"
+)
 
 
 target_include_directories(syncTest
@@ -272,6 +277,11 @@ target_include_directories(syncPingReplyTest
     "${CMAKE_SOURCE_DIR}/include/libs/sync"
     "${CMAKE_CURRENT_SOURCE_DIR}/../inc"
 )
+target_include_directories(syncRpcMsgTest
+    PUBLIC
+    "${CMAKE_SOURCE_DIR}/include/libs/sync"
+    "${CMAKE_CURRENT_SOURCE_DIR}/../inc"
+)
 
 
 target_link_libraries(syncTest
@@ -382,6 +392,10 @@ target_link_libraries(syncPingReplyTest
     sync
     gtest_main
 )
+target_link_libraries(syncRpcMsgTest
+    sync
+    gtest_main
+)
 
 
 enable_testing()
diff --git a/source/libs/sync/test/syncAppendEntriesReplyTest.cpp b/source/libs/sync/test/syncAppendEntriesReplyTest.cpp
index c883ab941acaa518d31c05a146226d180a76d261..362da67c66869a85a06b6d34398ffd5f30d0f165 100644
--- a/source/libs/sync/test/syncAppendEntriesReplyTest.cpp
+++ b/source/libs/sync/test/syncAppendEntriesReplyTest.cpp
@@ -22,6 +22,7 @@ SyncAppendEntriesReply *createMsg() {
   pMsg->destId.vgId = 100;
   pMsg->success = true;
   pMsg->matchIndex = 77;
+  return pMsg;
 }
 
 void test1() {
diff --git a/source/libs/sync/test/syncPingReplyTest.cpp b/source/libs/sync/test/syncPingReplyTest.cpp
index 27f88b698cbf573595c7dc133e3b5c8e4a96dbb5..8e1448e7818c8d41c6b880208c2f4fe78ecb4035 100644
--- a/source/libs/sync/test/syncPingReplyTest.cpp
+++ b/source/libs/sync/test/syncPingReplyTest.cpp
@@ -32,8 +32,8 @@ void test1() {
 
 void test2() {
   SyncPingReply *pMsg = createMsg();
-  uint32_t     len = pMsg->bytes;
-  char *       serialized = (char *)malloc(len);
+  uint32_t       len = pMsg->bytes;
+  char *         serialized = (char *)malloc(len);
   syncPingReplySerialize(pMsg, serialized, len);
   SyncPingReply *pMsg2 = syncPingReplyBuild(pMsg->dataLen);
   syncPingReplyDeserialize(serialized, len, pMsg2);
@@ -46,8 +46,8 @@ void test2() {
 
 void test3() {
   SyncPingReply *pMsg = createMsg();
-  uint32_t     len;
-  char *       serialized = syncPingReplySerialize2(pMsg, &len);
+  uint32_t       len;
+  char *         serialized = syncPingReplySerialize2(pMsg, &len);
   SyncPingReply *pMsg2 = syncPingReplyDeserialize2(serialized, len);
   syncPingReplyPrint2((char *)"test3: syncPingReplySerialize3 -> syncPingReplyDeserialize2 ", pMsg2);
 
@@ -58,7 +58,7 @@ void test3() {
 
 void test4() {
   SyncPingReply *pMsg = createMsg();
-  SRpcMsg      rpcMsg;
+  SRpcMsg        rpcMsg;
   syncPingReply2RpcMsg(pMsg, &rpcMsg);
   SyncPingReply *pMsg2 = (SyncPingReply *)malloc(rpcMsg.contLen);
   syncPingReplyFromRpcMsg(&rpcMsg, pMsg2);
@@ -70,7 +70,7 @@ void test4() {
 
 void test5() {
   SyncPingReply *pMsg = createMsg();
-  SRpcMsg      rpcMsg;
+  SRpcMsg        rpcMsg;
   syncPingReply2RpcMsg(pMsg, &rpcMsg);
   SyncPingReply *pMsg2 = syncPingReplyFromRpcMsg2(&rpcMsg);
   syncPingReplyPrint2((char *)"test5: syncPingReply2RpcMsg -> syncPingReplyFromRpcMsg2 ", pMsg2);
diff --git a/source/libs/sync/test/syncPingTest.cpp b/source/libs/sync/test/syncPingTest.cpp
index 8776d2de5219cd96e559c70b149f3e61ae41b6d1..83394b0e77404b32ef665643fc85cdf6f8a602b6 100644
--- a/source/libs/sync/test/syncPingTest.cpp
+++ b/source/libs/sync/test/syncPingTest.cpp
@@ -32,8 +32,8 @@ void test1() {
 
 void test2() {
   SyncPing *pMsg = createMsg();
-  uint32_t     len = pMsg->bytes;
-  char *       serialized = (char *)malloc(len);
+  uint32_t  len = pMsg->bytes;
+  char *    serialized = (char *)malloc(len);
   syncPingSerialize(pMsg, serialized, len);
   SyncPing *pMsg2 = syncPingBuild(pMsg->dataLen);
   syncPingDeserialize(serialized, len, pMsg2);
@@ -46,8 +46,8 @@ void test2() {
 
 void test3() {
   SyncPing *pMsg = createMsg();
-  uint32_t     len;
-  char *       serialized = syncPingSerialize2(pMsg, &len);
+  uint32_t  len;
+  char *    serialized = syncPingSerialize2(pMsg, &len);
   SyncPing *pMsg2 = syncPingDeserialize2(serialized, len);
   syncPingPrint2((char *)"test3: syncPingSerialize3 -> syncPingDeserialize2 ", pMsg2);
 
@@ -58,7 +58,7 @@ void test3() {
 
 void test4() {
   SyncPing *pMsg = createMsg();
-  SRpcMsg      rpcMsg;
+  SRpcMsg   rpcMsg;
   syncPing2RpcMsg(pMsg, &rpcMsg);
   SyncPing *pMsg2 = (SyncPing *)malloc(rpcMsg.contLen);
   syncPingFromRpcMsg(&rpcMsg, pMsg2);
@@ -70,7 +70,7 @@ void test4() {
 
 void test5() {
   SyncPing *pMsg = createMsg();
-  SRpcMsg      rpcMsg;
+  SRpcMsg   rpcMsg;
   syncPing2RpcMsg(pMsg, &rpcMsg);
   SyncPing *pMsg2 = syncPingFromRpcMsg2(&rpcMsg);
   syncPingPrint2((char *)"test5: syncPing2RpcMsg -> syncPingFromRpcMsg2 ", pMsg2);
diff --git a/source/libs/sync/test/syncRequestVoteReplyTest.cpp b/source/libs/sync/test/syncRequestVoteReplyTest.cpp
index 52f54cbaaff901d92047c5da77c60469534c9c86..2bce3e4cd6b00e077e6e5abc54f54a94b357995e 100644
--- a/source/libs/sync/test/syncRequestVoteReplyTest.cpp
+++ b/source/libs/sync/test/syncRequestVoteReplyTest.cpp
@@ -22,6 +22,7 @@ SyncRequestVoteReply *createMsg() {
   pMsg->destId.vgId = 100;
   pMsg->term = 77;
   pMsg->voteGranted = true;
+  return pMsg;
 }
 
 void test1() {
diff --git a/source/libs/sync/test/syncRequestVoteTest.cpp b/source/libs/sync/test/syncRequestVoteTest.cpp
index e46eb87fe9bc465829146ddaef6eeb91a57c8ce4..7f75ee937b17fc1b36370ef40559c6197a53e77b 100644
--- a/source/libs/sync/test/syncRequestVoteTest.cpp
+++ b/source/libs/sync/test/syncRequestVoteTest.cpp
@@ -23,6 +23,7 @@ SyncRequestVote *createMsg() {
   pMsg->currentTerm = 11;
   pMsg->lastLogIndex = 22;
   pMsg->lastLogTerm = 33;
+  return pMsg;
 }
 
 void test1() {
diff --git a/source/libs/sync/test/syncRpcMsgTest.cpp b/source/libs/sync/test/syncRpcMsgTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..0331a29f226f379fe96b31f51a085986b5716414
--- /dev/null
+++ b/source/libs/sync/test/syncRpcMsgTest.cpp
@@ -0,0 +1,181 @@
+#include <gtest/gtest.h>
+#include <stdio.h>
+#include "syncIO.h"
+#include "syncInt.h"
+#include "syncMessage.h"
+#include "syncUtil.h"
+
+void logTest() {
+  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");
+}
+
+int          gg = 0;
+SyncTimeout *createSyncTimeout() {
+  SyncTimeout *pMsg = syncTimeoutBuild2(SYNC_TIMEOUT_PING, 999, 333, &gg);
+  return pMsg;
+}
+
+SyncPing *createSyncPing() {
+  SRaftId srcId, destId;
+  srcId.addr = syncUtilAddr2U64("127.0.0.1", 1234);
+  srcId.vgId = 100;
+  destId.addr = syncUtilAddr2U64("127.0.0.1", 5678);
+  destId.vgId = 100;
+  SyncPing *pMsg = syncPingBuild3(&srcId, &destId);
+  return pMsg;
+}
+
+SyncPingReply *createSyncPingReply() {
+  SRaftId srcId, destId;
+  srcId.addr = syncUtilAddr2U64("127.0.0.1", 1234);
+  srcId.vgId = 100;
+  destId.addr = syncUtilAddr2U64("127.0.0.1", 5678);
+  destId.vgId = 100;
+  SyncPingReply *pMsg = syncPingReplyBuild3(&srcId, &destId);
+  return pMsg;
+}
+
+SyncClientRequest *createSyncClientRequest() {
+  SRpcMsg rpcMsg;
+  memset(&rpcMsg, 0, sizeof(rpcMsg));
+  rpcMsg.msgType = 12345;
+  rpcMsg.contLen = 20;
+  rpcMsg.pCont = rpcMallocCont(rpcMsg.contLen);
+  strcpy((char *)rpcMsg.pCont, "hello rpc");
+  SyncClientRequest *pMsg = syncClientRequestBuild2(&rpcMsg, 123, true);
+  return pMsg;
+}
+
+SyncRequestVote *createSyncRequestVote() {
+  SyncRequestVote *pMsg = syncRequestVoteBuild();
+  pMsg->srcId.addr = syncUtilAddr2U64("127.0.0.1", 1234);
+  pMsg->srcId.vgId = 100;
+  pMsg->destId.addr = syncUtilAddr2U64("127.0.0.1", 5678);
+  pMsg->destId.vgId = 100;
+  pMsg->currentTerm = 11;
+  pMsg->lastLogIndex = 22;
+  pMsg->lastLogTerm = 33;
+  return pMsg;
+}
+
+SyncRequestVoteReply *createSyncRequestVoteReply() {
+  SyncRequestVoteReply *pMsg = syncRequestVoteReplyBuild();
+  pMsg->srcId.addr = syncUtilAddr2U64("127.0.0.1", 1234);
+  pMsg->srcId.vgId = 100;
+  pMsg->destId.addr = syncUtilAddr2U64("127.0.0.1", 5678);
+  pMsg->destId.vgId = 100;
+  pMsg->term = 77;
+  pMsg->voteGranted = true;
+  return pMsg;
+}
+
+SyncAppendEntries *createSyncAppendEntries() {
+  SyncAppendEntries *pMsg = syncAppendEntriesBuild(20);
+  pMsg->srcId.addr = syncUtilAddr2U64("127.0.0.1", 1234);
+  pMsg->srcId.vgId = 100;
+  pMsg->destId.addr = syncUtilAddr2U64("127.0.0.1", 5678);
+  pMsg->destId.vgId = 100;
+  pMsg->prevLogIndex = 11;
+  pMsg->prevLogTerm = 22;
+  pMsg->commitIndex = 33;
+  strcpy(pMsg->data, "hello world");
+  return pMsg;
+}
+
+SyncAppendEntriesReply *createSyncAppendEntriesReply() {
+  SyncAppendEntriesReply *pMsg = syncAppendEntriesReplyBuild();
+  pMsg->srcId.addr = syncUtilAddr2U64("127.0.0.1", 1234);
+  pMsg->srcId.vgId = 100;
+  pMsg->destId.addr = syncUtilAddr2U64("127.0.0.1", 5678);
+  pMsg->destId.vgId = 100;
+  pMsg->success = true;
+  pMsg->matchIndex = 77;
+  return pMsg;
+}
+
+void test1() {
+  SyncTimeout *pMsg = createSyncTimeout();
+  SRpcMsg          rpcMsg;
+  syncTimeout2RpcMsg(pMsg, &rpcMsg);
+  syncRpcMsgPrint2((char *)"test1", &rpcMsg);
+  syncTimeoutDestroy(pMsg);
+}
+
+void test2() {
+  SyncPing *pMsg = createSyncPing();
+  SRpcMsg          rpcMsg;
+  syncPing2RpcMsg(pMsg, &rpcMsg);
+  syncRpcMsgPrint2((char *)"test2", &rpcMsg);
+  syncPingDestroy(pMsg);
+}
+
+void test3() {
+  SyncPingReply *pMsg = createSyncPingReply();
+  SRpcMsg          rpcMsg;
+  syncPingReply2RpcMsg(pMsg, &rpcMsg);
+  syncRpcMsgPrint2((char *)"test3", &rpcMsg);
+  syncPingReplyDestroy(pMsg);
+}
+
+void test4() {
+  SyncRequestVote *pMsg = createSyncRequestVote();
+  SRpcMsg          rpcMsg;
+  syncRequestVote2RpcMsg(pMsg, &rpcMsg);
+  syncRpcMsgPrint2((char *)"test4", &rpcMsg);
+  syncRequestVoteDestroy(pMsg);
+}
+
+void test5() {
+  SyncRequestVoteReply *pMsg = createSyncRequestVoteReply();
+  SRpcMsg          rpcMsg;
+  syncRequestVoteReply2RpcMsg(pMsg, &rpcMsg);
+  syncRpcMsgPrint2((char *)"test5", &rpcMsg);
+  syncRequestVoteReplyDestroy(pMsg);
+}
+
+void test6() {
+  SyncAppendEntries *pMsg = createSyncAppendEntries();
+  SRpcMsg          rpcMsg;
+  syncAppendEntries2RpcMsg(pMsg, &rpcMsg);
+  syncRpcMsgPrint2((char *)"test6", &rpcMsg);
+  syncAppendEntriesDestroy(pMsg);
+}
+
+void test7() {
+  SyncAppendEntriesReply *pMsg = createSyncAppendEntriesReply();
+  SRpcMsg          rpcMsg;
+  syncAppendEntriesReply2RpcMsg(pMsg, &rpcMsg);
+  syncRpcMsgPrint2((char *)"test7", &rpcMsg);
+  syncAppendEntriesReplyDestroy(pMsg);
+}
+
+void test8() {
+  SyncClientRequest *pMsg = createSyncClientRequest();
+  SRpcMsg          rpcMsg;
+  syncClientRequest2RpcMsg(pMsg, &rpcMsg);
+  syncRpcMsgPrint2((char *)"test8", &rpcMsg);
+  syncClientRequestDestroy(pMsg);
+}
+
+int main() {
+  // taosInitLog((char *)"syncTest.log", 100000, 10);
+  tsAsyncLog = 0;
+  sDebugFlag = 143 + 64;
+  logTest();
+
+  test1();
+  test2();
+  test3();
+  test4();
+  test5();
+  test6();
+  test7();
+  test8();
+
+  return 0;
+}