diff --git a/source/libs/sync/inc/syncEnv.h b/source/libs/sync/inc/syncEnv.h
index cf4e3309f1..628e8874b4 100644
--- a/source/libs/sync/inc/syncEnv.h
+++ b/source/libs/sync/inc/syncEnv.h
@@ -30,8 +30,6 @@ extern "C" {
 #define ELECT_TIMER_MS_RANGE (ELECT_TIMER_MS_MAX - ELECT_TIMER_MS_MIN)
 #define HEARTBEAT_TIMER_MS   1000
 
-#define EMPTY_RAFT_ID ((SRaftId){.addr = 0, .vgId = 0})
-
 typedef struct SSyncEnv {
   uint8_t isStart;
 
diff --git a/source/libs/sync/inc/syncRaftLog.h b/source/libs/sync/inc/syncRaftLog.h
index 17ea36c640..de8bd81b30 100644
--- a/source/libs/sync/inc/syncRaftLog.h
+++ b/source/libs/sync/inc/syncRaftLog.h
@@ -38,7 +38,6 @@ SSyncLogStore* logStoreCreate(SSyncNode* pSyncNode);
 void           logStoreDestory(SSyncLogStore* pLogStore);
 
 SyncIndex logStoreFirstIndex(SSyncLogStore* pLogStore);
-
 SyncIndex logStoreWalCommitVer(SSyncLogStore* pLogStore);
 
 SyncIndex raftLogWriteIndex(struct SSyncLogStore* pLogStore);
diff --git a/source/libs/sync/inc/syncRaftStore.h b/source/libs/sync/inc/syncRaftStore.h
index 077e6a7658..bb6405f6b2 100644
--- a/source/libs/sync/inc/syncRaftStore.h
+++ b/source/libs/sync/inc/syncRaftStore.h
@@ -25,6 +25,8 @@ extern "C" {
 #define RAFT_STORE_BLOCK_SIZE 512
 #define RAFT_STORE_PATH_LEN   (TSDB_FILENAME_LEN * 2)
 
+#define EMPTY_RAFT_ID ((SRaftId){.addr = 0, .vgId = 0})
+
 typedef struct SRaftStore {
   SyncTerm  currentTerm;
   SRaftId   voteFor;
@@ -38,20 +40,11 @@ int32_t     raftStorePersist(SRaftStore *pRaftStore);
 int32_t     raftStoreSerialize(SRaftStore *pRaftStore, char *buf, size_t len);
 int32_t     raftStoreDeserialize(SRaftStore *pRaftStore, char *buf, size_t len);
 
-bool    raftStoreHasVoted(SRaftStore *pRaftStore);
-void    raftStoreVote(SRaftStore *pRaftStore, SRaftId *pRaftId);
-void    raftStoreClearVote(SRaftStore *pRaftStore);
-void    raftStoreNextTerm(SRaftStore *pRaftStore);
-void    raftStoreSetTerm(SRaftStore *pRaftStore, SyncTerm term);
-int32_t raftStoreFromJson(SRaftStore *pRaftStore, cJSON *pJson);
-cJSON  *raftStore2Json(SRaftStore *pRaftStore);
-char   *raftStore2Str(SRaftStore *pRaftStore);
-
-// for debug -------------------
-void raftStorePrint(SRaftStore *pObj);
-void raftStorePrint2(char *s, SRaftStore *pObj);
-void raftStoreLog(SRaftStore *pObj);
-void raftStoreLog2(char *s, SRaftStore *pObj);
+bool raftStoreHasVoted(SRaftStore *pRaftStore);
+void raftStoreVote(SRaftStore *pRaftStore, SRaftId *pRaftId);
+void raftStoreClearVote(SRaftStore *pRaftStore);
+void raftStoreNextTerm(SRaftStore *pRaftStore);
+void raftStoreSetTerm(SRaftStore *pRaftStore, SyncTerm term);
 
 #ifdef __cplusplus
 }
diff --git a/source/libs/sync/src/syncRaftLog.c b/source/libs/sync/src/syncRaftLog.c
index d4a1d35c74..2cdb18a109 100644
--- a/source/libs/sync/src/syncRaftLog.c
+++ b/source/libs/sync/src/syncRaftLog.c
@@ -13,33 +13,33 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define _DEFAULT_SOURCE
 #include "syncRaftLog.h"
 #include "syncRaftCfg.h"
 #include "syncRaftStore.h"
 
-//-------------------------------
 // log[m .. n]
 
 // public function
 static int32_t   raftLogRestoreFromSnapshot(struct SSyncLogStore* pLogStore, SyncIndex snapshotIndex);
-
 static int32_t   raftLogAppendEntry(struct SSyncLogStore* pLogStore, SSyncRaftEntry* pEntry);
 static int32_t   raftLogTruncate(struct SSyncLogStore* pLogStore, SyncIndex fromIndex);
 static bool      raftLogExist(struct SSyncLogStore* pLogStore, SyncIndex index);
 static int32_t   raftLogUpdateCommitIndex(SSyncLogStore* pLogStore, SyncIndex index);
 static SyncIndex raftlogCommitIndex(SSyncLogStore* pLogStore);
+static int32_t   raftLogGetLastEntry(SSyncLogStore* pLogStore, SSyncRaftEntry** ppLastEntry);
 
-static int32_t raftLogGetLastEntry(SSyncLogStore* pLogStore, SSyncRaftEntry** ppLastEntry);
-
-//-------------------------------
 SSyncLogStore* logStoreCreate(SSyncNode* pSyncNode) {
-  SSyncLogStore* pLogStore = taosMemoryMalloc(sizeof(SSyncLogStore));
-  ASSERT(pLogStore != NULL);
+  SSyncLogStore* pLogStore = taosMemoryCalloc(1, sizeof(SSyncLogStore));
+  if (pLogStore == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return NULL;
+  }
 
   pLogStore->pCache = taosLRUCacheInit(10 * 1024 * 1024, 1, .5);
   if (pLogStore->pCache == NULL) {
-    terrno = TSDB_CODE_WAL_OUT_OF_MEMORY;
     taosMemoryFree(pLogStore);
+    terrno = TSDB_CODE_WAL_OUT_OF_MEMORY;
     return NULL;
   }
 
@@ -96,7 +96,6 @@ void logStoreDestory(SSyncLogStore* pLogStore) {
   }
 }
 
-//-------------------------------
 // log[m .. n]
 static int32_t raftLogRestoreFromSnapshot(struct SSyncLogStore* pLogStore, SyncIndex snapshotIndex) {
   ASSERT(snapshotIndex >= 0);
diff --git a/source/libs/sync/src/syncRaftStore.c b/source/libs/sync/src/syncRaftStore.c
index 1c96e70858..e328ed3d31 100644
--- a/source/libs/sync/src/syncRaftStore.c
+++ b/source/libs/sync/src/syncRaftStore.c
@@ -15,8 +15,6 @@
 
 #define _DEFAULT_SOURCE
 #include "syncRaftStore.h"
-#include "cJSON.h"
-#include "syncEnv.h"
 #include "syncUtil.h"
 
 // private function
@@ -27,22 +25,19 @@ static bool    raftStoreFileExist(char *path);
 SRaftStore *raftStoreOpen(const char *path) {
   int32_t ret;
 
-  SRaftStore *pRaftStore = taosMemoryMalloc(sizeof(SRaftStore));
+  SRaftStore *pRaftStore = taosMemoryCalloc(1, sizeof(SRaftStore));
   if (pRaftStore == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     return NULL;
   }
-  memset(pRaftStore, 0, sizeof(*pRaftStore));
+
   snprintf(pRaftStore->path, sizeof(pRaftStore->path), "%s", path);
-
-  char storeBuf[RAFT_STORE_BLOCK_SIZE] = {0};
-  memset(storeBuf, 0, sizeof(storeBuf));
-
   if (!raftStoreFileExist(pRaftStore->path)) {
     ret = raftStoreInit(pRaftStore);
     ASSERT(ret == 0);
   }
 
+  char storeBuf[RAFT_STORE_BLOCK_SIZE] = {0};
   pRaftStore->pFile = taosOpenFile(path, TD_FILE_READ | TD_FILE_WRITE);
   ASSERT(pRaftStore->pFile != NULL);
 
@@ -73,9 +68,7 @@ static int32_t raftStoreInit(SRaftStore *pRaftStore) {
 }
 
 int32_t raftStoreClose(SRaftStore *pRaftStore) {
-  if (pRaftStore == NULL) {
-    return 0;
-  }
+  if (pRaftStore == NULL) return 0;
 
   taosCloseFile(&pRaftStore->pFile);
   taosMemoryFree(pRaftStore);
@@ -183,69 +176,3 @@ void raftStoreSetTerm(SRaftStore *pRaftStore, SyncTerm term) {
   pRaftStore->currentTerm = term;
   raftStorePersist(pRaftStore);
 }
-
-int32_t raftStoreFromJson(SRaftStore *pRaftStore, cJSON *pJson) { return 0; }
-
-cJSON *raftStore2Json(SRaftStore *pRaftStore) {
-  char   u64buf[128] = {0};
-  cJSON *pRoot = cJSON_CreateObject();
-
-  if (pRaftStore != NULL) {
-    snprintf(u64buf, sizeof(u64buf), "%" PRIu64 "", pRaftStore->currentTerm);
-    cJSON_AddStringToObject(pRoot, "currentTerm", u64buf);
-
-    cJSON *pVoteFor = cJSON_CreateObject();
-    snprintf(u64buf, sizeof(u64buf), "%" PRIu64 "", pRaftStore->voteFor.addr);
-    cJSON_AddStringToObject(pVoteFor, "addr", u64buf);
-    {
-      uint64_t u64 = pRaftStore->voteFor.addr;
-      char     host[128] = {0};
-      uint16_t port;
-      syncUtilU642Addr(u64, host, sizeof(host), &port);
-      cJSON_AddStringToObject(pVoteFor, "addr_host", host);
-      cJSON_AddNumberToObject(pVoteFor, "addr_port", port);
-    }
-    cJSON_AddNumberToObject(pVoteFor, "vgId", pRaftStore->voteFor.vgId);
-    cJSON_AddItemToObject(pRoot, "voteFor", pVoteFor);
-
-    int hasVoted = raftStoreHasVoted(pRaftStore);
-    cJSON_AddNumberToObject(pRoot, "hasVoted", hasVoted);
-  }
-
-  cJSON *pJson = cJSON_CreateObject();
-  cJSON_AddItemToObject(pJson, "SRaftStore", pRoot);
-  return pJson;
-}
-
-char *raftStore2Str(SRaftStore *pRaftStore) {
-  cJSON *pJson = raftStore2Json(pRaftStore);
-  char  *serialized = cJSON_Print(pJson);
-  cJSON_Delete(pJson);
-  return serialized;
-}
-
-// for debug -------------------
-void raftStorePrint(SRaftStore *pObj) {
-  char *serialized = raftStore2Str(pObj);
-  printf("raftStorePrint | len:%d | %s \n", (int32_t)strlen(serialized), serialized);
-  fflush(NULL);
-  taosMemoryFree(serialized);
-}
-
-void raftStorePrint2(char *s, SRaftStore *pObj) {
-  char *serialized = raftStore2Str(pObj);
-  printf("raftStorePrint2 | len:%d | %s | %s \n", (int32_t)strlen(serialized), s, serialized);
-  fflush(NULL);
-  taosMemoryFree(serialized);
-}
-void raftStoreLog(SRaftStore *pObj) {
-  char *serialized = raftStore2Str(pObj);
-  sTrace("raftStoreLog | len:%d | %s", (int32_t)strlen(serialized), serialized);
-  taosMemoryFree(serialized);
-}
-
-void raftStoreLog2(char *s, SRaftStore *pObj) {
-  char *serialized = raftStore2Str(pObj);
-  sTrace("raftStoreLog2 | len:%d | %s | %s", (int32_t)strlen(serialized), s, serialized);
-  taosMemoryFree(serialized);
-}
diff --git a/source/libs/sync/test/sync_test_lib/inc/syncTest.h b/source/libs/sync/test/sync_test_lib/inc/syncTest.h
index a1881bf1b3..34ce8c3175 100644
--- a/source/libs/sync/test/sync_test_lib/inc/syncTest.h
+++ b/source/libs/sync/test/sync_test_lib/inc/syncTest.h
@@ -63,6 +63,14 @@ void   raftEntryCachePrint2(char* s, SRaftEntryCache* pObj);
 void   raftEntryCacheLog(SRaftEntryCache* pObj);
 void   raftEntryCacheLog2(char* s, SRaftEntryCache* pObj);
 
+int32_t raftStoreFromJson(SRaftStore* pRaftStore, cJSON* pJson);
+cJSON*  raftStore2Json(SRaftStore* pRaftStore);
+char*   raftStore2Str(SRaftStore* pRaftStore);
+void    raftStorePrint(SRaftStore* pObj);
+void    raftStorePrint2(char* s, SRaftStore* pObj);
+void    raftStoreLog(SRaftStore* pObj);
+void    raftStoreLog2(char* s, SRaftStore* pObj);
+
 cJSON* syncAppendEntriesBatch2Json(const SyncAppendEntriesBatch* pMsg);
 char*  syncAppendEntriesBatch2Str(const SyncAppendEntriesBatch* pMsg);
 void   syncAppendEntriesBatchPrint(const SyncAppendEntriesBatch* pMsg);
@@ -99,6 +107,8 @@ char*  snapshotSender2Str(SSyncSnapshotSender* pSender);
 cJSON* snapshotReceiver2Json(SSyncSnapshotReceiver* pReceiver);
 char*  snapshotReceiver2Str(SSyncSnapshotReceiver* pReceiver);
 
+
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/libs/sync/test/sync_test_lib/src/syncRaftStoreDebug.c b/source/libs/sync/test/sync_test_lib/src/syncRaftStoreDebug.c
new file mode 100644
index 0000000000..0c4dd95e48
--- /dev/null
+++ b/source/libs/sync/test/sync_test_lib/src/syncRaftStoreDebug.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define _DEFAULT_SOURCE
+#include "syncTest.h"
+#include "cJSON.h"
+
+int32_t raftStoreFromJson(SRaftStore *pRaftStore, cJSON *pJson) { return 0; }
+
+cJSON *raftStore2Json(SRaftStore *pRaftStore) {
+  char   u64buf[128] = {0};
+  cJSON *pRoot = cJSON_CreateObject();
+
+  if (pRaftStore != NULL) {
+    snprintf(u64buf, sizeof(u64buf), "%" PRIu64 "", pRaftStore->currentTerm);
+    cJSON_AddStringToObject(pRoot, "currentTerm", u64buf);
+
+    cJSON *pVoteFor = cJSON_CreateObject();
+    snprintf(u64buf, sizeof(u64buf), "%" PRIu64 "", pRaftStore->voteFor.addr);
+    cJSON_AddStringToObject(pVoteFor, "addr", u64buf);
+    {
+      uint64_t u64 = pRaftStore->voteFor.addr;
+      char     host[128] = {0};
+      uint16_t port;
+      syncUtilU642Addr(u64, host, sizeof(host), &port);
+      cJSON_AddStringToObject(pVoteFor, "addr_host", host);
+      cJSON_AddNumberToObject(pVoteFor, "addr_port", port);
+    }
+    cJSON_AddNumberToObject(pVoteFor, "vgId", pRaftStore->voteFor.vgId);
+    cJSON_AddItemToObject(pRoot, "voteFor", pVoteFor);
+
+    int hasVoted = raftStoreHasVoted(pRaftStore);
+    cJSON_AddNumberToObject(pRoot, "hasVoted", hasVoted);
+  }
+
+  cJSON *pJson = cJSON_CreateObject();
+  cJSON_AddItemToObject(pJson, "SRaftStore", pRoot);
+  return pJson;
+}
+
+char *raftStore2Str(SRaftStore *pRaftStore) {
+  cJSON *pJson = raftStore2Json(pRaftStore);
+  char  *serialized = cJSON_Print(pJson);
+  cJSON_Delete(pJson);
+  return serialized;
+}
+
+// for debug -------------------
+void raftStorePrint(SRaftStore *pObj) {
+  char *serialized = raftStore2Str(pObj);
+  printf("raftStorePrint | len:%d | %s \n", (int32_t)strlen(serialized), serialized);
+  fflush(NULL);
+  taosMemoryFree(serialized);
+}
+
+void raftStorePrint2(char *s, SRaftStore *pObj) {
+  char *serialized = raftStore2Str(pObj);
+  printf("raftStorePrint2 | len:%d | %s | %s \n", (int32_t)strlen(serialized), s, serialized);
+  fflush(NULL);
+  taosMemoryFree(serialized);
+}
+void raftStoreLog(SRaftStore *pObj) {
+  char *serialized = raftStore2Str(pObj);
+  sTrace("raftStoreLog | len:%d | %s", (int32_t)strlen(serialized), serialized);
+  taosMemoryFree(serialized);
+}
+
+void raftStoreLog2(char *s, SRaftStore *pObj) {
+  char *serialized = raftStore2Str(pObj);
+  sTrace("raftStoreLog2 | len:%d | %s | %s", (int32_t)strlen(serialized), s, serialized);
+  taosMemoryFree(serialized);
+}
\ No newline at end of file