diff --git a/include/libs/sync/sync.h b/include/libs/sync/sync.h
index a0c07f0c09fde9236fd7d5cf65b2596727261414..2bf49fa006e4530088f411ff817e105010888aee 100644
--- a/include/libs/sync/sync.h
+++ b/include/libs/sync/sync.h
@@ -157,13 +157,13 @@ typedef struct SSyncLogStore {
   SyncIndex (*getCommitIndex)(struct SSyncLogStore* pLogStore);
 
   // refactor, log[0 .. n] ==> log[m .. n]
-  int32_t (*syncLogSetBeginIndex)(struct SSyncLogStore* pLogStore, SyncIndex beginIndex);
-  int32_t (*syncLogResetBeginIndex)(struct SSyncLogStore* pLogStore);
+  // int32_t (*syncLogSetBeginIndex)(struct SSyncLogStore* pLogStore, SyncIndex beginIndex);
+
   SyncIndex (*syncLogBeginIndex)(struct SSyncLogStore* pLogStore);
   SyncIndex (*syncLogEndIndex)(struct SSyncLogStore* pLogStore);
   bool (*syncLogIsEmpty)(struct SSyncLogStore* pLogStore);
   int32_t (*syncLogEntryCount)(struct SSyncLogStore* pLogStore);
-  // bool (*syncLogInRange)(struct SSyncLogStore* pLogStore, SyncIndex index);
+  int32_t (*syncLogRestoreFromSnapshot)(struct SSyncLogStore* pLogStore, SyncIndex index);
 
   SyncIndex (*syncLogWriteIndex)(struct SSyncLogStore* pLogStore);
   SyncIndex (*syncLogLastIndex)(struct SSyncLogStore* pLogStore);
diff --git a/source/libs/sync/inc/syncEnv.h b/source/libs/sync/inc/syncEnv.h
index 4f91990ccf29a93cdd7b9d4fd4f2e16bfc3df480..2e8e0e1227c81a0faf9c828eb8f403367495b408 100644
--- a/source/libs/sync/inc/syncEnv.h
+++ b/source/libs/sync/inc/syncEnv.h
@@ -28,13 +28,13 @@ extern "C" {
 #include "trpc.h"
 #include "ttimer.h"
 
-#define TIMER_MAX_MS 0x7FFFFFFF
-#define ENV_TICK_TIMER_MS 1000
-#define PING_TIMER_MS 1000
-#define ELECT_TIMER_MS_MIN 500
-#define ELECT_TIMER_MS_MAX (ELECT_TIMER_MS_MIN * 2)
+#define TIMER_MAX_MS         0x7FFFFFFF
+#define ENV_TICK_TIMER_MS    1000
+#define PING_TIMER_MS        1000
+#define ELECT_TIMER_MS_MIN   1300
+#define ELECT_TIMER_MS_MAX   (ELECT_TIMER_MS_MIN * 2)
 #define ELECT_TIMER_MS_RANGE (ELECT_TIMER_MS_MAX - ELECT_TIMER_MS_MIN)
-#define HEARTBEAT_TIMER_MS 100
+#define HEARTBEAT_TIMER_MS   900
 
 #define EMPTY_RAFT_ID ((SRaftId){.addr = 0, .vgId = 0})
 
diff --git a/source/libs/sync/inc/syncRaftLog.h b/source/libs/sync/inc/syncRaftLog.h
index aec1f77b420b595b0d0393e02f472de7f6eda101..f124867097c060fc89ffef405bde8ba7f547fb5b 100644
--- a/source/libs/sync/inc/syncRaftLog.h
+++ b/source/libs/sync/inc/syncRaftLog.h
@@ -26,11 +26,13 @@ extern "C" {
 #include "syncInt.h"
 #include "syncRaftEntry.h"
 #include "taosdef.h"
+#include "wal.h"
 
 typedef struct SSyncLogStoreData {
-  SSyncNode* pSyncNode;
-  SWal*      pWal;
-  SyncIndex  beginIndex;  // valid begin index, default 0, may be set beginIndex > 0
+  SSyncNode*      pSyncNode;
+  SWal*           pWal;
+  SWalReadHandle* pWalHandle;
+  // SyncIndex       beginIndex;  // valid begin index, default 0, may be set beginIndex > 0
 } SSyncLogStoreData;
 
 SSyncLogStore* logStoreCreate(SSyncNode* pSyncNode);
diff --git a/source/libs/sync/src/syncAppendEntries.c b/source/libs/sync/src/syncAppendEntries.c
index bc5342cc7e1fc441706f3758c50ec45ada5981b6..47d0976aca483ba40480fa730759fe3d1206f568 100644
--- a/source/libs/sync/src/syncAppendEntries.c
+++ b/source/libs/sync/src/syncAppendEntries.c
@@ -420,44 +420,26 @@ static int32_t syncNodePreCommit(SSyncNode* ths, SSyncRaftEntry* pEntry) {
 // prevLogIndex == -1
 static bool syncNodeOnAppendEntriesLogOK(SSyncNode* pSyncNode, SyncAppendEntries* pMsg) {
   if (pMsg->prevLogIndex == SYNC_INDEX_INVALID) {
-    if (gRaftDetailLog) {
-      sTrace("syncNodeOnAppendEntriesLogOK true, pMsg->prevLogIndex:%ld", pMsg->prevLogIndex);
-    }
     return true;
   }
 
   SyncIndex myLastIndex = syncNodeGetLastIndex(pSyncNode);
   if (pMsg->prevLogIndex > myLastIndex) {
-    if (gRaftDetailLog) {
-      sTrace("syncNodeOnAppendEntriesLogOK false, pMsg->prevLogIndex:%ld, myLastIndex:%ld", pMsg->prevLogIndex,
-             myLastIndex);
-    }
+    sDebug("vgId:%d sync log not ok, preindex:%ld", pSyncNode->vgId, pMsg->prevLogIndex);
     return false;
   }
 
   SyncTerm myPreLogTerm = syncNodeGetPreTerm(pSyncNode, pMsg->prevLogIndex + 1);
   if (myPreLogTerm == SYNC_TERM_INVALID) {
-    sError("vgId:%d sync get pre term error, preindex:%ld", pSyncNode->vgId, pMsg->prevLogIndex);
+    sDebug("vgId:%d sync log not ok2, preindex:%ld", pSyncNode->vgId, pMsg->prevLogIndex);
     return false;
   }
 
   if (pMsg->prevLogIndex <= myLastIndex && pMsg->prevLogTerm == myPreLogTerm) {
-    if (gRaftDetailLog) {
-      sTrace(
-          "syncNodeOnAppendEntriesLogOK true, pMsg->prevLogIndex:%ld, myLastIndex:%ld, pMsg->prevLogTerm:%lu, "
-          "myPreLogTerm:%lu",
-          pMsg->prevLogIndex, myLastIndex, pMsg->prevLogTerm, myPreLogTerm);
-    }
     return true;
   }
 
-  if (gRaftDetailLog) {
-    sTrace(
-        "syncNodeOnAppendEntriesLogOK false, pMsg->prevLogIndex:%ld, myLastIndex:%ld, pMsg->prevLogTerm:%lu, "
-        "myPreLogTerm:%lu",
-        pMsg->prevLogIndex, myLastIndex, pMsg->prevLogTerm, myPreLogTerm);
-  }
-
+  sDebug("vgId:%d sync log not ok3, preindex:%ld", pSyncNode->vgId, pMsg->prevLogIndex);
   return false;
 }
 
@@ -466,14 +448,11 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
   int32_t code = 0;
 
   // print log
-  char logBuf[128] = {0};
-  snprintf(logBuf, sizeof(logBuf), "recv SyncAppendEntries, vgId:%d, term:%lu", ths->vgId,
-           ths->pRaftStore->currentTerm);
-  syncAppendEntriesLog2(logBuf, pMsg);
+  syncAppendEntriesLog2("==syncNodeOnAppendEntriesSnapshotCb==", pMsg);
 
   // if already drop replica, do not process
   if (!syncNodeInRaftGroup(ths, &(pMsg->srcId)) && !ths->pRaftCfg->isStandBy) {
-    sInfo("recv SyncAppendEntries maybe replica already dropped");
+    syncNodeEventLog(ths, "recv sync-append-entries, maybe replica already dropped");
     return ret;
   }
 
@@ -497,7 +476,7 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
   do {
     bool condition = pMsg->term == ths->pRaftStore->currentTerm && ths->state == TAOS_SYNC_STATE_CANDIDATE;
     if (condition) {
-      sTrace("recv SyncAppendEntries, candidate to follower");
+      syncNodeEventLog(ths, "recv sync-append-entries, candidate to follower");
 
       syncNodeBecomeFollower(ths, "from candidate by append entries");
       // do not reply?
@@ -505,6 +484,7 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
     }
   } while (0);
 
+#if 0
   // fake match
   //
   // condition1:
@@ -530,7 +510,7 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
     bool condition0 = (pMsg->term == ths->pRaftStore->currentTerm) && (ths->state == TAOS_SYNC_STATE_FOLLOWER) &&
                       syncNodeHasSnapshot(ths);
     bool condition1 =
-        condition0 && (ths->pLogStore->syncLogEntryCount(ths->pLogStore) == 0) && (pMsg->prevLogIndex > myLastIndex);
+        condition0 && (ths->pLogStore->syncLogEntryCount(ths->pLogStore) == 0) && (pMsg->prevLogIndex > myLastIndex);   // donot use syncLogEntryCount!!! use isEmpty
     bool condition2 = condition0 && (ths->pLogStore->syncLogLastIndex(ths->pLogStore) <= snapshot.lastApplyIndex) &&
                       (pMsg->prevLogIndex > myLastIndex);
     bool condition3 = condition0 && (pMsg->prevLogIndex < snapshot.lastApplyIndex);
@@ -538,11 +518,10 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
     bool condition = condition1 || condition2 || condition3 || condition4;
 
     if (condition) {
-      sTrace(
-          "recv SyncAppendEntries, fake match, myLastIndex:%ld, syncLogBeginIndex:%ld, syncLogEndIndex:%ld, "
-          "condition1:%d, condition2:%d, condition3:%d, condition4:%d",
-          myLastIndex, ths->pLogStore->syncLogBeginIndex(ths->pLogStore),
-          ths->pLogStore->syncLogEndIndex(ths->pLogStore), condition1, condition2, condition3, condition4);
+      char logBuf[128];
+      snprintf(logBuf, sizeof(logBuf), "recv sync-append-entries, fake match, pre-index:%ld, pre-term:%lu",
+               pMsg->prevLogIndex, pMsg->prevLogTerm);
+      syncNodeEventLog(ths, logBuf);
 
       // prepare response msg
       SyncAppendEntriesReply* pReply = syncAppendEntriesReplyBuild(ths->vgId);
@@ -562,6 +541,7 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
       return ret;
     }
   } while (0);
+#endif
 
   // fake match2
   //
@@ -576,8 +556,13 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
     bool condition = (pMsg->term == ths->pRaftStore->currentTerm) && (ths->state == TAOS_SYNC_STATE_FOLLOWER) &&
                      (pMsg->prevLogIndex <= ths->commitIndex);
     if (condition) {
-      sTrace("recv SyncAppendEntries, fake match2, msg-prevLogIndex:%ld, my-commitIndex:%ld", pMsg->prevLogIndex,
-             ths->commitIndex);
+      do {
+        char logBuf[128];
+        snprintf(logBuf, sizeof(logBuf),
+                 "recv sync-append-entries, fake match2, pre-index:%ld, pre-term:%lu, datalen:%d", pMsg->prevLogIndex,
+                 pMsg->prevLogTerm, pMsg->dataLen);
+        syncNodeEventLog(ths, logBuf);
+      } while (0);
 
       SyncIndex matchIndex = ths->commitIndex;
       bool      hasAppendEntries = pMsg->dataLen > 0;
@@ -605,6 +590,7 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
         code = syncNodePreCommit(ths, pAppendEntry);
         ASSERT(code == 0);
 
+        // update match index
         matchIndex = pMsg->prevLogIndex + 1;
 
         syncEntryDestory(pAppendEntry);
@@ -650,11 +636,10 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
     bool condition = condition1 || condition2;
 
     if (condition) {
-      sTrace(
-          "recv SyncAppendEntries, not match, syncLogBeginIndex:%ld, syncLogEndIndex:%ld, condition1:%d, "
-          "condition2:%d, logOK:%d",
-          ths->pLogStore->syncLogBeginIndex(ths->pLogStore), ths->pLogStore->syncLogEndIndex(ths->pLogStore),
-          condition1, condition2, logOK);
+      char logBuf[128];
+      snprintf(logBuf, sizeof(logBuf), "recv sync-append-entries, not match, pre-index:%ld, pre-term:%lu, datalen:%d",
+               pMsg->prevLogIndex, pMsg->prevLogTerm, pMsg->dataLen);
+      syncNodeEventLog(ths, logBuf);
 
       // prepare response msg
       SyncAppendEntriesReply* pReply = syncAppendEntriesReplyBuild(ths->vgId);
@@ -693,8 +678,10 @@ int32_t syncNodeOnAppendEntriesSnapshotCb(SSyncNode* ths, SyncAppendEntries* pMs
       // has entries in SyncAppendEntries msg
       bool hasAppendEntries = pMsg->dataLen > 0;
 
-      sTrace("recv SyncAppendEntries, match, myLastIndex:%ld, hasExtraEntries:%d, hasAppendEntries:%d", myLastIndex,
-             hasExtraEntries, hasAppendEntries);
+      char logBuf[128];
+      snprintf(logBuf, sizeof(logBuf), "recv sync-append-entries, match, pre-index:%ld, pre-term:%lu, datalen:%d",
+               pMsg->prevLogIndex, pMsg->prevLogTerm, pMsg->dataLen);
+      syncNodeEventLog(ths, logBuf);
 
       if (hasExtraEntries) {
         // make log same, rollback deleted entries
diff --git a/source/libs/sync/src/syncAppendEntriesReply.c b/source/libs/sync/src/syncAppendEntriesReply.c
index f13a3604dab1e776583164c0315b243a6a766665..6ca356b4f6049e602e698ca46802d49237bce32c 100644
--- a/source/libs/sync/src/syncAppendEntriesReply.c
+++ b/source/libs/sync/src/syncAppendEntriesReply.c
@@ -101,32 +101,27 @@ int32_t syncNodeOnAppendEntriesReplySnapshotCb(SSyncNode* ths, SyncAppendEntries
   int32_t ret = 0;
 
   // print log
-  char logBuf[128] = {0};
-  snprintf(logBuf, sizeof(logBuf), "recv SyncAppendEntriesReply, vgId:%d, term:%lu", ths->vgId,
-           ths->pRaftStore->currentTerm);
-  syncAppendEntriesReplyLog2(logBuf, pMsg);
+  syncAppendEntriesReplyLog2("==syncNodeOnAppendEntriesReplySnapshotCb==", pMsg);
 
   // if already drop replica, do not process
   if (!syncNodeInRaftGroup(ths, &(pMsg->srcId)) && !ths->pRaftCfg->isStandBy) {
-    sInfo("recv SyncAppendEntriesReply,  maybe replica already dropped");
-    return ret;
+    syncNodeEventLog(ths, "recv sync-append-entries-reply,  maybe replica already dropped");
+    return 0;
   }
 
   // drop stale response
   if (pMsg->term < ths->pRaftStore->currentTerm) {
-    sTrace("recv SyncAppendEntriesReply, drop stale response, receive_term:%lu current_term:%lu", pMsg->term,
-           ths->pRaftStore->currentTerm);
-    return ret;
+    char logBuf[128];
+    snprintf(logBuf, sizeof(logBuf), "recv sync-append-entries-reply, recv-term:%lu, drop stale response", pMsg->term);
+    syncNodeEventLog(ths, logBuf);
+    return 0;
   }
 
-  syncIndexMgrLog2("recv SyncAppendEntriesReply, before pNextIndex:", ths->pNextIndex);
-  syncIndexMgrLog2("recv SyncAppendEntriesReply, before pMatchIndex:", ths->pMatchIndex);
   if (gRaftDetailLog) {
-    SSnapshot snapshot;
-    ths->pFsm->FpGetSnapshotInfo(ths->pFsm, &snapshot);
-    sTrace("recv SyncAppendEntriesReply, before snapshot.lastApplyIndex:%ld, snapshot.lastApplyTerm:%lu",
-           snapshot.lastApplyIndex, snapshot.lastApplyTerm);
+    syncNodeEventLog(ths, "recv sync-append-entries-reply, before");
   }
+  syncIndexMgrLog2("recv sync-append-entries-reply, before pNextIndex:", ths->pNextIndex);
+  syncIndexMgrLog2("recv sync-append-entries-reply, before pMatchIndex:", ths->pMatchIndex);
 
   // no need this code, because if I receive reply.term, then I must have sent for that term.
   //  if (pMsg->term > ths->pRaftStore->currentTerm) {
@@ -134,12 +129,10 @@ int32_t syncNodeOnAppendEntriesReplySnapshotCb(SSyncNode* ths, SyncAppendEntries
   //  }
 
   if (pMsg->term > ths->pRaftStore->currentTerm) {
-    char logBuf[128] = {0};
-    snprintf(logBuf, sizeof(logBuf), "recv SyncAppendEntriesReply, error term, receive_term:%lu current_term:%lu",
-             pMsg->term, ths->pRaftStore->currentTerm);
-    syncNodeLog2(logBuf, ths);
-    sError("%s", logBuf);
-    return ret;
+    char logBuf[128];
+    snprintf(logBuf, sizeof(logBuf), "recv sync-append-entries-reply, error term, recv-term:%lu", pMsg->term);
+    syncNodeErrorLog(ths, logBuf);
+    return -1;
   }
 
   ASSERT(pMsg->term == ths->pRaftStore->currentTerm);
@@ -228,8 +221,11 @@ int32_t syncNodeOnAppendEntriesReplySnapshotCb(SSyncNode* ths, SyncAppendEntries
     }
   }
 
-  syncIndexMgrLog2("recv SyncAppendEntriesReply, after pNextIndex:", ths->pNextIndex);
-  syncIndexMgrLog2("recv SyncAppendEntriesReply, after pMatchIndex:", ths->pMatchIndex);
+  if (gRaftDetailLog) {
+    syncNodeEventLog(ths, "recv sync-append-entries-reply, after");
+  }
+  syncIndexMgrLog2("recv sync-append-entries-reply, after pNextIndex:", ths->pNextIndex);
+  syncIndexMgrLog2("recv sync-append-entries-reply, after pMatchIndex:", ths->pMatchIndex);
 
   return ret;
 }
\ No newline at end of file
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index 732f450f4cfd41fafe1ff72503fbf4f0ac63633b..8bbee65369e51467ad054334250ddd3bad81ebd4 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -416,7 +416,7 @@ int32_t syncGetSnapshotMetaByIndex(int64_t rid, SyncIndex snapshotIndex, struct
     }
   }
   sMeta->lastConfigIndex = lastIndex;
-  sTrace("vgId:%d, get snapshot meta by index:%" PRId64 " lastConfigIndex:%" PRId64, pSyncNode->vgId, snapshotIndex,
+  sTrace("vgId:%d, get snapshot meta by index:%" PRId64 " lcindex:%" PRId64, pSyncNode->vgId, snapshotIndex,
          sMeta->lastConfigIndex);
 
   taosReleaseRef(tsNodeRefId, pSyncNode->rid);
@@ -433,8 +433,9 @@ SyncIndex syncNodeGetSnapshotConfigIndex(SSyncNode* pSyncNode, SyncIndex snapsho
       lastIndex = (pSyncNode->pRaftCfg->configIndexArr)[i];
     }
   }
+  sTrace("vgId:%d, sync get snapshot last config index, index:%ld lcindex:%ld", pSyncNode->vgId, snapshotLastApplyIndex,
+         lastIndex);
 
-  sTrace("sync syncNodeGetSnapshotConfigIndex index:%ld lastConfigIndex:%ld", snapshotLastApplyIndex, lastIndex);
   return lastIndex;
 }
 
@@ -1310,6 +1311,10 @@ void syncNodeEventLog(const SSyncNode* pSyncNode, char* str) {
   SyncIndex logBeginIndex = pSyncNode->pLogStore->syncLogBeginIndex(pSyncNode->pLogStore);
 
   char* pCfgStr = syncCfg2SimpleStr(&(pSyncNode->pRaftCfg->cfg));
+  char* printStr = "";
+  if (pCfgStr != NULL) {
+    printStr = pCfgStr;
+  }
 
   if (userStrLen < 256) {
     char logBuf[256 + 256];
@@ -1321,7 +1326,7 @@ void syncNodeEventLog(const SSyncNode* pSyncNode, char* str) {
                pSyncNode->vgId, syncUtilState2String(pSyncNode->state), str, pSyncNode->pRaftStore->currentTerm,
                pSyncNode->commitIndex, logBeginIndex, logLastIndex, snapshot.lastApplyIndex,
                pSyncNode->pRaftCfg->isStandBy, pSyncNode->replicaNum, pSyncNode->pRaftCfg->lastConfigIndex,
-               pSyncNode->changing, pCfgStr);
+               pSyncNode->changing, printStr);
     } else {
       snprintf(logBuf, sizeof(logBuf), "%s", str);
     }
@@ -1338,7 +1343,7 @@ void syncNodeEventLog(const SSyncNode* pSyncNode, char* str) {
                pSyncNode->vgId, syncUtilState2String(pSyncNode->state), str, pSyncNode->pRaftStore->currentTerm,
                pSyncNode->commitIndex, logBeginIndex, logLastIndex, snapshot.lastApplyIndex,
                pSyncNode->pRaftCfg->isStandBy, pSyncNode->replicaNum, pSyncNode->pRaftCfg->lastConfigIndex,
-               pSyncNode->changing, pCfgStr);
+               pSyncNode->changing, printStr);
     } else {
       snprintf(s, len, "%s", str);
     }
@@ -1957,17 +1962,21 @@ SyncTerm syncNodeGetPreTerm(SSyncNode* pSyncNode, SyncIndex index) {
     taosMemoryFree(pPreEntry);
     return preTerm;
   } else {
-    if (terrno == TSDB_CODE_WAL_LOG_NOT_EXIST) {
-      SSnapshot snapshot = {.data = NULL, .lastApplyIndex = -1, .lastApplyTerm = 0, .lastConfigIndex = -1};
-      if (pSyncNode->pFsm->FpGetSnapshotInfo != NULL) {
-        pSyncNode->pFsm->FpGetSnapshotInfo(pSyncNode->pFsm, &snapshot);
-        if (snapshot.lastApplyIndex == preIndex) {
-          return snapshot.lastApplyTerm;
-        }
+    SSnapshot snapshot = {.data = NULL, .lastApplyIndex = -1, .lastApplyTerm = 0, .lastConfigIndex = -1};
+    if (pSyncNode->pFsm->FpGetSnapshotInfo != NULL) {
+      pSyncNode->pFsm->FpGetSnapshotInfo(pSyncNode->pFsm, &snapshot);
+      if (snapshot.lastApplyIndex == preIndex) {
+        return snapshot.lastApplyTerm;
       }
     }
   }
 
+  do {
+    char logBuf[128];
+    snprintf(logBuf, sizeof(logBuf), "sync node get pre term error, index:%ld", index);
+    syncNodeErrorLog(pSyncNode, logBuf);
+  } while (0);
+
   return SYNC_TERM_INVALID;
 }
 
diff --git a/source/libs/sync/src/syncRaftCfg.c b/source/libs/sync/src/syncRaftCfg.c
index 2cc1eb023991e1b31d4b803fa5845fc284147054..f40eff57d9d4304bad850369cf332e68b12a0ec7 100644
--- a/source/libs/sync/src/syncRaftCfg.c
+++ b/source/libs/sync/src/syncRaftCfg.c
@@ -107,26 +107,30 @@ char *syncCfg2Str(SSyncCfg *pSyncCfg) {
 }
 
 char *syncCfg2SimpleStr(SSyncCfg *pSyncCfg) {
-  int32_t len = 512;
-  char   *s = taosMemoryMalloc(len);
-  memset(s, 0, len);
-
-  snprintf(s, len, "{replica-num:%d, my-index:%d, ", pSyncCfg->replicaNum, pSyncCfg->myIndex);
-  char *p = s + strlen(s);
-  for (int i = 0; i < pSyncCfg->replicaNum; ++i) {
-    /*
-    if (p + 128 + 32 > s + len) {
-      break;
+  if (pSyncCfg != NULL) {
+    int32_t len = 512;
+    char   *s = taosMemoryMalloc(len);
+    memset(s, 0, len);
+
+    snprintf(s, len, "{replica-num:%d, my-index:%d, ", pSyncCfg->replicaNum, pSyncCfg->myIndex);
+    char *p = s + strlen(s);
+    for (int i = 0; i < pSyncCfg->replicaNum; ++i) {
+      /*
+      if (p + 128 + 32 > s + len) {
+        break;
+      }
+      */
+      char buf[128 + 32];
+      snprintf(buf, sizeof(buf), "%s:%d, ", pSyncCfg->nodeInfo[i].nodeFqdn, pSyncCfg->nodeInfo[i].nodePort);
+      strncpy(p, buf, sizeof(buf));
+      p = s + strlen(s);
     }
-    */
-    char buf[128 + 32];
-    snprintf(buf, sizeof(buf), "%s:%d, ", pSyncCfg->nodeInfo[i].nodeFqdn, pSyncCfg->nodeInfo[i].nodePort);
-    strncpy(p, buf, sizeof(buf));
-    p = s + strlen(s);
+    strcpy(p - 2, "}");
+
+    return s;
   }
-  strcpy(p - 2, "}");
 
-  return s;
+  return NULL;
 }
 
 int32_t syncCfgFromJson(const cJSON *pRoot, SSyncCfg *pSyncCfg) {
diff --git a/source/libs/sync/src/syncRaftLog.c b/source/libs/sync/src/syncRaftLog.c
index 701b4a7b93bd6c9db05df9152339fa8f393ca95f..cc606f4df884bfd19902c9f775e35e98dc99aa0e 100644
--- a/source/libs/sync/src/syncRaftLog.c
+++ b/source/libs/sync/src/syncRaftLog.c
@@ -16,10 +16,10 @@
 #include "syncRaftLog.h"
 #include "syncRaftCfg.h"
 #include "syncRaftStore.h"
-#include "wal.h"
 
 // refactor, log[0 .. n] ==> log[m .. n]
-static int32_t   raftLogSetBeginIndex(struct SSyncLogStore* pLogStore, SyncIndex beginIndex);
+static int32_t raftLogRestoreFromSnapshot(struct SSyncLogStore* pLogStore, SyncIndex snapshotIndex);
+// static int32_t   raftLogSetBeginIndex(struct SSyncLogStore* pLogStore, SyncIndex beginIndex);
 static SyncIndex raftLogBeginIndex(struct SSyncLogStore* pLogStore);
 static SyncIndex raftLogEndIndex(struct SSyncLogStore* pLogStore);
 static SyncIndex raftLogWriteIndex(struct SSyncLogStore* pLogStore);
@@ -45,31 +45,43 @@ static int32_t         logStoreUpdateCommitIndex(SSyncLogStore* pLogStore, SyncI
 static SyncIndex       logStoreGetCommitIndex(SSyncLogStore* pLogStore);
 
 // refactor, log[0 .. n] ==> log[m .. n]
+/*
 static int32_t raftLogSetBeginIndex(struct SSyncLogStore* pLogStore, SyncIndex beginIndex) {
-  sTrace("raftLogSetBeginIndex beginIndex:%ld", beginIndex);
-
   // if beginIndex == 0, donot need call this funciton
   ASSERT(beginIndex > 0);
 
   SSyncLogStoreData* pData = pLogStore->data;
   SWal*              pWal = pData->pWal;
+  sTrace("vgId:%d, reset wal begin index:%ld", pData->pSyncNode->vgId, beginIndex);
+
   pData->beginIndex = beginIndex;
   walRestoreFromSnapshot(pWal, beginIndex - 1);
   return 0;
 }
+*/
+
+static int32_t raftLogRestoreFromSnapshot(struct SSyncLogStore* pLogStore, SyncIndex snapshotIndex) {
+  ASSERT(snapshotIndex >= 0);
+
+  SSyncLogStoreData* pData = pLogStore->data;
+  SWal*              pWal = pData->pWal;
+  walRestoreFromSnapshot(pWal, snapshotIndex);
+  return 0;
+}
 
 static SyncIndex raftLogBeginIndex(struct SSyncLogStore* pLogStore) {
   SSyncLogStoreData* pData = pLogStore->data;
   SWal*              pWal = pData->pWal;
-  return pData->beginIndex;
+  SyncIndex          firstVer = walGetFirstVer(pWal);
+  return firstVer;
 }
 
 static SyncIndex raftLogEndIndex(struct SSyncLogStore* pLogStore) { return raftLogLastIndex(pLogStore); }
 
 static bool raftLogIsEmpty(struct SSyncLogStore* pLogStore) {
-  SyncIndex beginIndex = raftLogBeginIndex(pLogStore);
-  SyncIndex endIndex = raftLogEndIndex(pLogStore);
-  return (endIndex < beginIndex);
+  SSyncLogStoreData* pData = pLogStore->data;
+  SWal*              pWal = pData->pWal;
+  return walIsEmpty(pWal);
 }
 
 static int32_t raftLogEntryCount(struct SSyncLogStore* pLogStore) {
@@ -96,23 +108,8 @@ static SyncIndex raftLogLastIndex(struct SSyncLogStore* pLogStore) {
   SSyncLogStoreData* pData = pLogStore->data;
   SWal*              pWal = pData->pWal;
   SyncIndex          lastVer = walGetLastVer(pWal);
-  SyncIndex          firstVer = walGetFirstVer(pWal);
-
-  if (lastVer < firstVer) {
-    // no record
-    lastIndex = -1;
 
-  } else {
-    if (firstVer >= 0) {
-      lastIndex = lastVer;
-    } else if (firstVer == -1) {
-      lastIndex = -1;
-    } else {
-      ASSERT(0);
-    }
-  }
-
-  return lastIndex;
+  return lastVer;
 }
 
 static SyncIndex raftLogWriteIndex(struct SSyncLogStore* pLogStore) {
@@ -122,6 +119,26 @@ static SyncIndex raftLogWriteIndex(struct SSyncLogStore* pLogStore) {
   return lastVer + 1;
 }
 
+static SyncTerm raftLogLastTerm(struct SSyncLogStore* pLogStore) {
+  SSyncLogStoreData* pData = pLogStore->data;
+  SWal*              pWal = pData->pWal;
+  if (walIsEmpty(pWal)) {
+    return 0;
+  } else {
+    SSyncRaftEntry* pLastEntry;
+    int32_t         code = raftLogGetLastEntry(pLogStore, &pLastEntry);
+    ASSERT(code == 0);
+    ASSERT(pLastEntry != NULL);
+
+    SyncTerm lastTerm = pLastEntry->term;
+    taosMemoryFree(pLastEntry);
+    return lastTerm;
+  }
+
+  return 0;
+}
+
+/*
 static SyncTerm raftLogLastTerm(struct SSyncLogStore* pLogStore) {
   SyncTerm lastTerm = 0;
   if (raftLogEntryCount(pLogStore) == 0) {
@@ -137,6 +154,7 @@ static SyncTerm raftLogLastTerm(struct SSyncLogStore* pLogStore) {
   }
   return lastTerm;
 }
+*/
 
 static int32_t raftLogAppendEntry(struct SSyncLogStore* pLogStore, SSyncRaftEntry* pEntry) {
   SSyncLogStoreData* pData = pLogStore->data;
@@ -160,8 +178,12 @@ static int32_t raftLogAppendEntry(struct SSyncLogStore* pLogStore, SSyncRaftEntr
     const char* errStr = tstrerror(err);
     int32_t     sysErr = errno;
     const char* sysErrStr = strerror(errno);
-    sError("vgId:%d wal write error, index:%ld, err:%d %X, msg:%s, syserr:%d, sysmsg:%s", pData->pSyncNode->vgId,
-           pEntry->index, err, err, errStr, sysErr, sysErrStr);
+
+    char logBuf[128];
+    snprintf(logBuf, sizeof(logBuf), "wal write error, index:%ld, err:%d %X, msg:%s, syserr:%d, sysmsg:%s",
+             pEntry->index, err, err, errStr, sysErr, sysErrStr);
+    syncNodeErrorLog(pData->pSyncNode, logBuf);
+
     ASSERT(0);
   }
 
@@ -229,7 +251,8 @@ static int32_t raftLogGetEntry(struct SSyncLogStore* pLogStore, SyncIndex index,
 
   *ppEntry = NULL;
 
-  SWalReadHandle* pWalHandle = walOpenReadHandle(pWal);
+  // SWalReadHandle* pWalHandle = walOpenReadHandle(pWal);
+  SWalReadHandle* pWalHandle = pData->pWalHandle;
   if (pWalHandle == NULL) {
     return -1;
   }
@@ -240,12 +263,23 @@ static int32_t raftLogGetEntry(struct SSyncLogStore* pLogStore, SyncIndex index,
     const char* errStr = tstrerror(err);
     int32_t     sysErr = errno;
     const char* sysErrStr = strerror(errno);
-    sError("vgId:%d wal read error, index:%ld, err:%d %X, msg:%s, syserr:%d, sysmsg:%s", pData->pSyncNode->vgId, index,
-           err, err, errStr, sysErr, sysErrStr);
 
-    int32_t saveErr = terrno;
-    walCloseReadHandle(pWalHandle);
-    terrno = saveErr;
+    do {
+      char logBuf[128];
+      snprintf(logBuf, sizeof(logBuf), "wal read error, index:%ld, err:%d %X, msg:%s, syserr:%d, sysmsg:%s", index, err,
+               err, errStr, sysErr, sysErrStr);
+      if (terrno == TSDB_CODE_WAL_LOG_NOT_EXIST) {
+        syncNodeEventLog(pData->pSyncNode, logBuf);
+      } else {
+        syncNodeErrorLog(pData->pSyncNode, logBuf);
+      }
+    } while (0);
+
+    /*
+        int32_t saveErr = terrno;
+        walCloseReadHandle(pWalHandle);
+        terrno = saveErr;
+    */
 
     return code;
   }
@@ -261,9 +295,11 @@ static int32_t raftLogGetEntry(struct SSyncLogStore* pLogStore, SyncIndex index,
   ASSERT((*ppEntry)->dataLen == pWalHandle->pHead->head.bodyLen);
   memcpy((*ppEntry)->data, pWalHandle->pHead->head.body, pWalHandle->pHead->head.bodyLen);
 
-  int32_t saveErr = terrno;
-  walCloseReadHandle(pWalHandle);
-  terrno = saveErr;
+  /*
+    int32_t saveErr = terrno;
+    walCloseReadHandle(pWalHandle);
+    terrno = saveErr;
+  */
 
   return code;
 }
@@ -285,6 +321,25 @@ static int32_t raftLogTruncate(struct SSyncLogStore* pLogStore, SyncIndex fromIn
   return code;
 }
 
+static int32_t raftLogGetLastEntry(SSyncLogStore* pLogStore, SSyncRaftEntry** ppLastEntry) {
+  SSyncLogStoreData* pData = pLogStore->data;
+  SWal*              pWal = pData->pWal;
+  ASSERT(ppLastEntry != NULL);
+
+  *ppLastEntry = NULL;
+  if (walIsEmpty(pWal)) {
+    terrno = TSDB_CODE_WAL_LOG_NOT_EXIST;
+    return -1;
+  } else {
+    SyncIndex lastIndex = raftLogLastIndex(pLogStore);
+    int32_t   code = raftLogGetEntry(pLogStore, lastIndex, ppLastEntry);
+    return code;
+  }
+
+  return -1;
+}
+
+/*
 static int32_t raftLogGetLastEntry(SSyncLogStore* pLogStore, SSyncRaftEntry** ppLastEntry) {
   *ppLastEntry = NULL;
   if (raftLogEntryCount(pLogStore) == 0) {
@@ -294,6 +349,7 @@ static int32_t raftLogGetLastEntry(SSyncLogStore* pLogStore, SSyncRaftEntry** pp
   int32_t   code = raftLogGetEntry(pLogStore, lastIndex, ppLastEntry);
   return code;
 }
+*/
 
 //-------------------------------
 SSyncLogStore* logStoreCreate(SSyncNode* pSyncNode) {
@@ -306,16 +362,22 @@ SSyncLogStore* logStoreCreate(SSyncNode* pSyncNode) {
   SSyncLogStoreData* pData = pLogStore->data;
   pData->pSyncNode = pSyncNode;
   pData->pWal = pSyncNode->pWal;
+  ASSERT(pData->pWal != NULL);
 
-  SyncIndex firstVer = walGetFirstVer(pData->pWal);
-  SyncIndex lastVer = walGetLastVer(pData->pWal);
-  if (firstVer >= 0) {
-    pData->beginIndex = firstVer;
-  } else if (firstVer == -1) {
-    pData->beginIndex = lastVer + 1;
-  } else {
-    ASSERT(0);
-  }
+  pData->pWalHandle = walOpenReadHandle(pData->pWal);
+  ASSERT(pData->pWalHandle != NULL);
+
+  /*
+    SyncIndex firstVer = walGetFirstVer(pData->pWal);
+    SyncIndex lastVer = walGetLastVer(pData->pWal);
+    if (firstVer >= 0) {
+      pData->beginIndex = firstVer;
+    } else if (firstVer == -1) {
+      pData->beginIndex = lastVer + 1;
+    } else {
+      ASSERT(0);
+    }
+  */
 
   pLogStore->appendEntry = logStoreAppendEntry;
   pLogStore->getEntry = logStoreGetEntry;
@@ -325,7 +387,8 @@ SSyncLogStore* logStoreCreate(SSyncNode* pSyncNode) {
   pLogStore->updateCommitIndex = logStoreUpdateCommitIndex;
   pLogStore->getCommitIndex = logStoreGetCommitIndex;
 
-  pLogStore->syncLogSetBeginIndex = raftLogSetBeginIndex;
+  // pLogStore->syncLogSetBeginIndex = raftLogSetBeginIndex;
+  pLogStore->syncLogRestoreFromSnapshot = raftLogRestoreFromSnapshot;
   pLogStore->syncLogBeginIndex = raftLogBeginIndex;
   pLogStore->syncLogEndIndex = raftLogEndIndex;
   pLogStore->syncLogIsEmpty = raftLogIsEmpty;
@@ -344,6 +407,11 @@ SSyncLogStore* logStoreCreate(SSyncNode* pSyncNode) {
 
 void logStoreDestory(SSyncLogStore* pLogStore) {
   if (pLogStore != NULL) {
+    SSyncLogStoreData* pData = pLogStore->data;
+    if (pData->pWalHandle != NULL) {
+      walCloseReadHandle(pData->pWalHandle);
+    }
+
     taosMemoryFree(pLogStore->data);
     taosMemoryFree(pLogStore);
   }
@@ -368,8 +436,11 @@ int32_t logStoreAppendEntry(SSyncLogStore* pLogStore, SSyncRaftEntry* pEntry) {
     const char* errStr = tstrerror(err);
     int32_t     sysErr = errno;
     const char* sysErrStr = strerror(errno);
-    sError("vgId:%d wal write error, index:%ld, err:%d %X, msg:%s, syserr:%d, sysmsg:%s", pData->pSyncNode->vgId,
-           pEntry->index, err, err, errStr, sysErr, sysErrStr);
+
+    char logBuf[128];
+    snprintf(logBuf, sizeof(logBuf), "wal write error, index:%ld, err:%d %X, msg:%s, syserr:%d, sysmsg:%s",
+             pEntry->index, err, err, errStr, sysErr, sysErrStr);
+    syncNodeErrorLog(pData->pSyncNode, logBuf);
 
     ASSERT(0);
   }
@@ -389,7 +460,8 @@ SSyncRaftEntry* logStoreGetEntry(SSyncLogStore* pLogStore, SyncIndex index) {
   SWal*              pWal = pData->pWal;
 
   if (index >= SYNC_INDEX_BEGIN && index <= logStoreLastIndex(pLogStore)) {
-    SWalReadHandle* pWalHandle = walOpenReadHandle(pWal);
+    // SWalReadHandle* pWalHandle = walOpenReadHandle(pWal);
+    SWalReadHandle* pWalHandle = pData->pWalHandle;
     ASSERT(pWalHandle != NULL);
 
     int32_t code = walReadWithHandle(pWalHandle, index);
@@ -398,12 +470,20 @@ SSyncRaftEntry* logStoreGetEntry(SSyncLogStore* pLogStore, SyncIndex index) {
       const char* errStr = tstrerror(err);
       int32_t     sysErr = errno;
       const char* sysErrStr = strerror(errno);
-      sError("vgId:%d wal read error, index:%ld, err:%d %X, msg:%s, syserr:%d, sysmsg:%s", pData->pSyncNode->vgId,
-             index, err, err, errStr, sysErr, sysErrStr);
+
+      do {
+        char logBuf[128];
+        snprintf(logBuf, sizeof(logBuf), "wal read error, index:%ld, err:%d %X, msg:%s, syserr:%d, sysmsg:%s", index,
+                 err, err, errStr, sysErr, sysErrStr);
+        if (terrno == TSDB_CODE_WAL_LOG_NOT_EXIST) {
+          syncNodeEventLog(pData->pSyncNode, logBuf);
+        } else {
+          syncNodeErrorLog(pData->pSyncNode, logBuf);
+        }
+      } while (0);
 
       ASSERT(0);
     }
-    // ASSERT(walReadWithHandle(pWalHandle, index) == 0);
 
     SSyncRaftEntry* pEntry = syncEntryBuild(pWalHandle->pHead->head.bodyLen);
     ASSERT(pEntry != NULL);
@@ -417,9 +497,11 @@ SSyncRaftEntry* logStoreGetEntry(SSyncLogStore* pLogStore, SyncIndex index) {
     ASSERT(pEntry->dataLen == pWalHandle->pHead->head.bodyLen);
     memcpy(pEntry->data, pWalHandle->pHead->head.body, pWalHandle->pHead->head.bodyLen);
 
-    int32_t saveErr = terrno;
-    walCloseReadHandle(pWalHandle);
-    terrno = saveErr;
+    /*
+        int32_t saveErr = terrno;
+        walCloseReadHandle(pWalHandle);
+        terrno = saveErr;
+    */
 
     return pEntry;
 
@@ -498,6 +580,7 @@ SSyncRaftEntry* logStoreGetLastEntry(SSyncLogStore* pLogStore) {
   return pEntry;
 }
 
+/*
 cJSON* logStore2Json(SSyncLogStore* pLogStore) {
   char               u64buf[128] = {0};
   SSyncLogStoreData* pData = (SSyncLogStoreData*)pLogStore->data;
@@ -544,6 +627,57 @@ cJSON* logStore2Json(SSyncLogStore* pLogStore) {
   cJSON_AddItemToObject(pJson, "SSyncLogStore", pRoot);
   return pJson;
 }
+*/
+
+cJSON* logStore2Json(SSyncLogStore* pLogStore) {
+  char               u64buf[128] = {0};
+  SSyncLogStoreData* pData = (SSyncLogStoreData*)pLogStore->data;
+  cJSON*             pRoot = cJSON_CreateObject();
+
+  if (pData != NULL && pData->pWal != NULL) {
+    snprintf(u64buf, sizeof(u64buf), "%p", pData->pSyncNode);
+    cJSON_AddStringToObject(pRoot, "pSyncNode", u64buf);
+    snprintf(u64buf, sizeof(u64buf), "%p", pData->pWal);
+    cJSON_AddStringToObject(pRoot, "pWal", u64buf);
+
+    SyncIndex beginIndex = raftLogBeginIndex(pLogStore);
+    snprintf(u64buf, sizeof(u64buf), "%ld", beginIndex);
+    cJSON_AddStringToObject(pRoot, "beginIndex", u64buf);
+
+    SyncIndex endIndex = raftLogEndIndex(pLogStore);
+    snprintf(u64buf, sizeof(u64buf), "%ld", endIndex);
+    cJSON_AddStringToObject(pRoot, "endIndex", u64buf);
+
+    int32_t count = raftLogEntryCount(pLogStore);
+    cJSON_AddNumberToObject(pRoot, "entryCount", count);
+
+    snprintf(u64buf, sizeof(u64buf), "%ld", raftLogWriteIndex(pLogStore));
+    cJSON_AddStringToObject(pRoot, "WriteIndex", u64buf);
+
+    snprintf(u64buf, sizeof(u64buf), "%d", raftLogIsEmpty(pLogStore));
+    cJSON_AddStringToObject(pRoot, "IsEmpty", u64buf);
+
+    snprintf(u64buf, sizeof(u64buf), "%ld", raftLogLastIndex(pLogStore));
+    cJSON_AddStringToObject(pRoot, "LastIndex", u64buf);
+    snprintf(u64buf, sizeof(u64buf), "%lu", raftLogLastTerm(pLogStore));
+    cJSON_AddStringToObject(pRoot, "LastTerm", u64buf);
+
+    cJSON* pEntries = cJSON_CreateArray();
+    cJSON_AddItemToObject(pRoot, "pEntries", pEntries);
+
+    if (!raftLogIsEmpty(pLogStore)) {
+      for (SyncIndex i = beginIndex; i <= endIndex; ++i) {
+        SSyncRaftEntry* pEntry = logStoreGetEntry(pLogStore, i);
+        cJSON_AddItemToArray(pEntries, syncEntry2Json(pEntry));
+        syncEntryDestory(pEntry);
+      }
+    }
+  }
+
+  cJSON* pJson = cJSON_CreateObject();
+  cJSON_AddItemToObject(pJson, "SSyncLogStore", pRoot);
+  return pJson;
+}
 
 char* logStore2Str(SSyncLogStore* pLogStore) {
   cJSON* pJson = logStore2Json(pLogStore);
@@ -563,7 +697,8 @@ cJSON* logStoreSimple2Json(SSyncLogStore* pLogStore) {
     snprintf(u64buf, sizeof(u64buf), "%p", pData->pWal);
     cJSON_AddStringToObject(pRoot, "pWal", u64buf);
 
-    snprintf(u64buf, sizeof(u64buf), "%ld", pData->beginIndex);
+    SyncIndex beginIndex = raftLogBeginIndex(pLogStore);
+    snprintf(u64buf, sizeof(u64buf), "%ld", beginIndex);
     cJSON_AddStringToObject(pRoot, "beginIndex", u64buf);
 
     SyncIndex endIndex = raftLogEndIndex(pLogStore);
diff --git a/source/libs/sync/src/syncReplication.c b/source/libs/sync/src/syncReplication.c
index c378926e286761ef17508840d198e13eca601792..02cd977e1e65a29a0249584a18de2dd126f85787 100644
--- a/source/libs/sync/src/syncReplication.c
+++ b/source/libs/sync/src/syncReplication.c
@@ -219,6 +219,17 @@ int32_t syncNodeReplicate(SSyncNode* pSyncNode) {
 int32_t syncNodeAppendEntries(SSyncNode* pSyncNode, const SRaftId* destRaftId, const SyncAppendEntries* pMsg) {
   int32_t ret = 0;
 
+  do {
+    char     host[128];
+    uint16_t port;
+    syncUtilU642Addr(destRaftId->addr, host, sizeof(host), &port);
+    sDebug(
+        "vgId:%d, send sync-append-entries to %s:%d, term:%lu, pre-index:%ld, pre-term:%lu, pterm:%lu, commit:%ld, "
+        "datalen:%d",
+        pSyncNode->vgId, host, port, pMsg->term, pMsg->prevLogIndex, pMsg->prevLogTerm, pMsg->privateTerm,
+        pMsg->commitIndex, pMsg->dataLen);
+  } while (0);
+
   SRpcMsg rpcMsg;
   syncAppendEntries2RpcMsg(pMsg, &rpcMsg);
   syncNodeSendMsgById(destRaftId, pSyncNode, &rpcMsg);
diff --git a/source/libs/sync/src/syncSnapshot.c b/source/libs/sync/src/syncSnapshot.c
index ed9d62fd149d94c89f12c6f99518359ba2ac77ed..4fc01284007ec389888b4dc160f68fc1dc954523 100644
--- a/source/libs/sync/src/syncSnapshot.c
+++ b/source/libs/sync/src/syncSnapshot.c
@@ -545,7 +545,8 @@ int32_t syncNodeOnSnapshotSendCb(SSyncNode *pSyncNode, SyncSnapshotSend *pMsg) {
           pReceiver->pSyncNode->commitIndex = pReceiver->snapshot.lastApplyIndex;
         }
 
-        pSyncNode->pLogStore->syncLogSetBeginIndex(pSyncNode->pLogStore, pMsg->lastIndex + 1);
+        // pSyncNode->pLogStore->syncLogSetBeginIndex(pSyncNode->pLogStore, pMsg->lastIndex + 1);
+        pSyncNode->pLogStore->syncLogRestoreFromSnapshot(pSyncNode->pLogStore, pMsg->lastIndex);
 
         // maybe update lastconfig
         if (pMsg->lastConfigIndex >= SYNC_INDEX_BEGIN) {
diff --git a/source/libs/sync/test/syncRaftLogTest2.cpp b/source/libs/sync/test/syncRaftLogTest2.cpp
index bd6fa7c2c3c5616b206540e63e0b52821608691f..e3ceae061535bdcdb579ba83465803a3eac7b096 100644
--- a/source/libs/sync/test/syncRaftLogTest2.cpp
+++ b/source/libs/sync/test/syncRaftLogTest2.cpp
@@ -113,7 +113,8 @@ void test2() {
   pLogStore = logStoreCreate(pSyncNode);
   assert(pLogStore);
   pSyncNode->pLogStore = pLogStore;
-  pLogStore->syncLogSetBeginIndex(pLogStore, 5);
+  //pLogStore->syncLogSetBeginIndex(pLogStore, 5);
+  pLogStore->syncLogRestoreFromSnapshot(pLogStore, 4);
   logStoreLog2((char*)"\n\n\ntest2 ----- ", pLogStore);
 
   if (gAssert) {
@@ -228,7 +229,8 @@ void test4() {
   assert(pLogStore);
   pSyncNode->pLogStore = pLogStore;
   logStoreLog2((char*)"\n\n\ntest4 ----- ", pLogStore);
-  pLogStore->syncLogSetBeginIndex(pLogStore, 5);
+  //pLogStore->syncLogSetBeginIndex(pLogStore, 5);
+  pLogStore->syncLogRestoreFromSnapshot(pLogStore, 4);
 
   for (int i = 5; i <= 9; ++i) {
     int32_t         dataLen = 10;
@@ -289,7 +291,8 @@ void test5() {
   assert(pLogStore);
   pSyncNode->pLogStore = pLogStore;
   logStoreLog2((char*)"\n\n\ntest5 ----- ", pLogStore);
-  pLogStore->syncLogSetBeginIndex(pLogStore, 5);
+  //pLogStore->syncLogSetBeginIndex(pLogStore, 5);
+  pLogStore->syncLogRestoreFromSnapshot(pLogStore, 4);
 
   for (int i = 5; i <= 9; ++i) {
     int32_t         dataLen = 10;
@@ -363,7 +366,8 @@ void test6() {
   assert(pLogStore);
   pSyncNode->pLogStore = pLogStore;
   logStoreLog2((char*)"\n\n\ntest6 ----- ", pLogStore);
-  pLogStore->syncLogSetBeginIndex(pLogStore, 5);
+  // pLogStore->syncLogSetBeginIndex(pLogStore, 5);
+  pLogStore->syncLogRestoreFromSnapshot(pLogStore, 4);
 
   for (int i = 5; i <= 9; ++i) {
     int32_t         dataLen = 10;
@@ -405,14 +409,32 @@ void test6() {
     assert(pLogStore->syncLogLastTerm(pLogStore) == 0);
   }
 
+  do {
+    SyncIndex firstVer = walGetFirstVer(pWal);
+    SyncIndex lastVer = walGetLastVer(pWal);
+    bool isEmpty = walIsEmpty(pWal);
+    printf("before -------- firstVer:%ld lastVer:%ld isEmpty:%d \n", firstVer, lastVer, isEmpty);
+  } while (0);
+
   logStoreDestory(pLogStore);
   cleanup();
 
+
+
   // restart
   init();
   pLogStore = logStoreCreate(pSyncNode);
   assert(pLogStore);
   pSyncNode->pLogStore = pLogStore;
+  
+
+  do {
+    SyncIndex firstVer = walGetFirstVer(pWal);
+    SyncIndex lastVer = walGetLastVer(pWal);
+    bool isEmpty = walIsEmpty(pWal);
+    printf("after -------- firstVer:%ld lastVer:%ld isEmpty:%d \n", firstVer, lastVer, isEmpty);
+  } while (0);
+
   logStoreLog2((char*)"\n\n\ntest6 restart ----- ", pLogStore);
 
   if (gAssert) {
@@ -432,17 +454,20 @@ void test6() {
 int main(int argc, char** argv) {
   tsAsyncLog = 0;
   sDebugFlag = DEBUG_TRACE + DEBUG_INFO + DEBUG_SCREEN + DEBUG_FILE;
+  gRaftDetailLog = true;
 
   if (argc == 2) {
     gAssert = atoi(argv[1]);
   }
   sTrace("gAssert : %d", gAssert);
 
+/*
   test1();
   test2();
   test3();
   test4();
   test5();
+*/
   test6();
 
   return 0;
diff --git a/source/libs/sync/test/syncRaftLogTest3.cpp b/source/libs/sync/test/syncRaftLogTest3.cpp
index c81a6d3ca9772f0ff3642062ab1854f1dd36342c..302e29a091277e085dcd67d0e2a55df00108a0b0 100644
--- a/source/libs/sync/test/syncRaftLogTest3.cpp
+++ b/source/libs/sync/test/syncRaftLogTest3.cpp
@@ -312,7 +312,8 @@ void test5() {
   pSyncNode->pLogStore = pLogStore;
   logStoreLog2((char*)"\n\n\ntest5 ----- ", pLogStore);
 
-  pSyncNode->pLogStore->syncLogSetBeginIndex(pSyncNode->pLogStore, 6);
+  //pSyncNode->pLogStore->syncLogSetBeginIndex(pSyncNode->pLogStore, 6);
+  pLogStore->syncLogRestoreFromSnapshot(pSyncNode->pLogStore, 5);
   for (int i = 6; i <= 10; ++i) {
     int32_t         dataLen = 10;
     SSyncRaftEntry* pEntry = syncEntryBuild(dataLen);
@@ -372,6 +373,7 @@ void test5() {
 int main(int argc, char** argv) {
   tsAsyncLog = 0;
   sDebugFlag = DEBUG_TRACE + DEBUG_INFO + DEBUG_SCREEN + DEBUG_FILE;
+  gRaftDetailLog = true;
 
   if (argc == 2) {
     gAssert = atoi(argv[1]);
diff --git a/source/libs/wal/src/walRead.c b/source/libs/wal/src/walRead.c
index 9bed6d230bcd227317075c1894462b1d805d270b..682afbb785784f0e158f95750fc376130a6fd696 100644
--- a/source/libs/wal/src/walRead.c
+++ b/source/libs/wal/src/walRead.c
@@ -272,14 +272,23 @@ int32_t walReadWithHandle(SWalReadHandle *pRead, int64_t ver) {
     }
   }
 
+  if (ver > pRead->pWal->vers.lastVer || ver < pRead->pWal->vers.firstVer) {
+    wError("invalid version: % " PRId64 ", first ver %ld, last ver %ld", ver, pRead->pWal->vers.firstVer,
+           pRead->pWal->vers.lastVer);
+    terrno = TSDB_CODE_WAL_LOG_NOT_EXIST;
+    return -1;
+  }
+
   ASSERT(taosValidFile(pRead->pReadLogTFile) == true);
 
   code = taosReadFile(pRead->pReadLogTFile, pRead->pHead, sizeof(SWalHead));
   if (code != sizeof(SWalHead)) {
     if (code < 0)
       terrno = TAOS_SYSTEM_ERROR(errno);
-    else
+    else {
       terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
+      ASSERT(0);
+    }
     return -1;
   }
 
@@ -304,8 +313,10 @@ int32_t walReadWithHandle(SWalReadHandle *pRead, int64_t ver) {
       pRead->pHead->head.bodyLen) {
     if (code < 0)
       terrno = TAOS_SYSTEM_ERROR(errno);
-    else
+    else {
       terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
+      ASSERT(0);
+    }
     return -1;
   }
 
diff --git a/source/libs/wal/src/walWrite.c b/source/libs/wal/src/walWrite.c
index 031289f93ea8ab58dadd55be7490b4ec4a8caeda..34f83fb8a9aaf93e5b38603ca31377b1c152d5f0 100644
--- a/source/libs/wal/src/walWrite.c
+++ b/source/libs/wal/src/walWrite.c
@@ -150,6 +150,7 @@ int32_t walRollback(SWal *pWal, int64_t ver) {
   ASSERT(code == 0);
   if (code != 0) {
     terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
+    ASSERT(0);
     return -1;
   }
   if (head.head.version != ver) {