diff --git a/src/sync/src/syncMain.c b/src/sync/src/syncMain.c
index 2ca77fa404d31b64fecc98521fe6e3697bd39b4f..843de9461fd956f0602a0d0dce9aca7fb219d42f 100644
--- a/src/sync/src/syncMain.c
+++ b/src/sync/src/syncMain.c
@@ -13,8 +13,7 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-//#include <stdint.h>
-//#include <stdbool.h>
+#define _DEFAULT_SOURCE
 #include "os.h"
 #include "hash.h"
 #include "tlog.h"
@@ -392,7 +391,7 @@ void syncConfirmForward(int64_t rid, uint64_t version, int32_t code) {
     int32_t retLen = taosWriteMsg(pPeer->peerFd, msg, msgLen);
 
     if (retLen == msgLen) {
-      sDebug("%s, forward-rsp is sent, code:%x hver:%" PRIu64, pPeer->id, code, version);
+      sTrace("%s, forward-rsp is sent, code:%x hver:%" PRIu64, pPeer->id, code, version);
     } else {
       sDebug("%s, failed to send forward ack, restart", pPeer->id);
       syncRestartConnection(pPeer);
@@ -821,7 +820,7 @@ static void syncProcessSyncRequest(char *msg, SSyncPeer *pPeer) {
   pthread_attr_destroy(&thattr);
 
   if (ret != 0) {
-    sError("%s, failed to create sync thread(%s)", pPeer->id, strerror(errno));
+    sError("%s, failed to create sync thread since %s", pPeer->id, strerror(errno));
     syncDecPeerRef(pPeer);
   } else {
     pPeer->sstatus = TAOS_SYNC_STATUS_START;
@@ -891,7 +890,7 @@ static void syncProcessFwdResponse(char *cont, SSyncPeer *pPeer) {
   SSyncFwds *pSyncFwds = pNode->pSyncFwds;
   SFwdInfo * pFwdInfo;
 
-  sDebug("%s, forward-rsp is received, code:%x hver:%" PRIu64, pPeer->id, pFwdRsp->code, pFwdRsp->version);
+  sTrace("%s, forward-rsp is received, code:%x hver:%" PRIu64, pPeer->id, pFwdRsp->code, pFwdRsp->version);
   SFwdInfo *pFirst = pSyncFwds->fwdInfo + pSyncFwds->first;
 
   if (pFirst->version <= pFwdRsp->version && pSyncFwds->fwds > 0) {
@@ -910,7 +909,7 @@ static void syncProcessForwardFromPeer(char *cont, SSyncPeer *pPeer) {
   SSyncNode *pNode = pPeer->pSyncNode;
   SWalHead * pHead = (SWalHead *)cont;
 
-  sDebug("%s, forward is received, hver:%" PRIu64 ", len:%d", pPeer->id, pHead->version, pHead->len);
+  sTrace("%s, forward is received, hver:%" PRIu64 ", len:%d", pPeer->id, pHead->version, pHead->len);
 
   if (nodeRole == TAOS_SYNC_ROLE_SLAVE) {
     // nodeVersion = pHead->version;
@@ -1106,7 +1105,7 @@ static void syncProcessIncommingConnection(int32_t connFd, uint32_t sourceIp) {
 
   SFirstPkt firstPkt;
   if (taosReadMsg(connFd, &firstPkt, sizeof(firstPkt)) != sizeof(firstPkt)) {
-    sError("failed to read peer first pkt from ip:%s(%s)", ipstr, strerror(errno));
+    sError("failed to read peer first pkt from ip:%s since %s", ipstr, strerror(errno));
     taosCloseSocket(connFd);
     return;
   }
@@ -1160,7 +1159,7 @@ static void syncProcessBrokenLink(void *param) {
   if (taosAcquireRef(tsSyncRefId, pNode->rid) == NULL) return;
   pthread_mutex_lock(&(pNode->mutex));
 
-  sDebug("%s, TCP link is broken(%s)", pPeer->id, strerror(errno));
+  sDebug("%s, TCP link is broken since %s", pPeer->id, strerror(errno));
   pPeer->peerFd = -1;
 
   if (syncDecPeerRef(pPeer) != 0) {
@@ -1191,7 +1190,7 @@ static void syncSaveFwdInfo(SSyncNode *pNode, uint64_t version, void *mhandle) {
   pFwdInfo->time = time;
 
   pSyncFwds->fwds++;
-  sDebug("vgId:%d, fwd info is saved, hver:%" PRIu64 " fwds:%d ", pNode->vgId, version, pSyncFwds->fwds);
+  sTrace("vgId:%d, fwd info is saved, hver:%" PRIu64 " fwds:%d ", pNode->vgId, version, pSyncFwds->fwds);
 }
 
 static void syncRemoveConfirmedFwdInfo(SSyncNode *pNode) {
@@ -1228,7 +1227,7 @@ static void syncProcessFwdAck(SSyncNode *pNode, SFwdInfo *pFwdInfo, int32_t code
   }
 
   if (confirm && pFwdInfo->confirmed == 0) {
-    sDebug("vgId:%d, forward is confirmed, hver:%" PRIu64 " code:%x", pNode->vgId, pFwdInfo->version, pFwdInfo->code);
+    sTrace("vgId:%d, forward is confirmed, hver:%" PRIu64 " code:%x", pNode->vgId, pFwdInfo->version, pFwdInfo->code);
     (*pNode->confirmForward)(pNode->ahandle, pFwdInfo->mhandle, pFwdInfo->code);
     pFwdInfo->confirmed = 1;
   }
@@ -1243,9 +1242,10 @@ static void syncMonitorNodeRole(void *param, void *tmrId) {
     if (index == pNode->selfIndex) continue;
 
     SSyncPeer *pPeer = pNode->peerInfo[index];
-    if (pPeer->role <= TAOS_SYNC_ROLE_UNSYNCED || nodeRole <= TAOS_SYNC_ROLE_UNSYNCED) {
-      syncSendPeersStatusMsgToPeer(pPeer, 1, SYNC_STATUS_CHECK_ROLE, syncGenTranId());
-    }
+    if (pPeer->role > TAOS_SYNC_ROLE_UNSYNCED && nodeRole > TAOS_SYNC_ROLE_UNSYNCED) continue;
+    if (pPeer->sstatus > TAOS_SYNC_STATUS_INIT || nodeSStatus > TAOS_SYNC_STATUS_INIT) continue;
+
+    syncSendPeersStatusMsgToPeer(pPeer, 1, SYNC_STATUS_CHECK_ROLE, syncGenTranId());
   }
 
   pNode->pRoleTimer = taosTmrStart(syncMonitorNodeRole, SYNC_ROLE_TIMER, (void *)pNode->rid, tsSyncTmrCtrl);
@@ -1335,7 +1335,7 @@ static int32_t syncForwardToPeerImpl(SSyncNode *pNode, void *data, void *mhandle
 
     int32_t retLen = write(pPeer->peerFd, pSyncHead, fwdLen);
     if (retLen == fwdLen) {
-      sDebug("%s, forward is sent, hver:%" PRIu64 " contLen:%d", pPeer->id, pWalHead->version, pWalHead->len);
+      sTrace("%s, forward is sent, hver:%" PRIu64 " contLen:%d", pPeer->id, pWalHead->version, pWalHead->len);
     } else {
       sError("%s, failed to forward, hver:%" PRIu64 " retLen:%d", pPeer->id, pWalHead->version, retLen);
       syncRestartConnection(pPeer);
diff --git a/src/sync/src/syncRestore.c b/src/sync/src/syncRestore.c
index e7901e6eb8d59ed3a93e7e680d31f3e42249c7d3..cc2315fb15c6845a763a95928f5e66b13bbbca40 100644
--- a/src/sync/src/syncRestore.c
+++ b/src/sync/src/syncRestore.c
@@ -13,7 +13,9 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define _DEFAULT_SOURCE
 #include "os.h"
+#include "taoserror.h"
 #include "tlog.h"
 #include "tutil.h"
 #include "ttimer.h"
@@ -126,7 +128,7 @@ static int32_t syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion) {
   }
 
   if (code < 0) {
-    sError("%s, failed to restore %s(%s)", pPeer->id, name, strerror(errno));
+    sError("%s, failed to restore %s since %s", pPeer->id, name, strerror(errno));
   }
 
   return code;
@@ -154,7 +156,7 @@ static int32_t syncRestoreWal(SSyncPeer *pPeer) {
     ret = taosReadMsg(pPeer->syncFd, pHead->cont, pHead->len);
     if (ret < 0) break;
 
-    sDebug("%s, restore a record, qtype:wal len:%d hver:%" PRIu64, pPeer->id, pHead->len, pHead->version);
+    sTrace("%s, restore a record, qtype:wal len:%d hver:%" PRIu64, pPeer->id, pHead->len, pHead->version);
 
     if (lastVer == pHead->version) {
       sError("%s, failed to restore record, same hver:%" PRIu64 ", wal sync failed" PRIu64, pPeer->id, lastVer);
@@ -166,7 +168,7 @@ static int32_t syncRestoreWal(SSyncPeer *pPeer) {
   }
 
   if (code < 0) {
-    sError("%s, failed to restore wal(%s)", pPeer->id, strerror(errno));
+    sError("%s, failed to restore wal from syncFd:%d since %s", pPeer->id, pPeer->syncFd, strerror(errno));
   }
 
   free(buffer);
@@ -222,7 +224,7 @@ int32_t syncSaveIntoBuffer(SSyncPeer *pPeer, SWalHead *pHead) {
     memcpy(pRecv->offset, pHead, len);
     pRecv->offset += len;
     pRecv->forwards++;
-    sDebug("%s, fwd is saved into queue, hver:%" PRIu64 " fwds:%d", pPeer->id, pHead->version, pRecv->forwards);
+    sTrace("%s, fwd is saved into queue, hver:%" PRIu64 " fwds:%d", pPeer->id, pHead->version, pRecv->forwards);
   } else {
     sError("%s, buffer size:%d is too small", pPeer->id, pRecv->bufferSize);
     pRecv->code = -1;  // set error code
diff --git a/src/sync/src/syncRetrieve.c b/src/sync/src/syncRetrieve.c
index 03f5a7bd94e1107971a8ec6721cbbe423915d0f4..82f40854e8fc85632274f4566450963c03e40680 100644
--- a/src/sync/src/syncRetrieve.c
+++ b/src/sync/src/syncRetrieve.c
@@ -13,10 +13,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <stdint.h>
-#include <stdbool.h>
+#define _DEFAULT_SOURCE
 #include <sys/inotify.h>
-#include <unistd.h>
 #include "os.h"
 #include "tlog.h"
 #include "tutil.h"
@@ -34,7 +32,7 @@ static int32_t syncAddIntoWatchList(SSyncPeer *pPeer, char *name) {
     pPeer->watchNum = 0;
     pPeer->notifyFd = inotify_init1(IN_NONBLOCK);
     if (pPeer->notifyFd < 0) {
-      sError("%s, failed to init inotify(%s)", pPeer->id, strerror(errno));
+      sError("%s, failed to init inotify since %s", pPeer->id, strerror(errno));
       return -1;
     }
 
@@ -51,14 +49,14 @@ static int32_t syncAddIntoWatchList(SSyncPeer *pPeer, char *name) {
 
   if (*wd >= 0) {
     if (inotify_rm_watch(pPeer->notifyFd, *wd) < 0) {
-      sError("%s, failed to remove wd:%d(%s)", pPeer->id, *wd, strerror(errno));
+      sError("%s, failed to remove wd:%d since %s", pPeer->id, *wd, strerror(errno));
       return -1;
     }
   }
 
   *wd = inotify_add_watch(pPeer->notifyFd, name, IN_MODIFY | IN_DELETE);
   if (*wd == -1) {
-    sError("%s, failed to add %s(%s)", pPeer->id, name, strerror(errno));
+    sError("%s, failed to add %s since %s", pPeer->id, name, strerror(errno));
     return -1;
   } else {
     sDebug("%s, monitor %s, wd:%d watchNum:%d", pPeer->id, name, *wd, pPeer->watchNum);
@@ -75,7 +73,7 @@ static int32_t syncAreFilesModified(SSyncPeer *pPeer) {
   char    buf[2048];
   int32_t len = read(pPeer->notifyFd, buf, sizeof(buf));
   if (len < 0 && errno != EAGAIN) {
-    sError("%s, failed to read notify FD(%s)", pPeer->id, strerror(errno));
+    sError("%s, failed to read notify FD since %s", pPeer->id, strerror(errno));
     return -1;
   }
 
@@ -161,7 +159,7 @@ static int32_t syncRetrieveFile(SSyncPeer *pPeer) {
   }
 
   if (code < 0) {
-    sError("%s, failed to retrieve file(%s)", pPeer->id, strerror(errno));
+    sError("%s, failed to retrieve file since %s", pPeer->id, strerror(errno));
   }
 
   return code;
@@ -201,7 +199,7 @@ static int32_t syncMonitorLastWal(SSyncPeer *pPeer, char *name) {
   taosClose(pPeer->notifyFd);
   pPeer->notifyFd = inotify_init1(IN_NONBLOCK);
   if (pPeer->notifyFd < 0) {
-    sError("%s, failed to init inotify(%s)", pPeer->id, strerror(errno));
+    sError("%s, failed to init inotify since %s", pPeer->id, strerror(errno));
     return -1;
   }
 
@@ -216,7 +214,7 @@ static int32_t syncMonitorLastWal(SSyncPeer *pPeer, char *name) {
 
   *wd = inotify_add_watch(pPeer->notifyFd, name, IN_MODIFY | IN_CLOSE_WRITE);
   if (*wd == -1) {
-    sError("%s, failed to watch last wal(%s)", pPeer->id, strerror(errno));
+    sError("%s, failed to watch last wal since %s", pPeer->id, strerror(errno));
     return -1;
   }
 
@@ -227,7 +225,7 @@ static int32_t syncCheckLastWalChanges(SSyncPeer *pPeer, uint32_t *pEvent) {
   char    buf[2048];
   int32_t len = read(pPeer->notifyFd, buf, sizeof(buf));
   if (len < 0 && errno != EAGAIN) {
-    sError("%s, failed to read notify FD(%s)", pPeer->id, strerror(errno));
+    sError("%s, failed to read notify FD since %s", pPeer->id, strerror(errno));
     return -1;
   }
 
@@ -268,7 +266,7 @@ static int32_t syncRetrieveLastWal(SSyncPeer *pPeer, char *name, uint64_t fversi
       break;
     }
 
-    sDebug("%s, last wal is forwarded, hver:%" PRIu64, pPeer->id, pHead->version);
+    sTrace("%s, last wal is forwarded, hver:%" PRIu64, pPeer->id, pHead->version);
     int32_t ret = taosWriteMsg(pPeer->syncFd, pHead, wsize);
     if (ret != wsize) break;
     pPeer->sversion = pHead->version;
@@ -424,7 +422,7 @@ static int32_t syncRetrieveWal(SSyncPeer *pPeer) {
     memset(&walHead, 0, sizeof(walHead));
     code = taosWriteMsg(pPeer->syncFd, &walHead, sizeof(walHead));
   } else {
-    sError("%s, failed to send wal(%s)", pPeer->id, strerror(errno));
+    sError("%s, failed to send wal since %s", pPeer->id, strerror(errno));
   }
 
   return code;
diff --git a/src/sync/src/tarbitrator.c b/src/sync/src/tarbitrator.c
index b7f819a3cd8f890d3580352322d8313f7cb2828e..4016042de2135f732dfeb2bbc3b0fdc65b1b63f6 100644
--- a/src/sync/src/tarbitrator.c
+++ b/src/sync/src/tarbitrator.c
@@ -115,14 +115,14 @@ static void arbProcessIncommingConnection(int32_t connFd, uint32_t sourceIp) {
 
   SFirstPkt firstPkt;
   if (taosReadMsg(connFd, &firstPkt, sizeof(firstPkt)) != sizeof(firstPkt)) {
-    sError("failed to read peer first pkt from ip:%s(%s)", ipstr, strerror(errno));
+    sError("failed to read peer first pkt from ip:%s since %s", ipstr, strerror(errno));
     taosCloseSocket(connFd);
     return;
   }
 
-  SNodeConn *pNode = (SNodeConn *)calloc(sizeof(SNodeConn), 1);
+  SNodeConn *pNode = calloc(sizeof(SNodeConn), 1);
   if (pNode == NULL) {
-    sError("failed to allocate memory(%s)", strerror(errno));
+    sError("failed to allocate memory since %s", strerror(errno));
     taosCloseSocket(connFd);
     return;
   }
@@ -146,7 +146,7 @@ static void arbProcessIncommingConnection(int32_t connFd, uint32_t sourceIp) {
 static void arbProcessBrokenLink(void *param) {
   SNodeConn *pNode = param;
 
-  sDebug("%s, TCP link is broken(%s), close connection", pNode->id, strerror(errno));
+  sDebug("%s, TCP link is broken since %s, close connection", pNode->id, strerror(errno));
   tfree(pNode);
 }