diff --git a/src/sync/src/syncRestore.c b/src/sync/src/syncRestore.c
index 466c39060ab9b3639540d56dccc439880db21093..69da1d71fa6329187ab6f1ed7f490786e4763cbe 100644
--- a/src/sync/src/syncRestore.c
+++ b/src/sync/src/syncRestore.c
@@ -65,7 +65,10 @@ static int32_t syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion) {
   while (1) {
     // read file info
     int32_t ret = taosReadMsg(pPeer->syncFd, &(minfo), sizeof(minfo));
-    if (ret < 0) break;
+    if (ret < 0) {
+      sError("%s, failed to read file info while restore file since %s", pPeer->id, strerror(errno));
+      break;
+    }
 
     // if no more file from master, break;
     if (minfo.name[0] == 0 || minfo.magic == 0) {
@@ -92,8 +95,11 @@ static int32_t syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion) {
     fileAck.sync = (sinfo.magic != minfo.magic || sinfo.name[0] == 0) ? 1 : 0;
 
     // send file ack
-    ret = taosWriteMsg(pPeer->syncFd, &(fileAck), sizeof(fileAck));
-    if (ret < 0) break;
+    ret = taosWriteMsg(pPeer->syncFd, &fileAck, sizeof(fileAck));
+    if (ret < 0) {
+      sError("%s, failed to write file:%s ack while restore file since %s", pPeer->id, minfo.name, strerror(errno));
+      break;
+    }
 
     // if sync is not required, continue
     if (fileAck.sync == 0) {
@@ -108,14 +114,17 @@ static int32_t syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion) {
 
     int32_t dfd = open(name, O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU | S_IRWXG | S_IRWXO);
     if (dfd < 0) {
-      sError("%s, failed to open file:%s", pPeer->id, name);
+      sError("%s, failed to open file:%s while restore file since %s", pPeer->id, minfo.name, strerror(errno));
       break;
     }
 
     ret = taosCopyFds(pPeer->syncFd, dfd, minfo.size);
     fsync(dfd);
     close(dfd);
-    if (ret < 0) break;
+    if (ret < 0) {
+      sError("%s, failed to copy file:%s while restore file since %s", pPeer->id, minfo.name, strerror(errno));
+      break;
+    }
 
     fileChanged = true;
     sDebug("%s, %s is received, size:%" PRId64, pPeer->id, minfo.name, minfo.size);
@@ -125,6 +134,7 @@ static int32_t syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion) {
     // data file is changed, code shall be set to 1
     *fversion = minfo.fversion;
     code = 1;
+    sDebug("%s, file changed while restore file", pPeer->id);
   }
 
   if (code < 0) {
@@ -146,15 +156,22 @@ static int32_t syncRestoreWal(SSyncPeer *pPeer) {
 
   while (1) {
     ret = taosReadMsg(pPeer->syncFd, pHead, sizeof(SWalHead));
-    if (ret < 0) break;
+    if (ret < 0) {
+      sError("%s, failed to read walhead while restore wal since %s", pPeer->id, strerror(errno));
+      break;
+    }
 
     if (pHead->len == 0) {
+      sDebug("%s, wal is synced over", pPeer->id);
       code = 0;
       break;
     }  // wal sync over
 
     ret = taosReadMsg(pPeer->syncFd, pHead->cont, pHead->len);
-    if (ret < 0) break;
+    if (ret < 0) {
+      sError("%s, failed to read walcont, len:%d while restore wal since %s", pPeer->id, pHead->len, strerror(errno));
+      break;
+    }
 
     sTrace("%s, restore a record, qtype:wal len:%d hver:%" PRIu64, pPeer->id, pHead->len, pHead->version);
 
diff --git a/src/sync/src/syncRetrieve.c b/src/sync/src/syncRetrieve.c
index 04d4ce32cb5c4b42aac7a89311c575abda07bc02..58d09d080ecca141cdc55ae8b0fac1e791f6725a 100644
--- a/src/sync/src/syncRetrieve.c
+++ b/src/sync/src/syncRetrieve.c
@@ -114,7 +114,10 @@ static int32_t syncRetrieveFile(SSyncPeer *pPeer) {
 
     // send the file info
     int32_t ret = taosWriteMsg(pPeer->syncFd, &(fileInfo), sizeof(fileInfo));
-    if (ret < 0) break;
+    if (ret < 0) {
+      sError("%s, failed to write file:%s info while retrieve file since %s", pPeer->id, fileInfo.name, strerror(errno));
+      break;
+    }
 
     // if no file anymore, break
     if (fileInfo.magic == 0 || fileInfo.name[0] == 0) {
@@ -124,8 +127,11 @@ static int32_t syncRetrieveFile(SSyncPeer *pPeer) {
     }
 
     // wait for the ack from peer
-    ret = taosReadMsg(pPeer->syncFd, &(fileAck), sizeof(fileAck));
-    if (ret < 0) break;
+    ret = taosReadMsg(pPeer->syncFd, &fileAck, sizeof(fileAck));
+    if (ret < 0) {
+      sError("%s, failed to read file:%s ack while retrieve file since %s", pPeer->id, fileInfo.name, strerror(errno));
+      break;
+    }
 
     // set the peer sync version
     pPeer->sversion = fileInfo.fversion;
@@ -134,7 +140,10 @@ static int32_t syncRetrieveFile(SSyncPeer *pPeer) {
     snprintf(name, sizeof(name), "%s/%s", pNode->path, fileInfo.name);
 
     // add the file into watch list
-    if (syncAddIntoWatchList(pPeer, name) < 0) break;
+    if (syncAddIntoWatchList(pPeer, name) < 0) {
+      sError("%s, failed to watch file:%s while retrieve file since %s", pPeer->id, fileInfo.name, strerror(errno));
+      break;
+    }
 
     // if sync is not required, continue
     if (fileAck.sync == 0) {
@@ -145,21 +154,30 @@ static int32_t syncRetrieveFile(SSyncPeer *pPeer) {
 
     // send the file to peer
     int32_t sfd = open(name, O_RDONLY);
-    if (sfd < 0) break;
+    if (sfd < 0) {
+      sError("%s, failed to open file:%s while retrieve file since %s", pPeer->id, fileInfo.name, strerror(errno));
+      break;
+    }
 
     ret = taosSendFile(pPeer->syncFd, sfd, NULL, fileInfo.size);
     close(sfd);
-    if (ret < 0) break;
+    if (ret < 0) {
+      sError("%s, failed to send file:%s while retrieve file since %s", pPeer->id, fileInfo.name, strerror(errno));
+      break;
+    }
 
     sDebug("%s, %s is sent, size:%" PRId64, pPeer->id, name, fileInfo.size);
     fileInfo.index++;
 
     // check if processed files are modified
-    if (syncAreFilesModified(pPeer) != 0) break;
+    if (syncAreFilesModified(pPeer) != 0) {
+      sInfo("%s, file:%s are modified while retrieve file since %s", pPeer->id, fileInfo.name, strerror(errno));
+      break;
+    }
   }
 
   if (code < 0) {
-    sError("%s, failed to retrieve file since %s", pPeer->id, strerror(errno));
+    sError("%s, failed to retrieve file", pPeer->id);
   }
 
   return code;