diff --git a/src/dnode/src/dnodeVRead.c b/src/dnode/src/dnodeVRead.c
index fd3fea6a8d3b3bf2d2fd4996812bcf509cfa4ca8..ea738661ce2813e13468ad91b4dc1d54775db21f 100644
--- a/src/dnode/src/dnodeVRead.c
+++ b/src/dnode/src/dnodeVRead.c
@@ -65,7 +65,7 @@ void dnodeDispatchToVReadQueue(SRpcMsg *pMsg) {
     assert(pHead->contLen > 0);
     void *pVnode = vnodeAcquire(pHead->vgId);
     if (pVnode != NULL) {
-      int32_t code = vnodeWriteToRQueue(pVnode, pCont, pHead->contLen, TAOS_QTYPE_RPC, pMsg);
+      code = vnodeWriteToRQueue(pVnode, pCont, pHead->contLen, TAOS_QTYPE_RPC, pMsg);
       if (code == TSDB_CODE_SUCCESS) queuedMsgNum++;
       vnodeRelease(pVnode);
     }
diff --git a/src/mnode/src/mnodeVgroup.c b/src/mnode/src/mnodeVgroup.c
index eec559600fa5ec4b4bd9a4bcb7d2335a2a10b720..68cf0d064070c5bbcf287d90ed7ab7de236d1dfb 100644
--- a/src/mnode/src/mnodeVgroup.c
+++ b/src/mnode/src/mnodeVgroup.c
@@ -656,7 +656,7 @@ static int32_t mnodeGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *p
 
   pShow->bytes[cols] = 4;
   pSchema[cols].type = TSDB_DATA_TYPE_INT;
-  strcpy(pSchema[cols].name, "onlineVnodes");
+  strcpy(pSchema[cols].name, "onlines");
   pSchema[cols].bytes = htons(pShow->bytes[cols]);
   cols++;
 
@@ -671,13 +671,13 @@ static int32_t mnodeGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *p
   for (int32_t i = 0; i < pShow->maxReplica; ++i) {
     pShow->bytes[cols] = 2;
     pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
-    snprintf(pSchema[cols].name, TSDB_COL_NAME_LEN, "v%dDnode", i + 1);
+    snprintf(pSchema[cols].name, TSDB_COL_NAME_LEN, "v%d_dnode", i + 1);
     pSchema[cols].bytes = htons(pShow->bytes[cols]);
     cols++;
 
     pShow->bytes[cols] = 9 + VARSTR_HEADER_SIZE;
     pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
-    snprintf(pSchema[cols].name, TSDB_COL_NAME_LEN, "v%dStatus", i + 1);
+    snprintf(pSchema[cols].name, TSDB_COL_NAME_LEN, "v%d_status", i + 1);
     pSchema[cols].bytes = htons(pShow->bytes[cols]);
     cols++;
   }
diff --git a/src/sync/src/syncMain.c b/src/sync/src/syncMain.c
index ac79b486061c191506e527e031e93069759abbb0..de8acdbec183e18596bb6dc6a63fc8b1b94616f8 100644
--- a/src/sync/src/syncMain.c
+++ b/src/sync/src/syncMain.c
@@ -560,6 +560,9 @@ static void syncChooseMaster(SSyncNode *pNode) {
         index = i;
       }
     }
+    sDebug("vgId:%d, master:%s may be choosed, index:%d", pNode->vgId, pNode->peerInfo[index]->id, index);
+  } else {
+    sDebug("vgId:%d, no master election since onlineNum:%d replica:%d", pNode->vgId, onlineNum, pNode->replica);
   }
 
   // add arbitrator connection
@@ -580,6 +583,11 @@ static void syncChooseMaster(SSyncNode *pNode) {
         }
       }
     }
+
+    if (index >= 0) {
+      sDebug("vgId:%d, master:%s may be choosed, index:%d onlineNum(arb):%d replica:%d", pNode->vgId,
+             pNode->peerInfo[index]->id, index, onlineNum, replica);
+    }
   }
 
   if (index >= 0) {
@@ -678,7 +686,7 @@ static void syncCheckRole(SSyncPeer *pPeer, SPeerStatus* peersStatus, int8_t new
   if (pMaster) {
     // master is there
     pNode->pMaster = pMaster;
-    sDebug("%s, it is the master, sver:%" PRIu64, pMaster->id, pMaster->version);
+    sDebug("%s, it is the master, replica:^%d sver:%" PRIu64, pMaster->id, pNode->replica, pMaster->version);
 
     if (syncValidateMaster(pPeer) < 0) return;
 
@@ -711,10 +719,10 @@ static void syncCheckRole(SSyncPeer *pPeer, SPeerStatus* peersStatus, int8_t new
     }
 
     if (consistent) {
-      sDebug("vgId:%d, choose master", pNode->vgId);
+      sDebug("vgId:%d, choose master, replica:%d", pNode->vgId, pNode->replica);
       syncChooseMaster(pNode);
     } else {
-      sDebug("vgId:%d, cannot choose master since roles inequality", pNode->vgId);
+      sDebug("vgId:%d, cannot choose master since roles inequality, replica:%d", pNode->vgId, pNode->replica);
     }
   }
 
diff --git a/src/util/src/tsocket.c b/src/util/src/tsocket.c
index 2543c8170896825ae2a94349c0218e7d99ce8592..2937124bebb32a2a48d317ec2eae2b2aa08defd3 100644
--- a/src/util/src/tsocket.c
+++ b/src/util/src/tsocket.c
@@ -115,6 +115,10 @@ int32_t taosWriteMsg(SOCKET fd, void *buf, int32_t nbytes) {
       nleft -= nwritten;
       ptr += nwritten;
     }
+
+    if (errno == SIGPIPE || errno == EPIPE) {
+      return -1;
+    }
   }
 
   return (nbytes - nleft);
@@ -142,6 +146,10 @@ int32_t taosReadMsg(SOCKET fd, void *buf, int32_t nbytes) {
       nleft -= nread;
       ptr += nread;
     }
+
+    if (errno == SIGPIPE || errno == EPIPE) {
+      return -1;
+    }
   }
 
   return (nbytes - nleft);