diff --git a/src/common/inc/tglobal.h b/src/common/inc/tglobal.h
index 4ffc631566f490d06f40a13a6d8978d3a72104a5..ef0713c4152832aca87f2b768ddcf3789b581a71 100644
--- a/src/common/inc/tglobal.h
+++ b/src/common/inc/tglobal.h
@@ -29,6 +29,7 @@ extern uint16_t tsServerPort;
 extern uint16_t tsDnodeShellPort;
 extern uint16_t tsDnodeDnodePort;
 extern uint16_t tsSyncPort;
+extern uint16_t tsArbitratorPort;
 extern int32_t  tsStatusInterval;
 extern int32_t  tsNumOfMnodes;
 extern int32_t  tsEnableVnodeBak;
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index eb6fcde38502d9b0430c815e0629317339d7dc98..795585e5c9220dd209b85731b6278f1acf279aa5 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -37,6 +37,7 @@ uint16_t tsServerPort = 6030;
 uint16_t tsDnodeShellPort = 6030;  // udp[6035-6039] tcp[6035]
 uint16_t tsDnodeDnodePort = 6035;  // udp/tcp
 uint16_t tsSyncPort = 6040;
+uint16_t tsArbitratorPort = 6042;
 int32_t  tsStatusInterval = 1;  // second
 int32_t  tsNumOfMnodes = 3;
 int32_t  tsEnableVnodeBak = 1;
@@ -1331,7 +1332,10 @@ int taosGetFqdnPortFromEp(const char *ep, char *fqdn, uint16_t *port) {
     *port = atoi(temp+1);
   } 
   
-  if (*port == 0) *port = tsServerPort;
+  if (*port == 0) {
+    *port = tsServerPort;
+    return -1;
+  }
 
   return 0; 
 }
diff --git a/src/sync/src/syncMain.c b/src/sync/src/syncMain.c
index eaa073348a90ad4e3bb9469dc0705475aa981ae8..b6babd41eb8d0be6986db3647bde747260ca84af 100644
--- a/src/sync/src/syncMain.c
+++ b/src/sync/src/syncMain.c
@@ -413,9 +413,11 @@ static void syncAddArbitrator(SSyncNode *pNode)
 
   SNodeInfo nodeInfo;
   nodeInfo.nodeId = 0;
-  taosGetFqdnPortFromEp(tsArbitrator, nodeInfo.nodeFqdn, &nodeInfo.nodePort);
-  nodeInfo.nodePort += TSDB_PORT_SYNC;
-  
+  int ret = taosGetFqdnPortFromEp(tsArbitrator, nodeInfo.nodeFqdn, &nodeInfo.nodePort);
+  if (-1 == ret) {
+    nodeInfo.nodePort = tsArbitratorPort;
+  }
+ 
   if (pPeer) {
     if ((strcmp(nodeInfo.nodeFqdn, pPeer->fqdn) == 0) && (nodeInfo.nodePort == pPeer->port)) {
       return;
diff --git a/src/sync/src/tarbitrator.c b/src/sync/src/tarbitrator.c
index 625c0d68386535297ffb1e92e112e1a18d58a48b..4e55cc475f0b48f9786debf75532af16a48db787 100644
--- a/src/sync/src/tarbitrator.c
+++ b/src/sync/src/tarbitrator.c
@@ -40,13 +40,9 @@ typedef struct {
   void *pConn;
 } SNodeConn;
 
-uint16_t tsArbitratorPort = 0;
-
 int main(int argc, char *argv[]) {
   char     arbLogPath[TSDB_FILENAME_LEN + 16] = {0};
 
-  tsArbitratorPort = tsServerPort + TSDB_PORT_ARBITRATOR;
-
   for (int i=1; i<argc; ++i) {
     if (strcmp(argv[i], "-p")==0 && i < argc-1) {
       tsArbitratorPort = atoi(argv[++i]);