diff --git a/HISTORY b/HISTORY
index 254fb97..c5973dd 100644
--- a/HISTORY
+++ b/HISTORY
@@ -7,6 +7,7 @@ Version 5.10  2017-03-29
  * do NOT sync storage server info to tracker leader
  * adjust parameter store_server when use_trunk_file is true
  * clear sync src id when tracker response ENOENT
+ * log more info when fdfs_recv_header / fdfs_recv_response fail
 
 Version 5.09  2016-12-29
  * bug fixed: list_all_groups expand buffer auto for so many groups
diff --git a/client/storage_client.c b/client/storage_client.c
index c665d52..4b53b63 100644
--- a/client/storage_client.c
+++ b/client/storage_client.c
@@ -266,6 +266,9 @@ int storage_get_metadata(ConnectionInfo *pTrackerServer, \
 	if ((result=fdfs_recv_response(pStorageServer, \
 		&file_buff, 0, &in_bytes)) != 0)
 	{
+		logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		break;
 	}
 
@@ -364,6 +367,9 @@ int storage_query_file_info_ex(ConnectionInfo *pTrackerServer, \
 	if ((result=fdfs_recv_response(pStorageServer, \
 		&pInBuff, sizeof(in_buff), &in_bytes)) != 0)
 	{
+		logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		break;
 	}
 
@@ -490,6 +496,9 @@ int storage_delete_file(ConnectionInfo *pTrackerServer, \
 	if ((result=fdfs_recv_response(pStorageServer, \
 		&pBuff, 0, &in_bytes)) != 0)
 	{
+		logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		break;
 	}
 
@@ -584,6 +593,9 @@ int storage_do_download_file_ex(ConnectionInfo *pTrackerServer, \
 		if ((result=fdfs_recv_header(pStorageServer, \
 			&in_bytes)) != 0)
 		{
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_header fail, result: %d",
+                    __LINE__, result);
 			break;
 		}
 
@@ -601,6 +613,9 @@ int storage_do_download_file_ex(ConnectionInfo *pTrackerServer, \
 		if ((result=fdfs_recv_response(pStorageServer, \
 			file_buff, 0, &in_bytes)) != 0)
 		{
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
 			break;
 		}
 	}
@@ -614,6 +629,9 @@ int storage_do_download_file_ex(ConnectionInfo *pTrackerServer, \
 		if ((result=fdfs_recv_header(pStorageServer, \
 			&in_bytes)) != 0)
 		{
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_header fail, result: %d",
+                    __LINE__, result);
 			break;
 		}
 
@@ -973,6 +991,9 @@ int storage_do_upload_file(ConnectionInfo *pTrackerServer, \
 	if ((result=fdfs_recv_response(pStorageServer, \
 		&pInBuff, sizeof(in_buff), &in_bytes)) != 0)
 	{
+		logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		break;
 	}
 
@@ -1229,6 +1250,12 @@ int storage_set_metadata(ConnectionInfo *pTrackerServer, \
 	pBuff = in_buff;
 	result = fdfs_recv_response(pStorageServer, \
 		&pBuff, 0, &in_bytes);
+    if (result != 0)
+    {
+		logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
+    }
 	} while (0);
 
 	if (meta_buff != NULL)
@@ -1426,6 +1453,9 @@ int storage_client_create_link(ConnectionInfo *pTrackerServer, \
 	if ((result=fdfs_recv_response(pStorageServer, \
 		&pInBuff, sizeof(in_buff), &in_bytes)) != 0)
 	{
+		logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		break;
 	}
 
@@ -1750,6 +1780,9 @@ int storage_do_append_file(ConnectionInfo *pTrackerServer, \
 
 	if ((result=fdfs_recv_header(pStorageServer, &in_bytes)) != 0)
 	{
+        logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_header fail, result: %d",
+                __LINE__, result);
 		break;
 	}
 
@@ -1878,6 +1911,9 @@ int storage_do_modify_file(ConnectionInfo *pTrackerServer, \
 
 	if ((result=fdfs_recv_header(pStorageServer, &in_bytes)) != 0)
 	{
+        logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_header fail, result: %d",
+                __LINE__, result);
 		break;
 	}
 
@@ -2290,6 +2326,9 @@ int storage_truncate_file(ConnectionInfo *pTrackerServer, \
 
 	if ((result=fdfs_recv_header(pStorageServer, &in_bytes)) != 0)
 	{
+        logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_header fail, result: %d",
+                __LINE__, result);
 		break;
 	}
 
diff --git a/client/tracker_client.c b/client/tracker_client.c
index c40a8d4..79ac122 100644
--- a/client/tracker_client.c
+++ b/client/tracker_client.c
@@ -317,6 +317,12 @@ int tracker_list_servers(ConnectionInfo *pTrackerServer, \
 		pInBuff = (char *)stats;
 		result = fdfs_recv_response(conn, &pInBuff, \
 					sizeof(stats), &in_bytes);
+        if (result != 0)
+        {
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+        }
 	}
 
 	if (new_connection)
@@ -514,6 +520,12 @@ int tracker_list_one_group(ConnectionInfo *pTrackerServer, \
 		pInBuff = (char *)&src;
 		result = fdfs_recv_response(conn, \
 			&pInBuff, sizeof(TrackerGroupStat), &in_bytes);
+        if (result != 0)
+        {
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+        }
 	}
 
 	if (new_connection)
@@ -588,6 +600,12 @@ int tracker_list_groups(ConnectionInfo *pTrackerServer, \
 		pInBuff = (char *)stats;
 		result = fdfs_recv_response(conn, \
 			&pInBuff, sizeof(stats), &in_bytes);
+        if (result != 0)
+        {
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+        }
 	}
 
 	if (new_connection)
@@ -699,6 +717,12 @@ int tracker_do_query_storage(ConnectionInfo *pTrackerServer, \
 		pInBuff = in_buff;
 		result = fdfs_recv_response(conn, \
 			&pInBuff, sizeof(in_buff), &in_bytes);
+        if (result != 0)
+        {
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+        }
 	}
 
 	if (new_connection)
@@ -777,6 +801,12 @@ int tracker_query_storage_list(ConnectionInfo *pTrackerServer, \
 		pInBuff = in_buff;
 		result = fdfs_recv_response(conn, \
 				&pInBuff, sizeof(in_buff), &in_bytes);
+        if (result != 0)
+        {
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+        }
 	}
 
 	if (new_connection)
@@ -870,6 +900,12 @@ int tracker_query_storage_store_without_group(ConnectionInfo *pTrackerServer,
 		pInBuff = in_buff;
 		result = fdfs_recv_response(conn, \
 				&pInBuff, sizeof(in_buff), &in_bytes);
+        if (result != 0)
+        {
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+        }
 	}
 
 	if (new_connection)
@@ -947,6 +983,12 @@ int tracker_query_storage_store_with_group(ConnectionInfo *pTrackerServer, \
 		pInBuff = in_buff;
 		result = fdfs_recv_response(conn, \
 				&pInBuff, sizeof(in_buff), &in_bytes);
+        if (result != 0)
+        {
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+        }
 	}
 
 	if (new_connection)
@@ -1036,6 +1078,12 @@ int tracker_query_storage_store_list_with_group( \
 		pInBuff = in_buff;
 		result = fdfs_recv_response(conn, \
 				&pInBuff, sizeof(in_buff), &in_bytes);
+        if (result != 0)
+        {
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+        }
 	}
 
 	if (new_connection)
@@ -1198,7 +1246,13 @@ int tracker_delete_storage(TrackerServerGroup *pTrackerGroup, \
 		{
 			pInBuff = in_buff;
 			result = fdfs_recv_response(conn, &pInBuff, 0, &in_bytes);
-		}
+            if (result != 0)
+            {
+                logError("file: "__FILE__", line: %d, "
+                        "fdfs_recv_response fail, result: %d",
+                        __LINE__, result);
+            }
+        }
 
 		tracker_disconnect_server_ex(conn, result != 0 && result != ENOENT);
 		if (result != 0)
@@ -1275,6 +1329,9 @@ int tracker_delete_group(TrackerServerGroup *pTrackerGroup, \
 		tracker_disconnect_server_ex(conn, result != 0 && result != ENOENT);
 		if (result != 0)
 		{
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
             break;
 		}
 	}
@@ -1370,6 +1427,9 @@ int tracker_set_trunk_server(TrackerServerGroup *pTrackerGroup, \
 		}
 		else
 		{
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
 			return result;
 		}
 	}
@@ -1430,6 +1490,12 @@ int tracker_get_storage_status(ConnectionInfo *pTrackerServer, \
 		pInBuff = (char *)pDestBuff;
 		result = fdfs_recv_response(conn, \
 			&pInBuff, sizeof(FDFSStorageBrief), &in_bytes);
+		if (result != 0)
+		{
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+		}
 	}
 
 	if (new_connection)
@@ -1511,6 +1577,12 @@ int tracker_get_storage_id(ConnectionInfo *pTrackerServer, \
 	{
 		result = fdfs_recv_response(conn, \
 			&storage_id, FDFS_STORAGE_ID_MAX_SIZE, &in_bytes);
+		if (result != 0)
+		{
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+		}
 	}
 
 	if (new_connection)
diff --git a/storage/storage_func.c b/storage/storage_func.c
index b430508..03e2054 100644
--- a/storage/storage_func.c
+++ b/storage/storage_func.c
@@ -153,6 +153,9 @@ static int storage_do_get_group_name(ConnectionInfo *pTrackerServer)
 	if ((result=fdfs_recv_response(pTrackerServer, \
 		&pInBuff, FDFS_GROUP_NAME_MAX_LEN, &in_bytes)) != 0)
 	{
+		logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		return result;
 	}
 
diff --git a/storage/storage_ip_changed_dealer.c b/storage/storage_ip_changed_dealer.c
index 5b07282..4c6dee5 100644
--- a/storage/storage_ip_changed_dealer.c
+++ b/storage/storage_ip_changed_dealer.c
@@ -97,6 +97,12 @@ static int storage_report_ip_changed(ConnectionInfo *pTrackerServer)
 
 	if (result == 0 || result == EALREADY || result == ENOENT)
 	{
+        if (result != 0)
+        {
+            logWarning("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+        }
 		return 0;
 	}
 	else
diff --git a/storage/storage_sync.c b/storage/storage_sync.c
index 918ee7d..90c0fa6 100644
--- a/storage/storage_sync.c
+++ b/storage/storage_sync.c
@@ -249,6 +249,9 @@ static int storage_sync_copy_file(ConnectionInfo *pStorageServer, \
 		if ((result=fdfs_recv_response(pStorageServer, \
 			&pBuff, 0, &in_bytes)) != 0)
 		{
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
 			break;
 		}
 	} while (0);
@@ -442,6 +445,9 @@ static int storage_sync_modify_file(ConnectionInfo *pStorageServer, \
 		if ((result=fdfs_recv_response(pStorageServer, \
 			&pBuff, 0, &in_bytes)) != 0)
 		{
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
 			break;
 		}
 	} while (0);
@@ -590,6 +596,9 @@ static int storage_sync_truncate_file(ConnectionInfo *pStorageServer, \
 		if ((result=fdfs_recv_response(pStorageServer, \
 			&pBuff, 0, &in_bytes)) != 0)
 		{
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
 			break;
 		}
 	} while (0);
@@ -658,10 +667,19 @@ static int storage_sync_delete_file(ConnectionInfo *pStorageServer, \
 
 	pBuff = in_buff;
 	result = fdfs_recv_response(pStorageServer, &pBuff, 0, &in_bytes);
-	if (result == ENOENT)
-	{
-		result = 0;
-	}
+    if (result != 0)
+    {
+        if (result == ENOENT)
+        {
+            result = 0;
+        }
+        else
+        {
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+        }
+    }
 	
 	return result;
 }
@@ -698,7 +716,14 @@ static int storage_report_my_server_id(ConnectionInfo *pStorageServer)
 	}
 
 	pBuff = in_buff;
-	return fdfs_recv_response(pStorageServer, &pBuff, 0, &in_bytes);
+	result = fdfs_recv_response(pStorageServer, &pBuff, 0, &in_bytes);
+    if (result != 0)
+    {
+        logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
+    }
+    return result;
 }
 
 /**
@@ -917,10 +942,19 @@ static int storage_sync_link_file(ConnectionInfo *pStorageServer, \
 
 	pBuff = in_buff;
 	result = fdfs_recv_response(pStorageServer, &pBuff, 0, &in_bytes);
-	if (result == ENOENT)
-	{
-		result = 0;
-	}
+    if (result != 0)
+    {
+        if (result == ENOENT)
+        {
+            result = 0;
+        }
+        else
+        {
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_recv_response fail, result: %d",
+                    __LINE__, result);
+        }
+    }
 	
 	return result;
 }
diff --git a/storage/tracker_client_thread.c b/storage/tracker_client_thread.c
index 0f87576..c3ff030 100644
--- a/storage/tracker_client_thread.c
+++ b/storage/tracker_client_thread.c
@@ -1102,6 +1102,31 @@ static void set_tracker_leader(const int leader_index)
 	g_tracker_group.leader_index = leader_index;
 }
 
+static void get_tracker_leader()
+{
+    int i;
+    TrackerRunningStatus tracker_status;
+    ConnectionInfo tracker_server;
+
+    for (i=0; i<g_tracker_group.server_count; i++)
+    {
+        memcpy(&tracker_server, g_tracker_group.servers + i,
+                sizeof(ConnectionInfo));
+        if (fdfs_get_tracker_status(&tracker_server, &tracker_status) == 0)
+        {
+            if (tracker_status.if_leader)
+            {
+                g_tracker_group.leader_index = i;
+                logInfo("file: "__FILE__", line: %d, "
+                        "the tracker server leader is #%d. %s:%d",
+                        __LINE__, i, tracker_server.ip_addr,
+                        tracker_server.port);
+                break;
+            }
+        }
+    }
+}
+
 static int tracker_check_response(ConnectionInfo *pTrackerServer, \
 	bool *bServerPortChanged)
 {
@@ -1822,6 +1847,11 @@ static int tracker_sync_notify(ConnectionInfo *pTrackerServer, const int tracker
     {
         if (result == ENOENT)
         {
+            if (g_tracker_group.leader_index == -1)
+            {
+                get_tracker_leader();
+            }
+
             if (tracker_index == g_tracker_group.leader_index)
             {
                 logWarning("file: "__FILE__", line: %d, "
@@ -1830,10 +1860,9 @@ static int tracker_sync_notify(ConnectionInfo *pTrackerServer, const int tracker
                         __LINE__, g_sync_src_id);
                 *g_sync_src_id = '\0';
                 storage_write_to_sync_ini_file();
-                result = 0;
             }
         }
-        if (result != 0)
+        if (result != 0 && result != ENOENT)
         {
             logError("file: "__FILE__", line: %d, "
                     "fdfs_recv_header fail, result: %d",
@@ -1852,7 +1881,7 @@ static int tracker_sync_notify(ConnectionInfo *pTrackerServer, const int tracker
 		return EINVAL;
 	}
 
-	return 0;
+    return result;
 }
 
 int tracker_report_join(ConnectionInfo *pTrackerServer, \
@@ -1911,8 +1940,12 @@ int tracker_report_join(ConnectionInfo *pTrackerServer, \
 		{
 			for (i=0; i<g_tracker_group.server_count; i++)
 			{
-				if (my_report_status[i] != EFAULT)
+				if (my_report_status[i] == -1)
 				{
+                    logInfo("file: "__FILE__", line: %d, "
+                            "tracker server: #%d. %s:%d, my_report_status: %d",
+                            __LINE__, i, g_tracker_group.servers[i].ip_addr,
+                            g_tracker_group.servers[i].port, my_report_status[i]);
 					break;
 				}
 			}
diff --git a/storage/trunk_mgr/trunk_client.c b/storage/trunk_mgr/trunk_client.c
index 9ac959c..9e7d514 100644
--- a/storage/trunk_mgr/trunk_client.c
+++ b/storage/trunk_mgr/trunk_client.c
@@ -66,6 +66,9 @@ static int trunk_client_trunk_do_alloc_space(ConnectionInfo *pTrunkServer, \
 	if ((result=fdfs_recv_response(pTrunkServer, \
 		&p, sizeof(FDFSTrunkInfoBuff), &in_bytes)) != 0)
 	{
+		logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		return result;
 	}
 
@@ -176,6 +179,9 @@ static int trunk_client_trunk_confirm_or_free(ConnectionInfo *pTrunkServer,\
 
 	if ((result=fdfs_recv_header(pTrunkServer, &in_bytes)) != 0)
 	{
+		logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_header fail, result: %d",
+                __LINE__, result);
 		return result;
 	}
 
diff --git a/storage/trunk_mgr/trunk_sync.c b/storage/trunk_mgr/trunk_sync.c
index c56d604..ee87ad8 100644
--- a/storage/trunk_mgr/trunk_sync.c
+++ b/storage/trunk_mgr/trunk_sync.c
@@ -1381,6 +1381,9 @@ static int trunk_sync_data(TrunkBinLogReader *pReader, \
 	pBuff = in_buff;
 	if ((result=fdfs_recv_response(pStorage, &pBuff, 0, &in_bytes)) != 0)
 	{
+		logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		return result;
 	}
 
@@ -1573,9 +1576,13 @@ static void* trunk_sync_thread_entrance(void* arg)
 
 		if (reader.binlog_offset == 0)
 		{
-			if (fdfs_deal_no_body_cmd(&storage_server, \
-				STORAGE_PROTO_CMD_TRUNK_TRUNCATE_BINLOG_FILE) != 0)
+			if ((result=fdfs_deal_no_body_cmd(&storage_server, \
+				STORAGE_PROTO_CMD_TRUNK_TRUNCATE_BINLOG_FILE)) != 0)
 			{
+                logError("file: "__FILE__", line: %d, "
+                        "fdfs_deal_no_body_cmd fail, result: %d",
+                        __LINE__, result);
+
 				close(storage_server.sock);
 				trunk_reader_destroy(&reader);
 				sleep(5);
diff --git a/tracker/fdfs_shared_func.c b/tracker/fdfs_shared_func.c
index c3260f1..9fc67c1 100644
--- a/tracker/fdfs_shared_func.c
+++ b/tracker/fdfs_shared_func.c
@@ -745,6 +745,12 @@ int fdfs_get_storage_ids_from_tracker_server(ConnectionInfo *pTrackerServer)
 			response = NULL;
 			result = fdfs_recv_response(conn, \
 				&response, 0, &in_bytes);
+            if (result != 0)
+            {
+                logError("file: "__FILE__", line: %d, "
+                        "fdfs_recv_response fail, result: %d",
+                        __LINE__, result);
+            }
 		}
 
 		if (result != 0)
diff --git a/tracker/tracker_mem.c b/tracker/tracker_mem.c
index 1e45185..25f2dd6 100644
--- a/tracker/tracker_mem.c
+++ b/tracker/tracker_mem.c
@@ -3801,6 +3801,9 @@ static int tracker_mem_get_sys_file_piece(ConnectionInfo *pTrackerServer, \
 				sizeof(in_buff), &in_bytes);
 	if (result != 0)
 	{
+        logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		return result;
 	}
 
@@ -4868,6 +4871,9 @@ static int _storage_get_trunk_binlog_size(
 	if ((result=fdfs_recv_response(pStorageServer, \
 		&pInBuff, sizeof(in_buff), &in_bytes)) != 0)
 	{
+        logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		return result;
 	}
 
@@ -5054,6 +5060,9 @@ static int tracker_mem_do_set_trunk_server(FDFSGroupInfo *pGroup,
 			pGroup->storage_port, 
 			STORAGE_PROTO_CMD_TRUNK_DELETE_BINLOG_MARKS)) != 0)
 		{
+            logError("file: "__FILE__", line: %d, "
+                    "fdfs_deal_no_body_cmd_ex fail, result: %d",
+                    __LINE__, result);
 			return result;
 		}
 	}
diff --git a/tracker/tracker_proto.c b/tracker/tracker_proto.c
index d3a6667..685734f 100644
--- a/tracker/tracker_proto.c
+++ b/tracker/tracker_proto.c
@@ -183,6 +183,9 @@ int fdfs_deal_no_body_cmd(ConnectionInfo *pTrackerServer, const int cmd)
 	result = fdfs_recv_header(pTrackerServer, &in_bytes);
 	if (result != 0)
 	{
+		logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_header fail, cmd: %d, result: %d",
+                __LINE__, cmd, result);
 		return result;
 	}
 
diff --git a/tracker/tracker_relationship.c b/tracker/tracker_relationship.c
index 7eb6e88..78ae19f 100644
--- a/tracker/tracker_relationship.c
+++ b/tracker/tracker_relationship.c
@@ -64,6 +64,9 @@ static int fdfs_ping_leader(ConnectionInfo *pTrackerServer)
 	if ((result=fdfs_recv_response(pTrackerServer, &pInBuff, \
 			sizeof(in_buff), &in_bytes)) != 0)
 	{
+        logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		return result;
 	}
 
@@ -282,6 +285,9 @@ static int do_notify_leader_changed(ConnectionInfo *pTrackerServer, \
 				0, &in_bytes);
 	if (result != 0)
 	{
+        logError("file: "__FILE__", line: %d, "
+                "fdfs_recv_response fail, result: %d",
+                __LINE__, result);
 		break;
 	}