diff --git a/tracker/tracker_global.c b/tracker/tracker_global.c
index c5e1349..d68d169 100644
--- a/tracker/tracker_global.c
+++ b/tracker/tracker_global.c
@@ -60,5 +60,3 @@ bool g_http_servers_dirty = false;
 #if defined(DEBUG_FLAG) && defined(OS_LINUX)
 char g_exe_name[256] = {0};
 #endif
-
-FDFSConnectionStat g_connection_stat = {0, 0};
diff --git a/tracker/tracker_global.h b/tracker/tracker_global.h
index f3d0504..d464402 100644
--- a/tracker/tracker_global.h
+++ b/tracker/tracker_global.h
@@ -86,8 +86,6 @@ extern bool g_http_servers_dirty;
 extern char g_exe_name[256];
 #endif
 
-extern FDFSConnectionStat g_connection_stat;
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/tracker/tracker_service.c b/tracker/tracker_service.c
index 8b91179..e3e00a6 100644
--- a/tracker/tracker_service.c
+++ b/tracker/tracker_service.c
@@ -94,7 +94,7 @@ int tracker_service_init()
     }
 
     result = sf_service_init("fdfs_trackerd", NULL, NULL,
-            sock_accept_done_callback, fdfs_set_body_length,
+            sock_accept_done_callback, fdfs_set_body_length, NULL,
             tracker_deal_task, task_finish_clean_up, NULL, 1000,
             sizeof(TrackerHeader), sizeof(TrackerClientInfo));
     sf_enable_thread_notify(false);
diff --git a/tracker/tracker_types.h b/tracker/tracker_types.h
index b92002f..7a820dd 100644
--- a/tracker/tracker_types.h
+++ b/tracker/tracker_types.h
@@ -471,10 +471,5 @@ typedef struct {
 	bool if_leader;       //if leader
 } TrackerRunningStatus;
 
-typedef struct fdfs_connection_stat {
-    volatile int current_count;
-    int max_count;
-} FDFSConnectionStat;
-
 #endif