diff --git a/src/os/inc/osSocket.h b/src/os/inc/osSocket.h
index 7dabd161b4788367c86290c7efbee7aeb3e54e65..63498596113aea603b41cd53fdde03f44d021ce3 100644
--- a/src/os/inc/osSocket.h
+++ b/src/os/inc/osSocket.h
@@ -39,7 +39,7 @@ static FORCE_INLINE int32_t taosCloseSocket(int x) {
     x = ((int32_t)-1);
   }
   if (ret != 0) {
-    exit(10);
+    assert(false);
   }
   return ret;
 }
diff --git a/src/sync/src/syncMain.c b/src/sync/src/syncMain.c
index 565a84f21c6afbea8c06c41da1e35a2bc7845e2a..10cff04494151eb4106bd48edeec4c5e8147a228 100644
--- a/src/sync/src/syncMain.c
+++ b/src/sync/src/syncMain.c
@@ -568,7 +568,7 @@ static void syncClosePeerConn(SSyncPeer *pPeer) {
   taosTmrStopA(&pPeer->timer);
 
   if (taosCloseSocket(pPeer->syncFd) != 0) {
-    exit(4);
+    exit(false);
   }
   if (pPeer->peerFd >= 0) {
     pPeer->peerFd = -1;
@@ -896,7 +896,7 @@ static void syncRestartPeer(SSyncPeer *pPeer) {
   if (pPeer->nodeId == 0 || ret > 0 || (ret == 0 && pPeer->port > tsSyncPort)) {
     sDebug("%s, check peer connection in 1000 ms", pPeer->id);
     if (!taosTmrReset(syncCheckPeerConnection, SYNC_CHECK_INTERVAL, (void *)pPeer->rid, tsSyncTmrCtrl, &pPeer->timer)) {
-      exit(3);
+      assert(false);
     }
   }
 }
diff --git a/src/sync/src/syncTcp.c b/src/sync/src/syncTcp.c
index f69c7e137ac80da5bf5bfaafc180a1927f15737e..8ca5b63ba17ff04cd8c64e0ed1d47b414c83ed5a 100644
--- a/src/sync/src/syncTcp.c
+++ b/src/sync/src/syncTcp.c
@@ -169,7 +169,7 @@ void syncFreeTcpConn(void *param) {
   sDebug("%p TCP connection will be closed, fd:%d", pThread, pConn->fd);
   pConn->closedByApp = 1;
   if (shutdown(pConn->fd, SHUT_WR) != 0) {
-    exit(2);
+    ASSERT(false);
   }
 }