diff -Naur grpc-1.41.1/src/core/lib/iomgr/event_engine/resolver.cc third_party_grpc_sxy/src/core/lib/iomgr/event_engine/resolver.cc
--- grpc-1.41.1/src/core/lib/iomgr/event_engine/resolver.cc	2021-10-20 04:14:40.000000000 +0800
+++ third_party_grpc_sxy/src/core/lib/iomgr/event_engine/resolver.cc	2023-04-20 14:24:54.000000000 +0800
@@ -80,12 +80,13 @@
                      grpc_closure* on_done,
                      grpc_resolved_addresses** addresses) {
   auto dns_resolver = grpc_iomgr_event_engine()->GetDNSResolver();
-  if (!dns_resolver.ok()) {
-    grpc_core::ExecCtx::Run(DEBUG_LOCATION, on_done,
-                            absl_status_to_grpc_error(dns_resolver.status()));
+  if (dns_resolver == nullptr) {
+    grpc_core::ExecCtx::Run(
+        DEBUG_LOCATION, on_done,
+        GRPC_ERROR_CREATE_FROM_STATIC_STRING("Failed to get DNS Resolver."));
     return;
   }
-  new DnsRequest(std::move(*dns_resolver), addr, default_port, on_done,
+  new DnsRequest(std::move(dns_resolver), addr, default_port, on_done,
                  addresses);
 }
 
diff -Naur grpc-1.41.1/src/core/lib/iomgr/event_engine/tcp.cc third_party_grpc_sxy/src/core/lib/iomgr/event_engine/tcp.cc
--- grpc-1.41.1/src/core/lib/iomgr/event_engine/tcp.cc	2021-10-20 04:14:40.000000000 +0800
+++ third_party_grpc_sxy/src/core/lib/iomgr/event_engine/tcp.cc	2023-04-20 14:24:54.000000000 +0800
@@ -175,7 +175,7 @@
   EventEngine* event_engine = grpc_iomgr_event_engine();
   absl::StatusOr<std::unique_ptr<EventEngine::Listener>> listener =
       event_engine->CreateListener(
-          [server](std::unique_ptr<EventEngine::Endpoint> ee_endpoint) {
+          [server](std::unique_ptr<EventEngine::Endpoint> ee_endpoint, const SliceAllocator&) {
             grpc_core::ExecCtx exec_ctx;
             GPR_ASSERT((*server)->on_accept_internal != nullptr);
             grpc_event_engine_endpoint* iomgr_endpoint =
@@ -277,16 +277,5 @@
   int fd;
 };
 
-grpc_fd* grpc_fd_create(int /* fd */, const char* /* name */,
-                        bool /* track_err */) {
-  return nullptr;
-}
-
-grpc_endpoint* grpc_tcp_client_create_from_fd(
-    grpc_fd* /* fd */, const grpc_channel_args* /* channel_args */,
-    const char* /* addr_str */, grpc_slice_allocator* slice_allocator) {
-  grpc_slice_allocator_destroy(slice_allocator);
-  return nullptr;
-}
 
 #endif  // GRPC_USE_EVENT_ENGINE
diff -Naur grpc-1.41.1/src/core/lib/iomgr/event_engine/timer.cc third_party_grpc_sxy/src/core/lib/iomgr/event_engine/timer.cc
--- grpc-1.41.1/src/core/lib/iomgr/event_engine/timer.cc	2021-10-20 04:14:40.000000000 +0800
+++ third_party_grpc_sxy/src/core/lib/iomgr/event_engine/timer.cc	2023-04-20 14:24:54.000000000 +0800
@@ -32,7 +32,7 @@
   timer->ee_task_handle = grpc_iomgr_event_engine()->RunAt(
       grpc_core::ToAbslTime(
           grpc_millis_to_timespec(deadline, GPR_CLOCK_REALTIME)),
-      GrpcClosureToCallback(closure, GRPC_ERROR_NONE), {});
+      GrpcClosureToCallback(closure, GRPC_ERROR_NONE));
 }
 
 void timer_cancel(grpc_timer* timer) {