diff --git a/src/threadpool.c b/src/threadpool.c
index 2cb0d95bd1fe3df0c59176f9352fa86c53fc2861..875556e3f7d94a9ca2d8d2996110812c2aa21b18 100644
--- a/src/threadpool.c
+++ b/src/threadpool.c
@@ -37,7 +37,6 @@
 #include <stdio.h>
 
 #define MAX_THREADPOOL_SIZE 1024
-#define TASK_NUMBER_WARNING 1000
 #define UV_TRACE_NAME "UV_TRACE"
 
 static uv_rwlock_t g_closed_uv_loop_rwlock;
@@ -665,11 +664,6 @@ void uv__work_done(uv_async_t* handle) {
       QUEUE_APPEND(&lfields->wq_sub[i], &wq);
     }
   }
-
-  if (loop->active_reqs.count > TASK_NUMBER_WARNING
-    && uv_check_data_valid((struct uv_loop_data*)(loop->data)) != 0) {
-    UV_LOGW("The number of task is too much, task number is %{public}u", loop->active_reqs.count);
-  }
 #endif
   uv_mutex_unlock(&loop->wq_mutex);
 
diff --git a/src/unix/async.c b/src/unix/async.c
index 32e3e531545af79fe2c1c20b6215131445761f77..91baec6cd2387ac81ea3dcf1e6458c2bd91ad725 100644
--- a/src/unix/async.c
+++ b/src/unix/async.c
@@ -141,6 +141,11 @@ static void uv__async_send(uv_async_t* handle) {
   int r;
   uv_loop_t* loop = handle->loop;
 
+  if (loop == NULL) {
+    UV_LOGE("fatal error! loop is NULL");
+    return;
+  }
+
   buf = "";
   len = 1;
   fd = loop->async_wfd;