diff --git a/src/heap-inl.h b/src/heap-inl.h
index 1e2ed60e09417c481f07a51c59d9866baa7ebe81..cbe6a4764c22d82a015e5afd88c2e4f943c2850d 100644
--- a/src/heap-inl.h
+++ b/src/heap-inl.h
@@ -178,12 +178,19 @@ HEAP_EXPORT(void heap_remove(struct heap* heap,
     k -= 1;
   }
 
-  heap->nelts -= 1;
-
   /* Unlink the max node. */
   child = *max;
   *max = NULL;
 
+#ifdef OHOS_USE_DFX
+  if (child == NULL) {
+    UV_LOGF("Child is NULL, this may be due to multi-threaded calls.");
+    return;
+  }
+#endif
+
+  heap->nelts -= 1;
+
   if (child == node) {
     /* We're removing either the max or the last node in the tree. */
     if (child == heap->min) {
diff --git a/src/threadpool.c b/src/threadpool.c
index 4a1ac04ad306b495898ab5dadf11b2691114e979..3aefe7c971e4a17a46d35e964cb649c3bdd0f943 100644
--- a/src/threadpool.c
+++ b/src/threadpool.c
@@ -313,9 +313,13 @@ int is_uv_loop_good_magic(const uv_loop_t* loop) {
 void on_uv_loop_close(uv_loop_t* loop) {
   time_t t1, t2;
   time(&t1);
+  uv_start_trace(UV_TRACE_TAG, "Get Write Lock");
   uv_rwlock_wrlock(&g_closed_uv_loop_rwlock);
+  uv_end_trace(UV_TRACE_TAG);
   loop->magic = ~UV_LOOP_MAGIC;
+  uv_start_trace(UV_TRACE_TAG, "Release Write Lock");
   uv_rwlock_wrunlock(&g_closed_uv_loop_rwlock);
+  uv_end_trace(UV_TRACE_TAG);
   time(&t2);
   UV_LOGI("uv_loop(%{public}zu) closed in %{public}zds", (size_t)loop, (ssize_t)(t2 - t1));
 }
diff --git a/src/unix/signal.c b/src/unix/signal.c
index bc4206e6d864c8eed412d3c50e47438968465bfd..f15355f8a62515b13a3b956a83db953bacaf6e24 100644
--- a/src/unix/signal.c
+++ b/src/unix/signal.c
@@ -103,8 +103,14 @@ static void uv__signal_global_reinit(void) {
   if (uv__make_pipe(uv__signal_lock_pipefd, 0))
     abort();
 
-  if (uv__signal_unlock())
+  if (uv__signal_unlock()) {
+#ifdef OHOS_USE_DFX
+    UV_LOGF("errno is %d, uv__signal_lock_pipefd[1] is %d (%s:%s:%d)", errno, uv__signal_lock_pipefd[1], __FILE__, __func__, __LINE__);
+    return;
+#else
     abort();
+#endif
+  }
 }
 
 
@@ -148,14 +154,26 @@ static void uv__signal_block_and_lock(sigset_t* saved_sigmask) {
   if (pthread_sigmask(SIG_SETMASK, &new_mask, saved_sigmask))
     abort();
 
-  if (uv__signal_lock())
+  if (uv__signal_lock()) {
+#ifdef OHOS_USE_DFX
+    UV_LOGF("errno is %d, uv__signal_lock_pipefd[0] is %d (%s:%s:%d)", errno, uv__signal_lock_pipefd[0], __FILE__, __func__, __LINE__);
+    return;
+#else
     abort();
+#endif
+  }
 }
 
 
 static void uv__signal_unlock_and_unblock(sigset_t* saved_sigmask) {
-  if (uv__signal_unlock())
+  if (uv__signal_unlock()) {
+#ifdef OHOS_USE_DFX
+    UV_LOGF("errno is %d, uv__signal_lock_pipefd[1] is %d (%s:%s:%d)", errno, uv__signal_lock_pipefd[1], __FILE__, __func__, __LINE__);
+    return;
+#else
     abort();
+#endif
+  }
 
   if (pthread_sigmask(SIG_SETMASK, saved_sigmask, NULL))
     abort();
@@ -461,8 +479,14 @@ static void uv__signal_event(uv_loop_t* loop,
     }
 
     /* Other errors really should never happen. */
-    if (r == -1)
+    if (r == -1) {
+#ifdef OHOS_USE_DFX
+      UV_LOGF("errno is %d, uv__signal_lock_pipefd[0] is %d (%s:%s:%d)", errno, uv__signal_lock_pipefd[0], __FILE__, __func__, __LINE__);
+      return;
+#else
       abort();
+#endif
+    }
 
     bytes += r;