diff --git a/src/context/context.rs b/src/context/context.rs
index 6b5acb555c..3dbfc4d55b 100644
--- a/src/context/context.rs
+++ b/src/context/context.rs
@@ -944,6 +944,9 @@ impl FdTbl {
         let removed_file_opt = fdtbl.get_mut(real_index).and_then(|opt| opt.take());
         if removed_file_opt.is_some() {
             self.active_count -= 1;
+            if index & syscall::UPPER_FDTBL_TAG != 0 {
+                crate::info!("FdTbl::remove_file upper idx={} active={}", real_index, self.active_count);
+            }
         }
 
         removed_file_opt