diff --git a/runtime/v2/binary.go b/runtime/v2/binary.go
index 49ecd80e9..51845bfee 100644
--- a/runtime/v2/binary.go
+++ b/runtime/v2/binary.go
@@ -98,6 +98,9 @@ func (b *binary) Start(ctx context.Context, opts *types.Any, onClose func()) (_
 	go func() {
 		defer f.Close()
 		_, err := io.Copy(os.Stderr, f)
+		// To prevent flood of error messages, the expected error
+		// should be reset, like os.ErrClosed or os.ErrNotExist, which
+		// depends on platform.
 		err = checkCopyShimLogError(ctx, err)
 		if err != nil {
 			log.G(ctx).WithError(err).Error("copy shim log")
diff --git a/runtime/v2/shim.go b/runtime/v2/shim.go
index a8c614634..893926c18 100644
--- a/runtime/v2/shim.go
+++ b/runtime/v2/shim.go
@@ -97,6 +97,9 @@ func loadShim(ctx context.Context, bundle *Bundle, events *exchange.Exchange, rt
 	go func() {
 		defer f.Close()
 		_, err := io.Copy(os.Stderr, f)
+		// To prevent flood of error messages, the expected error
+		// should be reset, like os.ErrClosed or os.ErrNotExist, which
+		// depends on platform.
 		err = checkCopyShimLogError(ctx, err)
 		if err != nil {
 			log.G(ctx).WithError(err).Error("copy shim log after reload")