diff --git a/weed/util/bounded_tree/bounded_tree.go b/weed/util/bounded_tree/bounded_tree.go
index efe2ff93a..8c99ad83d 100644
--- a/weed/util/bounded_tree/bounded_tree.go
+++ b/weed/util/bounded_tree/bounded_tree.go
@@ -1,8 +1,6 @@
 package bounded_tree
 
 import (
-	"fmt"
-
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
@@ -135,7 +133,7 @@ func (t *BoundedTree) HasVisited(p util.FullPath) bool {
 	}
 
 	components := p.Split()
-	fmt.Printf("components %v %d\n", components, len(components))
+	// fmt.Printf("components %v %d\n", components, len(components))
 	return t.hasVisited(t.root, util.FullPath("/"), components, 0)
 }
 
@@ -149,7 +147,7 @@ func (t *BoundedTree) hasVisited(n *Node, currentPath util.FullPath, components
 		return false
 	}
 
-	fmt.Printf("  hasVisited child %v %+v %d\n", currentPath, components, i)
+	// fmt.Printf("  hasVisited child %v %+v %d\n", currentPath, components, i)
 
 	if i >= len(components) {
 		return true
diff --git a/weed/util/bounded_tree/bounded_tree_test.go b/weed/util/bounded_tree/bounded_tree_test.go
index 331cc46c0..2328f0497 100644
--- a/weed/util/bounded_tree/bounded_tree_test.go
+++ b/weed/util/bounded_tree/bounded_tree_test.go
@@ -62,6 +62,15 @@ func TestBoundedTree(t *testing.T) {
 	tree.EnsureVisited(util.FullPath("/a/b/c"), visitFn)
 
 	assert.Equal(t, true, tree.HasVisited(util.FullPath("/a/b")))
+	assert.Equal(t, true, tree.HasVisited(util.FullPath("/a/b/c")))
+	assert.Equal(t, false, tree.HasVisited(util.FullPath("/a/b/c/d")))
+	assert.Equal(t, false, tree.HasVisited(util.FullPath("/a/b/e")))
+	assert.Equal(t, false, tree.HasVisited(util.FullPath("/a/f")))
+	assert.Equal(t, false, tree.HasVisited(util.FullPath("/g")))
+	assert.Equal(t, false, tree.HasVisited(util.FullPath("/h")))
+	assert.Equal(t, true, tree.HasVisited(util.FullPath("/")))
+	assert.Equal(t, true, tree.HasVisited(util.FullPath("/x")))
+	assert.Equal(t, false, tree.HasVisited(util.FullPath("/a/b/e/x")))
 
 	printMap(tree.root.Children)