diff --git a/be/src/util/question b/be/src/util/question
deleted file mode 100644
index 24aef982f6..0000000000
--- a/be/src/util/question
+++ /dev/null
@@ -1,3 +0,0 @@
-Regression race of lock
-timeout of condition_variable
-deadlock
diff --git a/be/src/util/thread.cpp b/be/src/util/thread.cpp
index 9bec08a453..c4b5493dd4 100644
--- a/be/src/util/thread.cpp
+++ b/be/src/util/thread.cpp
@@ -1,3 +1,20 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #include "thread.h"
 
 #include <unistd.h>
diff --git a/be/src/util/thread.h b/be/src/util/thread.h
index d9a6cd788b..a7328e4e7f 100644
--- a/be/src/util/thread.h
+++ b/be/src/util/thread.h
@@ -1,3 +1,19 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
 
 #ifndef DORIS_BE_SRC_UTIL_THREAD_H
 #define DORIS_BE_SRC_UTIL_THREAD_H