diff --git a/be/src/exec/json_scanner.cpp b/be/src/exec/json_scanner.cpp
index df9c80e0cb..3e7363bdff 100644
--- a/be/src/exec/json_scanner.cpp
+++ b/be/src/exec/json_scanner.cpp
@@ -354,7 +354,8 @@ Status JsonReader::_parse_json_doc(size_t* size, bool* eof) {
     }
 
     // clear memory here.
-    _origin_json_doc.GetAllocator().Clear();
+    _value_allocator.Clear();
+    _parse_allocator.Clear();
     bool has_parse_error = false;
     // parse jsondata to JsonDoc