kangkaisen commented on a change in pull request #1610: Add bitmap agg type and 
udaf
URL: https://github.com/apache/incubator-doris/pull/1610#discussion_r315974781
 
 

 ##########
 File path: be/src/exec/olap_scanner.cpp
 ##########
 @@ -328,6 +328,11 @@ Status OlapScanner::get_batch(
                         slot->ptr = reinterpret_cast<char*>(v);
                     }
                 }
+
+                // the memory allocate by _read_row_cursor arena has been 
copied,
+                // so we should release these memory immediately
+                _read_row_cursor.reset_arena();
 
 Review comment:
   OK

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