xinyiZzz commented on code in PR #8994:
URL: https://github.com/apache/incubator-doris/pull/8994#discussion_r851163533


##########
be/src/vec/exec/vexchange_node.cpp:
##########
@@ -73,6 +73,8 @@ Status VExchangeNode::open(RuntimeState* state) {
         
RETURN_IF_ERROR(_stream_recvr->create_merger(_vsort_exec_exprs.lhs_ordering_expr_ctxs(),
                                                      _is_asc_order, 
_nulls_first,
                                                      state->batch_size(), 
_limit, _offset));
+    } else {
+        ADD_THREAD_LOCAL_MEM_TRACKER(_stream_recvr->mem_tracker());

Review Comment:
   Thx for your fix,
   Is the crash in the first line of `thread_mem_tracker_mgr.h::add_tracker` 
`DCHECK(_mem_trackers.find(mem_tracker->id()) == _mem_trackers.end());`?
   
   I'm working on a complete fix for this, and this DCHECK may be commented out 
shortly.



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