morningman opened a new pull request, #20704:
URL: https://github.com/apache/doris/pull/20704

   ## Proposed changes
   
   When executing routine load job, there may encounter StackOverflowException.
   This is because the expr in column setting list will be analyze for each 
routine load sub task,
   and there is a self-reference bug that may cause endless loop when analyzing 
expr.
   
   The following columns expr list may trigger this bug:
   
   ```
   columns(col1, col2,
   col2=null_or_empty(col2),
   col1=null_or_empty(col2))
   ```
   
   This fix is verified by user, but I can't add regression test for this case, 
because I can't submit a routine load job
   in our regression test, and this bug can only be triggered in routine load.
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at 
[d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you 
chose the solution you did and what alternatives you considered, etc...
   
   


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