Aggarwal-Raghav commented on PR #6181:
URL: https://github.com/apache/hive/pull/6181#issuecomment-3580525651

   > is that required for Tez-1.0 release?
   
   yes, once we upgrade tez to 1.x in hive, we'll face this issue. As Hive has 
both commons-collection3.x and 4.x, a quick fix can be to update all the 
imports to commons-collections4.x as done in 
https://github.com/apache/hive/pull/5588 
   
   Based on stacktrace, it failing here 
https://github.com/apache/hive/blob/6d2340eb4be333406b8c6ffbb7dc67605e41de15/ql/src/java/org/apache/hadoop/hive/ql/exec/Operator.java#L496
 
   
   But we need commons-collection3.x in tez container classother. My reasoning 
is, if any 3rd party jar like opencsv needs commons-collection3.x , then it 
will fail with same error. Hence shading in hive-exec seems unavoidable.


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