Github user zuyu commented on the issue: https://github.com/apache/incubator-quickstep/pull/96 From the initial observation, the reason of some query cases in the following unit tests failed seems that the aggregation state is already invalid before executing `DestroyAggregationStateWorkOrder`. I will take a further dig. ``` 35 - quickstep_queryoptimizer_tests_distributed_executiongenerator_distinct (OTHER_FAULT) 37 - quickstep_queryoptimizer_tests_distributed_executiongenerator_index (OTHER_FAULT) 39 - quickstep_queryoptimizer_tests_distributed_executiongenerator_join (OTHER_FAULT) 40 - quickstep_queryoptimizer_tests_distributed_executiongenerator_select (OTHER_FAULT) 42 - quickstep_queryoptimizer_tests_distributed_executiongenerator_tablegenerator (OTHER_FAULT) ```
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