Github user ravipesala commented on a diff in the pull request: https://github.com/apache/incubator-carbondata/pull/620#discussion_r106136281 --- Diff: processing/src/main/java/org/apache/carbondata/processing/newflow/steps/SortProcessorStepImpl.java --- @@ -74,7 +81,6 @@ public void initialize() throws IOException { public Iterator<CarbonRowBatch>[] execute() throws CarbonDataLoadingException { final Iterator<CarbonRowBatch>[] iterators = child.execute(); Iterator<CarbonRowBatch>[] sortedIterators = sorter.sort(iterators); - child.close(); --- End diff -- It is removed as part of refactoring of code to support batch sort. Earlier it was needed to get the cardinality of all dimensions. Now there is a new interface `DictionaryCardinalityFinder` has been added to figure out the cardinalities.
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