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https://issues.apache.org/jira/browse/SPARK-32900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tom van Bussel updated SPARK-32900:
-----------------------------------
Description: In order to determine whether
{{UnsafeExternalSorter.SpillableIterator}} has spilled already it checks
whether {{upstream}} is an instance of {{UnsafeInMemorySorter.SortedIterator}}.
When radix sorting is used (added by SPARK-14851) and there are NULLs in the
input however, upstream will be an instance of
{{UnsafeExternalSorter.ChainedIterator}} instead, but should still be spilled.
(was: In order to determine whether {{UnsafeExternalSorter.SpillableIterator}}
has spilled already it checks whether {{upstream}} is an instance of
{{UnsafeInMemorySorter.SortedIterator}}. When radix sorting is used and there
are NULLs in the input however, upstream will be an instance of
{{UnsafeExternalSorter.ChainedIterator}} instead, but should still be spilled.)
> UnsafeExternalSorter.SpillableIterator cannot spill when there are NULLs in
> the input and radix sorting is used.
> ----------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-32900
> URL: https://issues.apache.org/jira/browse/SPARK-32900
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.4.7, 3.0.1
> Reporter: Tom van Bussel
> Priority: Major
>
> In order to determine whether {{UnsafeExternalSorter.SpillableIterator}} has
> spilled already it checks whether {{upstream}} is an instance of
> {{UnsafeInMemorySorter.SortedIterator}}. When radix sorting is used (added by
> SPARK-14851) and there are NULLs in the input however, upstream will be an
> instance of {{UnsafeExternalSorter.ChainedIterator}} instead, but should
> still be spilled.
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