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https://issues.apache.org/jira/browse/HIVE-16880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16084108#comment-16084108
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Daniel Voros commented on HIVE-16880:
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[~belugabehr] are you sure that using immutable lists won't affect the behavior
in these cases? For example
[here|https://github.com/apache/hive/commit/8f004997025f032242a5b2db4c6baf9256e0ecbd#diff-6b5f3b952d1387946d488fc2d4432ee1R1228]
in the constructor of AggrStats the list will be stored as a field and we
might try to add to it later.
> Remove ArrayList Instantiation For Empty Arrays
> -----------------------------------------------
>
> Key: HIVE-16880
> URL: https://issues.apache.org/jira/browse/HIVE-16880
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Affects Versions: 2.1.1, 3.0.0
> Reporter: BELUGA BEHR
> Assignee: BELUGA BEHR
> Priority: Trivial
> Fix For: 3.0.0
>
> Attachments: HIVE-16880.1.patch, HIVE-16880.2.patch
>
>
> Class {{org.apache.hadoop.hive.metastore.MetaStoreDirectSql}} uses a lot of
> empty arrays in the code. Please replace with a static empty array instead
> of all the instantiation.
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