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https://issues.apache.org/jira/browse/HBASE-19682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16308861#comment-16308861
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Appy commented on HBASE-19682:
------------------------------
Yeah, i was wondering that this might fail some tests because of immutable
aspect of Collections.emptyList(). :-)
> Use Collections.emptyList() For Empty List Values
> -------------------------------------------------
>
> Key: HBASE-19682
> URL: https://issues.apache.org/jira/browse/HBASE-19682
> Project: HBase
> Issue Type: Improvement
> Components: hbase
> Affects Versions: 3.0.0
> Reporter: BELUGA BEHR
> Priority: Minor
> Attachments: HBASE-19682.1.patch, HBASE-19682.2.patch
>
>
> Use {{Collection.emptyList()}} for returning an empty list instead of
> {{return new ArrayList<> ()}}. The default constructor creates a buffer of
> size 10 for _ArrayList_ therefore, returning this static value saves on some
> memory and GC pressure and saves time not having to allocate a new internally
> buffer for each instantiation.
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