Zhe Zhang created HDFS-8918:
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Summary: Convert BlockUnderConstructionFeature#replicas form list
to array
Key: HDFS-8918
URL: https://issues.apache.org/jira/browse/HDFS-8918
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Affects Versions: 2.8.0
Reporter: Zhe Zhang
Assignee: Zhe Zhang
{{BlockInfoUnderConstruction}} / {{BlockUnderConstructionFeature}} uses a List
to store its {{replicas}}. To reduce memory usage, we can use an array instead.
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