Attila Doroszlai created HDDS-2591:
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Summary: No tailMap needed for startIndex 0 in
ContainerSet#listContainer
Key: HDDS-2591
URL: https://issues.apache.org/jira/browse/HDDS-2591
Project: Hadoop Distributed Data Store
Issue Type: Improvement
Components: Ozone Datanode
Reporter: Attila Doroszlai
Assignee: Attila Doroszlai
{{ContainerSet#listContainer}} has this code:
{code:title=https://github.com/apache/hadoop-ozone/blob/3c334f6a7b344e0e5f52fec95071c369286cfdcb/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/impl/ContainerSet.java#L198}
map = containerMap.tailMap(containerMap.firstKey(), true);
{code}
This is equivalent to:
{code}
map = containerMap;
{code}
since {{tailMap}} is a sub-map with all keys larger than or equal to
({{inclusive=true}}) {{firstKey}}, which is the lowest key in the map. So it
is a sub-map with all keys, ie. the whole map.
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