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https://issues.apache.org/jira/browse/HDDS-16216?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Huang Kuan Hao reassigned HDDS-16216:
-------------------------------------
Assignee: Chenchen Lai (was: Huang Kuan Hao)
> Avoid the flatten-copy in KeyInputStream.getBlockLocationInfo
> -------------------------------------------------------------
>
> Key: HDDS-16216
> URL: https://issues.apache.org/jira/browse/HDDS-16216
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Huang Kuan Hao
> Assignee: Chenchen Lai
> Priority: Major
>
> getBlockLocationInfo allocates a flattened list on the per-block read /
> pipeline-refresh path just to find one block by ID:
> List<OmKeyLocationInfo> collect =
> newKeyInfo.getLatestVersionLocations()
> .getLocationList()
> .stream()
> .filter(l -> l.getBlockID().equals(blockID))
> .collect(Collectors.toList());
> if (CollectionUtils.isNotEmpty(collect)) {
> return collect.get(0);
> } else {
> return null;
> }
> Fix: iterate getLocationLists() and return on the first blockID match
> (short-circuits, no copy). Do not use getBlocksLatestVersionOnly() — the
> block may live in a non-latest createVersion bucket, so narrowing the search
> would change behavior. Behavior unchanged.
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