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https://issues.apache.org/jira/browse/HDFS-10675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15716167#comment-15716167
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Ewan Higgs commented on HDFS-10675:
-----------------------------------
{quote}
The proposal to handle this is to change the return type of the above functions
to Optional<File>. This will lead to changes in a lot of other places but will
make it explicit that the return value can be null. I propose to open a new
JIRA for this.
{quote}
Hi [~virajith]. I think this makes sense as it keeps the patches specific to
the thing they are trying to solve. Would you like to create the ticket under
HDFS-9806?
> Datanode support to read from external stores.
> -----------------------------------------------
>
> Key: HDFS-10675
> URL: https://issues.apache.org/jira/browse/HDFS-10675
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Virajith Jalaparti
> Attachments: HDFS-10675-HDFS-9806.001.patch,
> HDFS-10675-HDFS-9806.002.patch, HDFS-10675-HDFS-9806.003.patch
>
>
> This JIRA introduces a new {{PROVIDED}} {{StorageType}} to represent external
> stores, along with enabling the Datanode to read from such stores using a
> {{ProvidedReplica}} and a {{ProvidedVolume}}.
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