[jira] [Work started] (HADOOP-15988) Should be able to set empty directory flag to TRUE in DynamoDBMetadataStore#innerGet when using authoritative directory listings

["Gabor Bota (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-15988?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HADOOP-15988 started by Gabor Bota.
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> Should be able to set empty directory flag to TRUE in DynamoDBMetadataStore#innerGet when using authoritative directory listings
> --------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-15988
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15988
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.1.0
>            Reporter: Gabor Bota
>            Assignee: Gabor Bota
>            Priority: Major
>
> We have the following comment and implementation in DynamoDBMetadataStore:
> {noformat}
>         // When this class has support for authoritative
>         // (fully-cached) directory listings, we may also be able to answer
>         // TRUE here.  Until then, we don't know if we have full listing or
>         // not, thus the UNKNOWN here:
>         meta.setIsEmptyDirectory(
>             hasChildren ? Tristate.FALSE : Tristate.UNKNOWN);
> {noformat}
> We have authoritative listings now in dynamo since HADOOP-15621, so we should resolve this comment, implement the solution and test it. 



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