[jira] [Updated] (HADOOP-14226) S3Guard: ITestDynamoDBMetadataStoreScale is not cleaning up test data

["Mingliang Liu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-14226?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mingliang Liu updated HADOOP-14226:
-----------------------------------
    Attachment: HADOOP-14226-HADOOP-13345.000.patch

> S3Guard: ITestDynamoDBMetadataStoreScale is not cleaning up test data
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-14226
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14226
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: HADOOP-13345
>            Reporter: Mingliang Liu
>            Assignee: Mingliang Liu
>         Attachments: HADOOP-14226-HADOOP-13345.000.patch
>
>
> After running {{ITestDynamoDBMetadataStoreScale}}, the test data is not cleaned up. There is a call to {{clearMetadataStore(ms, count);}} in the finally clause though. The reason is that, the internally called method {{DynamoDBMetadataStore::deleteSubtree()}} is assuming there should be an item for the parent dest path:
> {code}
> parent=/fake-bucket, child=moved-here, is_dir=true
> {code}
> In DynamoDBMetadataStore implementation, we assume that _if a path exists, all its ancestors will also exist in the table_. We need to pre-create dest path to maintain this invariant so that test data can be cleaned up successfully.
> I think there may be other tests with the same problem. Let's identify/address them separately.



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