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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15183) S3Guard store becomes inconsistent after partial failure of rename
Date Fri, 19 Jan 2018 17:34:01 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16332584#comment-16332584

Steve Loughran commented on HADOOP-15183:

Attached: debug level log of operations leading to failure. Search for "Renaming readonly
files" to get the directory rename sequence which is failing. One of the files being renamed
"readonlyChild" was unsuccessfully renamed earlier and then destDir/readonlyChild deleted

> S3Guard store becomes inconsistent after partial failure of rename
> ------------------------------------------------------------------
>                 Key: HADOOP-15183
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15183
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.0.0
>            Reporter: Steve Loughran
>            Priority: Major
>         Attachments: org.apache.hadoop.fs.s3a.auth.ITestAssumeRole-output.txt
> If an S3A rename() operation fails partway through, such as when the user doesn't have
permissions to delete the source files after copying to the destination, then the s3guard
view of the world ends up inconsistent. In particular the sequence
>  (assuming src/file* is a list of files file1...file10 and read only to caller)
> # create file dest/file1
> # delete file dest/file1
> # rename src/file* dest/ 
> You will not see file1 in the listing, because it will have a tombstone marker and the
update at the end of the rename() didn't take place: the old data is still there.

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