[jira] [Updated] (SPARK-33739) Jobs committed through the S3A Magic committer don't report the bytes written

["Steve Loughran (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-33739?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran updated SPARK-33739:
-----------------------------------
    Summary: Jobs committed through the S3A Magic committer don't report the bytes written  (was: Magic committer files don't have the count of bytes written collected by spark)

> Jobs committed through the S3A Magic committer don't report the bytes written
> -----------------------------------------------------------------------------
>
>                 Key: SPARK-33739
>                 URL: https://issues.apache.org/jira/browse/SPARK-33739
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.0.1
>            Reporter: Steve Loughran
>            Priority: Minor
>
> The spark statistics tracking doesn't correctly assess the size of the uploaded files as it only calls getFileStatus on the zero byte objects -not the yet-to-manifest files. Which, given they don't exist yet, isn't easy to do.
> HADOOP-17414 will attach the final length as a custom header to the marker object, and implement getXAttr in the S3A FS to probe for it.
> BasicWriteStatsTracker can probe for this custom Xattr if the size of the generated file is 0 bytes; if found and parseable use that as the declared length of the output.



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