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Posted to issues-all@impala.apache.org by "Yongjun Zhang (JIRA)" <ji...@apache.org> on 2018/08/24 23:23:00 UTC
[jira] [Commented] (IMPALA-6442) Misleading file offset reporting
in error messages
[ https://issues.apache.org/jira/browse/IMPALA-6442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16592308#comment-16592308 ]
Yongjun Zhang commented on IMPALA-6442:
---------------------------------------
Thanks for creating this Jira [~zi]. I will be taking a look and just assigned it to me.
> Misleading file offset reporting in error messages
> --------------------------------------------------
>
> Key: IMPALA-6442
> URL: https://issues.apache.org/jira/browse/IMPALA-6442
> Project: IMPALA
> Issue Type: Bug
> Components: Backend
> Affects Versions: Impala 2.11.0
> Reporter: Zoltan Ivanfi
> Assignee: Yongjun Zhang
> Priority: Minor
> Labels: parquet
>
> {{HdfsParquetScanner::ProcessFooter}} has an error message "File $0 has invalid file metadata at file offset $1." However, the value reported as "file offset" is an offset from the _end_ of the file, not from its _beginning_. This is very misleading, since without explicitly stating that the offset is from the end, it is usually understood to be counted from the beginning.
> Additionally, although the function name is clearly about a "footer", two comments explicitly mention processing the "header". This falsely suggests that metadata is at the beginning of the file, when in reality it is at the end.
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