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From "Wei-Chiu Chuang (Jira)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-16878) FileUtil.copy() to throw IOException if the source and destination are the same
Date Tue, 01 Jun 2021 08:38:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-16878?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wei-Chiu Chuang updated HADOOP-16878:
-------------------------------------
    Fix Version/s:     (was: 3.3.1)

> FileUtil.copy() to throw IOException if the source and destination are the same
> -------------------------------------------------------------------------------
>
>                 Key: HADOOP-16878
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16878
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 3.3.0
>            Reporter: Gabor Bota
>            Assignee: Gabor Bota
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.4.0
>
>         Attachments: hdfsTest.patch
>
>          Time Spent: 2h 10m
>  Remaining Estimate: 0h
>
> We encountered an error during a test in our QE when the file destination and source
path were the same. This happened during an ADLS test, and there were no meaningful error
messages, so it was hard to find the root cause of the failure.
> The error we saw was that file size has changed during the copy operation. The new file
creation in the destination - which is the same as the source - creates a file and sets the
file length to zero. After this, getting the source file will fail because the sile size changed
during the operation.
> I propose a solution to at least log in error level in the {{FileUtil}} if the source
and destination of the copy operation is the same, so debugging issues like this will be easier
in the future.



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