[jira] [Commented] (HDFS-13660) DistCp job fails when new data is appended in the file while the distCp copy job is running

["Hadoop QA (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-13660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16926519#comment-16926519 ] 

Hadoop QA commented on HDFS-13660:
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| (x) *{color:red}-1 overall{color}* |
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| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  0m  7s{color} | {color:red} HDFS-13660 does not apply to trunk. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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| JIRA Issue | HDFS-13660 |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/27830/console |
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> DistCp job fails when new data is appended in the file while the distCp copy job is running
> -------------------------------------------------------------------------------------------
>
>                 Key: HDFS-13660
>                 URL: https://issues.apache.org/jira/browse/HDFS-13660
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: distcp
>            Reporter: Mukund Thakur
>            Assignee: Mukund Thakur
>            Priority: Critical
>         Attachments: distcp_failure_when_file_append.log
>
>
> Steps to reproduce: 
> Suppose distcp MR job is copying the file /tmp/web_returns_merged/data-m-002 and 
> we append some more data to this file using command 
> hadoop fs -appendToFile xaa  /tmp/web_returns_merged/data-m-002
> the job fails with exception 
>  Mismatch in length of source:hdfs://mycluster0/tmp/web_returns_merged/data-m-002 and target.
> Attached the logs.



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