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

["Mukund Thakur (JIRA)" <ji...@apache.org>]

Mukund Thakur created HDFS-13660:
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             Summary: 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
         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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