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From "Balu Vellanki (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FALCON-2029) HDFS-8828 requires Falcon to update Snapshot based mirroring extension
Date Tue, 13 Sep 2016 22:48:22 GMT

     [ https://issues.apache.org/jira/browse/FALCON-2029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Balu Vellanki updated FALCON-2029:
----------------------------------
    Assignee:     (was: Balu Vellanki)

> HDFS-8828 requires Falcon to update Snapshot based mirroring extension
> ----------------------------------------------------------------------
>
>                 Key: FALCON-2029
>                 URL: https://issues.apache.org/jira/browse/FALCON-2029
>             Project: Falcon
>          Issue Type: Bug
>    Affects Versions: 0.10
>            Reporter: Balu Vellanki
>            Priority: Critical
>
> HDFS-8828 has introduced the following backward incompatible behavior in Hadoop 2.8.0
(as yet unreleased version).  "-delete" option in snapshot based distcp is invalid. Distcp
utilizes the snapshot diff report to build diff copy list, if Falcon provides the "-delete"
option an exception will be thrown unless the method DistCpOptions.validate() is called before
running distcp execute method. 
> Where as in Hadoop 2.7.*, Falcon is required to provide "-delete" option for snapshot
based distcp. 
> HDFS snapshot based mirroring extension provided as part of Falcon 0.10 release (and
trunk) is supposed to work with Hadoop 2.7.1 and above.  To make the code work with both 2.7.*,
2.8.* and future versions, Falcon should call the validate method on distcp options. If the
method does not exist (in 2.7.1), Falcon should catch the exception and proceed with distCp.




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