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From "Souryakanta Dwivedy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-13785) EC: "removePolicy" is not working for built-in/system Erasure Code policies
Date Tue, 07 Aug 2018 13:40:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16571664#comment-16571664
] 

Souryakanta Dwivedy commented on HDFS-13785:
--------------------------------------------

Thanks for the patch [~ayushtkn].As [~xiaochen] sugggested in comments you can update
the patch for usage info of EC "addPolicies" also.

> EC: "removePolicy" is not working for built-in/system Erasure Code policies
> ---------------------------------------------------------------------------
>
>                 Key: HDFS-13785
>                 URL: https://issues.apache.org/jira/browse/HDFS-13785
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: documentation, erasure-coding
>    Affects Versions: 3.0.0
>         Environment: 3 Node SUSE Linux Cluster
>            Reporter: Souryakanta Dwivedy
>            Assignee: Ayush Saxena
>            Priority: Minor
>         Attachments: HDFS-13785-01.patch
>
>
> EC: "removePolicy" is not working for built-in/system Erasure Code policies
> - Check the existing built-in EC policies with command "hdfs ec -listPolicies"
> - try to remove any of the EC policies,it will throw error message as "RemoteException:
System erasure coding policy RS-3-2-1024k cannot be removed"
> - add user-defined EC policies 
> - Try to remove any user-defined policy,it will be removed successfully
> - But in help option it is specified as :
>  vm1:/opt/client/install/hadoop/namenode/bin> ./hdfs ec -help removePolicy
> [-removePolicy -policy <policy>]
> Remove an erasure coding policy.
> <policy> The name of the erasure coding policy
> vm1:/opt/client/install/hadoop/namenode/bin>
> Actual result :-
>  hdfs ec -removePolicy not working for built-in/system EC policies ,where as usage description

>  provided as "Remove an erasure coding policy".throwing exception as : "RemoteException:
System erasure coding policy RS-3-2-1024k cannot be removed"
> Expected output : Either EC "removePolicy" option should be applicable for all type of
EC policies 
>  Or it has to be specified in usage that EC "removePolicy" will be applicable to remove
>  only user-defined EC policies, not applicable for system EC coding policies.



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