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From "Xiao Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-13774) EC: "hdfs ec -getPolicy" is not retrieving policy details when the special REPLICATION policy set on the directory
Date Thu, 16 Aug 2018 20:28:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16583028#comment-16583028
] 

Xiao Chen commented on HDFS-13774:
----------------------------------

Thanks for reporting the issue and the discussion [~SouryakantaDwivedy] and [~ayushtkn].

I agree this would be confusing to users - we can update the description and documentation
around this.

 

Unfortunately, for compatibility reasons, we cannot change the getPolicy output (e.g. is unspecified).
The message is deliberately printed from [here|https://github.com/apache/hadoop/blob/branch-3.0.0/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/ECAdmin.java#L238-L243] 

> EC: "hdfs ec -getPolicy" is not retrieving policy details when the special REPLICATION
policy set on the directory
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-13774
>                 URL: https://issues.apache.org/jira/browse/HDFS-13774
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: erasure-coding
>    Affects Versions: 3.0.0
>         Environment: 3 Node Linux Cluster
>            Reporter: Souryakanta Dwivedy
>            Assignee: Ayush Saxena
>            Priority: Minor
>         Attachments: GetPolicy_EC.png
>
>
>  Erasure coding: "hdfs ec -getPolicy"" is not retrieving policy details when the special
REPLICATION policy set on the directory
> Steps :-
>  - Create a directory "testEC"
> - Get the EC policy for the directory [Received message as : "The erasure coding policy
of /testEC is unspecified" ]
> - Enable any Erasure coding policy like "XOR-2-1-1024k"
> - Set the EC Policy on the Directory
> - Get the EC policy for the directory [Received message as : "XOR-2-1-1024k" ]
> - Now again set the EC Policy on the directory as "replicate" special REPLICATION policy
> - Get the EC policy for the directory [Received message as : "The erasure coding policy
of /testEC is unspecified" ]
>  The policy is being set for the Directory ,but while retrieving policy details its throwing
error as 
>  policy for the directory is unspecified which is wrong behavior



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