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From "Haohui Mai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8934) Move ShortCircuitShm to hdfs-client
Date Mon, 24 Aug 2015 21:08:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14710058#comment-14710058
] 

Haohui Mai commented on HDFS-8934:
----------------------------------

bq. Trunk is in a weird state right now, with half the classes moved and half not, and this
work seems to be destabilizing. I think it would have made more sense for HDFS-6200 to have
been done in a branch.

The value of doing this work in trunk might be under-appreciated. Moving the code in trunk
opens up subsequent opportunities to further clean up the code, such as removing excessing
dependency (HDFS-6564), and cleaning up checkstyle errors (HDFS-8620). If the work had been
done in a separate branch, due to the scope of changes the main focus was to keep the branch
in sync, making further clean up difficult, if not impossible.

Given the nature of refactoring and the scope of changes, stability is definitely a concern
and we try to establish some policy up front. The policy is to (1) zero new features in these
patches, (2) separating the further clean ups from the patches that move the code to the {{hadoop-hdfs-client}}
module. The policy should be able to keep the risks of destablization low and to allow issues
quickly to be addressed.

> Move ShortCircuitShm to hdfs-client
> -----------------------------------
>
>                 Key: HDFS-8934
>                 URL: https://issues.apache.org/jira/browse/HDFS-8934
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: build
>            Reporter: Mingliang Liu
>            Assignee: Mingliang Liu
>             Fix For: 2.8.0
>
>         Attachments: HDFS-8934.000.patch, HDFS-8934.001.patch
>
>
> This jira tracks the effort of moving the {{ShortCircuitShm}} class into the hdfs-client
module.



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