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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2686) Rip out DistributedUpgrade framework
Date Mon, 20 Aug 2012 19:49:37 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13438126#comment-13438126

Eli Collins commented on HDFS-2686:

- How about removing dfsadmin command since a 2.x dfsadmin command won't run against a build
where distributed upgrade was supported
- Upgradeable.java can be removed (and the comment in UpgradeStatusReport removed)
- Per Nicholas, in DN#recoverBlock "targets"  can be removed and "datanodeids" initialized
with rBlock.getLocations().
- The comment "Switch to manual safe mode if distributed upgrade is required" in FSN can be

Otherwise looks great.
> Rip out DistributedUpgrade framework
> ------------------------------------
>                 Key: HDFS-2686
>                 URL: https://issues.apache.org/jira/browse/HDFS-2686
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node, name-node
>    Affects Versions: 1.0.0, 2.0.0-alpha
>            Reporter: Todd Lipcon
>            Assignee: Suresh Srinivas
>         Attachments: HDFS-2686.patch, HDFS-2686.patch, HDFS-2686.patch, HDFS-2686.patch
> A distributed upgrade framework was introduced long ago in HADOOP-1286 but was only used
twice throughout history, and not since 0.17, where it was considered buggy (see HADOOP-3677).
This is a lot of clutter in our codebase - let's consider removing it?

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