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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5224) Disable append
Date Fri, 13 Feb 2009 01:51:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12673114#action_12673114

Robert Chansler commented on HADOOP-5224:

This particular item turns off _append()_ at the interface without affecting the implementation
or normal behavior of _sync()_. 
A related item, Hadoop-5225, disables some of the recovery code associated with sync in the
case of data node failure.

The use of either of these facilities in 0.19.0 is dangerous to the integrity of the file
system. The goal is to provide 0.19.1 with the same file system integrity as 0.18.3. Further
development of append and sync recovery can then continue.

> Disable append
> --------------
>                 Key: HADOOP-5224
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5224
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs, libhdfs
>    Affects Versions: 0.19.0
>            Reporter: Nigel Daley
>            Assignee: Raghu Angadi
>            Priority: Blocker
>             Fix For: 0.19.1
> As discussed on core-dev@ (http://www.nabble.com/Hadoop-0.19.1-td21739202.html) we will
disable append API in Hadoop 0.19.1 by throwing UnsupportedOperationException from FileSystem.append(...)
> Does append in libhdfs (HADOOP-4494) need attention too?

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