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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Reopened: (HADOOP-5224) Disable append
Date Sat, 14 Feb 2009 05:39:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5224?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

dhruba borthakur reopened HADOOP-5224:
--------------------------------------


Hi folks, please pardon me for re-opening this issue. I am wondering if there is a better
way to disable "appends" for 0.19.1 We coudld set the config parameter dfs.support.append
to false in hadoop-defaults.xml. This means that a default installation of hadoop will not
support "appends". However, for people that are testing their apps (not in production), it
gives them an easy way to test their apps. There could be big-and-large warning message associated
with the dfs.support.append parameter warning people to the fact that there could be data
corruption if they set that flag to true.

I am re-opening this issue because I am not sure whether this approach was considered. If
it was considered and was shot down, please let me know why and u can close this issue.

> 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
>
>         Attachments: HADOOP-5224.patch
>
>
> 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(...)
methods.
> Does append in libhdfs (HADOOP-4494) need attention too?

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