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https://issues.apache.org/jira/browse/HADOOP-1570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arun C Murthy updated HADOOP-1570:
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Status: Patch Available (was: Open)
> Add a per-job configuration knob to control loading of native hadoop
> libraries
> -------------------------------------------------------------------------------
>
> Key: HADOOP-1570
> URL: https://issues.apache.org/jira/browse/HADOOP-1570
> Project: Hadoop
> Issue Type: New Feature
> Components: io
> Affects Versions: 0.13.0, 0.12.3
> Reporter: Arun C Murthy
> Assignee: Arun C Murthy
> Fix For: 0.14.0
>
> Attachments: HADOOP-1570_1_20070709.patch
>
>
> As it exists today, native-hadoop libraries are loaded automatically if
> libhadoop.so is present; however we have sporadically seen issues
> (HADOOP-1545) since native direct-buffers aren't very well understood. The
> only way to switch off usage of these is to remove the native libraries which
> is a maintenence issue for large clusters...
> Hence I propose we add a per-job config knob: {{hadoop.native.lib}} (set to
> {{true}} by default) which can be used to control usage of native libraries
> even when the libraries are present e.g. we can have hadoop installed with
> native libraries present and then use this knob to switch off their usage in
> rare cases we see issues with them; thus aiding maintenence.
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