[jira] [Updated] (HADOOP-8642) io.native.lib.available only controls zlib

["Akira AJISAKA (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-8642?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Akira AJISAKA updated HADOOP-8642:
----------------------------------

    Attachment: HADOOP-8642.patch

Attaching a patch.
Now NativeCodeLoader always try to load native library in static method.
The patch will check configuration in the method. If io.native.lib.available is false, NativeCodeLoader never try to load native library.

> io.native.lib.available only controls zlib
> ------------------------------------------
>
>                 Key: HADOOP-8642
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8642
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: native
>    Affects Versions: 2.0.0-alpha
>            Reporter: Eli Collins
>            Assignee: Akira AJISAKA
>         Attachments: HADOOP-8642.patch
>
>
> Per core-default.xml {{io.native.lib.available}} indicates "Should native hadoop libraries, if present, be used" however it looks like it only affects zlib. Since we always load the native library this means we may use native libraries even if io.native.lib.available is set to false.
> Let's make the flag to work as advertised - rather than always load the native hadoop library we only attempt to load the library (and report that native is available) if this flag is set. Since io.native.lib.available defaults to true the default behavior should remain unchanged (except that now we wont actually try to load the library if this flag is disabled).



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