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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13684) Snappy may complain Hadoop is built without snappy if libhadoop is not found.
Date Sat, 28 Oct 2017 10:45:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16223406#comment-16223406
] 

Steve Loughran commented on HADOOP-13684:
-----------------------------------------

Before doing that, is it possible to have the setup: no native libhadoop, but snappy native
code around and accessible. If so, it should be bypassing the native lib check; it just needs
some other check

> Snappy may complain Hadoop is built without snappy if libhadoop is not found.
> -----------------------------------------------------------------------------
>
>                 Key: HADOOP-13684
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13684
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Wei-Chiu Chuang
>            Assignee: Wei-Chiu Chuang
>            Priority: Minor
>              Labels: supportability
>             Fix For: 2.8.0, 3.0.0-alpha2
>
>         Attachments: HADOOP-13684.001.patch, HADOOP-13684.002.patch
>
>
> If for some reason libhadoop can not be found/loaded, Snappy complains Hadoop is not
built with Snappy but it actually is.
> {code:title=SnappyCodec.java}
> public static void checkNativeCodeLoaded() {
>       if (!NativeCodeLoader.isNativeCodeLoaded() ||
>           !NativeCodeLoader.buildSupportsSnappy()) {
>         throw new RuntimeException("native snappy library not available: " +
>             "this version of libhadoop was built without " +
>             "snappy support.");
>       }
> {code}
> This case may happen with MAPREDUCE-6577.



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