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https://issues.apache.org/jira/browse/HADOOP-8756?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colin Patrick McCabe updated HADOOP-8756:
-----------------------------------------

     Target Version/s: 2.2.0-alpha
    Affects Version/s: 2.2.0-alpha
    
> libsnappy loader issues
> -----------------------
>
>                 Key: HADOOP-8756
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8756
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: native
>    Affects Versions: 2.2.0-alpha
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>            Priority: Minor
>
> * We use {{System.loadLibrary("snappy")}} from the Java side.  However in 
> libhadoop, we use {{dlopen}} to open libsnappy.so dynamically.  It seems like 
> the System.loadLibrary nonsense is completely redundant-- we would only need 
> this if we planned on accessing libsnappy methods directly from Java (via the 
> 'native' keyword)- - which we don't, and can't, since snappy is not JNI.  At 
> the end of the day, snappy is only accessible through libhadoop.so, so I 
> think snappy-related issues should be handled there.
> * We should log the search path(s) we use for {{libsnappy.so}}, so that it's 
> easier to diagnose configuration issues.
> * It seems like the static initialization code in the LoadSnappy.java class 
> references the static initialization code in NativeCodeLoader.  Basically, if 
> the init method in NativeCodeLoader doesn't run before the init method in 
> LoadSnappy, there could be problems.  We should avoid having this kind of 
> issue.

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