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From "Harsh J (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-6895) Native Libraries do not load if a different platform signature is returned from org.apache.hadoop.util.PlatformName
Date Wed, 28 Dec 2011 21:59:30 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6895?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Harsh J updated HADOOP-6895:
----------------------------

    Affects Version/s: 0.20.205.0
        Fix Version/s: 0.24.0

Sorry to come in late.

This looks reasonable to me too. Or should we standardize such stuff inside of PlatformName
itself?

In any case, added comments shall help greatly. Lets target this for trunk. Would you be willing
to continue on this Stephen?
                
> Native Libraries do not load if a different platform signature is returned from org.apache.hadoop.util.PlatformName
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-6895
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6895
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: native
>    Affects Versions: 0.20.205.0
>         Environment: SLES 10, IBM Java 6, Hadoop 0.21.0-rc0
>            Reporter: Stephen Watt
>            Priority: Minor
>             Fix For: 0.24.0
>
>         Attachments: HADOOP-6895.patch
>
>   Original Estimate: 0h
>  Remaining Estimate: 0h
>
> bin/hadoop-config.sh has an environment variable called JAVA_PLATFORM which is set to
to the results returned by org.apache.hadoop.util.PlatformName . These results are sometimes
unique to the JRE being used. Although the value returned for 64 Bit Sun/Oracle Java and 64
Bit IBM Java is the same, it is different for the corresponding 32 Bit JREs. 
> The issue is that the value returned is used in creating the path to the native libraries
on disk, i.e ${HADOOP_COMMON_HOME}/lib/native/${JAVA_PLATFORM}
> Since the path on disk is fixed with the Sun JRE value /lib/native/Linux-i386-32 it therefore
fails when it attempts to load the native libraries with the value returned with 32 Bit IBM
Java, /lib/native/Linux-x86-32

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