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https://issues.apache.org/jira/browse/HADOOP-12261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14641065#comment-14641065
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Colin Patrick McCabe commented on HADOOP-12261:
-----------------------------------------------

I don't understand the negativity.  We are not robots blindly following 
guidelines even when they don't make sense.  If nobody is using 32-bit, then 
there seems to be little downside in removing it.  Clearly running unit tests 
on 32-bit is already broken and nobody noticed until now.

> Surefire needs to make sure the JVMs it fires up are 64-bit
> -----------------------------------------------------------
>
>                 Key: HADOOP-12261
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12261
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: test
>    Affects Versions: 2.7.1
>            Reporter: Alan Burlison
>            Assignee: Alan Burlison
>
> hadoop-project/pom.xml sets maven-surefire-plugin.argLine to include 
> -Xmx4096m. Allocating  that amount of memory requires a 64-bit JVM, but on 
> platforms with both 32 and 64-bit JVMs surefire runs the 32 bit version by 
> default and tests fail to start as a result. "-d64" should be added to the 
> command-line arguments to ensure a 64-bit JVM is always used.



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