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https://issues.apache.org/jira/browse/MAPREDUCE-3890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13217868#comment-13217868
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Vinod Kumar Vavilapalli commented on MAPREDUCE-3890:
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Not a problem, either of this or MAPREDUCE-3922 could have gone in, but I
preferred that one as someone validated that patch. Hope to see more
contributions from you!
bq. Do we still default to a 32-bit build? Or do we now default to native, but
allow someone to override with the new flag?
The later. The summary is that, by default, the build will compile to the
native arch. Can be overridden by the flag.
> Change to nodemanager build now requires 32-bit libraries
> ---------------------------------------------------------
>
> Key: MAPREDUCE-3890
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3890
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: build, mrv2
> Affects Versions: 0.23.1
> Environment: Centos 6, x86_64
> Reporter: Ralph H Castain
> Assignee: Ralph H Castain
> Fix For: 0.23.2
>
> Attachments: MAPREDUCE-3890.patch.txt
>
>
> Sometime during the last week, someone committed a change to:
> hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/pom.xml
> that inserted a -m32 in:
> <configureEnvironment>
> <property>
> <name>CFLAGS</name>
> <value>-DHADOOP_CONF_DIR=${container-executor.conf.dir}
> -m32</value>
> This breaks the build on 64-bit systems that do not have 32-bit libraries
> installed. The change was actually not required as 64-bit support for JNI and
> JVMs is readily available and installed by default on many 64-bit systems.
> Removing the flag results in a completed and functional build.
> If mandating 32-bit builds is desired, then a better solution would be to
> provide a configure flag such as -DHADOOP_32bit_MODE, perhaps with a
> corresponding flag for 64-bit. Regardless, locking the system to 32-bit
> builds seems a tad extreme.
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