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https://issues.apache.org/jira/browse/HADOOP-12081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14600871#comment-14600871
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Adam Roberts commented on HADOOP-12081:
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All, when can we realistically expect to see this into a Hadoop release? The
implications for the zLinux platform are enormous and code that isn't run on
said platform won't be impacted in the slightest (thus having zero impact to
the community but a BIG impact for our Spark on zLinux efforts)
> Support Hadoop on zLinux - fix JAAS authentication issue
> --------------------------------------------------------
>
> Key: HADOOP-12081
> URL: https://issues.apache.org/jira/browse/HADOOP-12081
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 2.6.0
> Environment: zLinux.
> Reporter: Adam Roberts
> Labels: zlinux
> Attachments: HADOOP-12081.001.patch
>
>
> Currently the 64 bit check in security/UserGroupInformation.java uses os.arch
> and checks for "64". s390x is returned on IBM's z platform: s390x is 64 bit.
> Without this change, if we try to use HDFS with Spark, we get a fatal error
> (unable to login as we can't find a login class).
> This address fixes said issue by identifying s390x as a 64 bit platform and
> thus allowing Spark to run on zLinux. A simple fix with very big implications!
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