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https://issues.apache.org/jira/browse/HADOOP-12081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14581202#comment-14581202
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Gabor Liptak commented on HADOOP-12081:
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Based on
http://stackoverflow.com/a/2269242/304690
the getOSLoginModuleName() in
https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java
might not be correctly detecting 32-bit Java installed on Windows x64
> 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
>
> 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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