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https://issues.apache.org/jira/browse/HADOOP-8611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13438189#comment-13438189
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Robert Parker commented on HADOOP-8611:
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added a new patch for branch 1 to remove mvn references and added curly braces
to if statement
added a new patch for trunk to add curly braces to if statement
> Allow fall-back to the shell-based implementation when JNI-based users-group
> mapping fails
> ------------------------------------------------------------------------------------------
>
> Key: HADOOP-8611
> URL: https://issues.apache.org/jira/browse/HADOOP-8611
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 1.0.3, 0.23.0, 2.0.0-alpha
> Reporter: Kihwal Lee
> Assignee: Robert Parker
> Fix For: 1.1.1, 0.23.3, 3.0.0, 2.2.0-alpha
>
> Attachments: HADOOP-8611-branch1.patch, HADOOP-8611-branch1.patch,
> HADOOP-8611.patch, HADOOP-8611.patch, HADOOP-8611.patch
>
>
> When the JNI-based users-group mapping is enabled, the process/command will
> fail if the native library, libhadoop.so, cannot be found. This mostly
> happens at client-side where users may use hadoop programatically. Instead of
> failing, falling back to the shell-based implementation will be desirable.
> Depending on how cluster is configured, use of the native netgroup mapping
> cannot be subsituted by the shell-based default. For this reason, this
> behavior must be configurable with the default being "disabled".
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