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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4295) Using port 1023 should be valid when starting Secure DataNode
Date Mon, 10 Dec 2012 22:45:22 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13528388#comment-13528388
] 

Todd Lipcon commented on HDFS-4295:
-----------------------------------

+1, lgtm. Thanks Stephen.
                
> Using port 1023 should be valid when starting Secure DataNode
> -------------------------------------------------------------
>
>                 Key: HDFS-4295
>                 URL: https://issues.apache.org/jira/browse/HDFS-4295
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.0.0-alpha
>            Reporter: Stephen Chu
>            Assignee: Stephen Chu
>              Labels: trivial
>         Attachments: HDFS-4295.patch
>
>
> In SecureDataNodeStarter:
> {code}
> if ((ss.getLocalPort() >= 1023 || listener.getPort() >= 1023) &&
>         UserGroupInformation.isSecurityEnabled()) {
>       throw new RuntimeException("Cannot start secure datanode with unprivileged ports");
> }
> {code}
> This prohibits using port 1023, but this should be okay because only root can listen
to ports below 1024.
> We can change the >= to >.

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