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https://issues.apache.org/jira/browse/HDFS-4312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13539868#comment-13539868
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Ivan A. Veselovsky commented on HDFS-4312:
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The last test failure seems to be caused by the test flakiness or other reasons
not related to the patch.
> fix test TestSecureNameNode and improve test TestSecureNameNodeWithExternalKdc
> ------------------------------------------------------------------------------
>
> Key: HDFS-4312
> URL: https://issues.apache.org/jira/browse/HDFS-4312
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.0.0
> Reporter: Ivan A. Veselovsky
> Assignee: Ivan A. Veselovsky
> Attachments: HDFS-4312.patch
>
>
> TestSecureNameNode does not work on Java6 without
> "dfs.web.authentication.kerberos.principal" config property set.
> Also the following improved:
> 1) keytab files are checked for existence and readability to provide
> fast-fail on config error.
> 2) added comment to TestSecureNameNode describing the required sys props.
> 3) string literals replaced with config constants.
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