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https://issues.apache.org/jira/browse/HDFS-9458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15068871#comment-15068871
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Xiao Chen commented on HDFS-9458:
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Thank you for the review and commit Chris.
> TestBackupNode always binds to port 50070, which can cause bind failures.
> -------------------------------------------------------------------------
>
> Key: HDFS-9458
> URL: https://issues.apache.org/jira/browse/HDFS-9458
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Reporter: Chris Nauroth
> Assignee: Xiao Chen
> Fix For: 2.8.0
>
> Attachments: HDFS-9458.001.patch, HDFS-9458.002.patch
>
>
> {{TestBackupNode}} does not override port settings to use a dynamically
> selected port for the NameNode HTTP server. It uses the default of 50070
> defined in hdfs-default.xml. This should be changed to select a dynamic port
> to avoid bind errors.
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