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https://issues.apache.org/jira/browse/HDFS-7542?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephen Chu updated HDFS-7542:
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Attachment: HDFS-7542.001.patch
> Add an option to DFSAdmin -safemode wait to ignore connection failures
> ----------------------------------------------------------------------
>
> Key: HDFS-7542
> URL: https://issues.apache.org/jira/browse/HDFS-7542
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: tools
> Affects Versions: 2.6.0
> Reporter: Stephen Chu
> Assignee: Stephen Chu
> Priority: Minor
> Attachments: HDFS-7542.001.patch
>
>
> Currently, the _dfsadmin -safemode wait_ command aborts when connection to
> the NN fails (network glitch, ConnectException when NN is unreachable,
> EOFException if network link shut down).
> In certain situations, users have asked for an option to make the command
> resilient to connection failures. This is useful so that the admin can
> initiate the wait command despite the NN not being fully up or survive
> intermittent network issues. With this option, the admin can rely on the wait
> command continuing to poll instead of aborting.
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