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From "Stephen Chu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7542) Add an option to DFSAdmin -safemode wait to ignore connection failures
Date Wed, 17 Dec 2014 22:06:13 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7542?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Stephen Chu updated HDFS-7542:
------------------------------
    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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