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https://issues.apache.org/jira/browse/HADOOP-9657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14633449#comment-14633449
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Steve Loughran commented on HADOOP-9657:
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Looks OK, though we should have a separate "UnsetDestinationAddress" wiki entry
which describes the problem, the normal one being "your client is using a
general server-side config which hasn't set the hostname or port in actual use
by the service"
> NetUtils.wrapException to have special handling for 0.0.0.0 addresses and :0
> ports
> ----------------------------------------------------------------------------------
>
> Key: HADOOP-9657
> URL: https://issues.apache.org/jira/browse/HADOOP-9657
> Project: Hadoop Common
> Issue Type: Improvement
> Components: net
> Affects Versions: 2.7.0
> Reporter: Steve Loughran
> Assignee: Varun Saxena
> Priority: Minor
> Attachments: HADOOP-9657.01.patch
>
>
> when an exception is wrapped, it may look like {{0.0.0.0:0 failed on
> connection exception: java.net.ConnectException: Connection refused; For more
> details see: http://wiki.apache.org/hadoop/ConnectionRefused}}
> We should recognise all zero ip addresses and 0 ports and flag them as "your
> configuration of the endpoint is wrong", as it is clearly the case
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