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From "Robert Joseph Evans (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3948) proxy throws UnknownHostException when following link shortly after job submission
Date Tue, 06 Mar 2012 16:38:57 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13223391#comment-13223391
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Robert Joseph Evans commented on MAPREDUCE-3948:
------------------------------------------------

It looks like MAPREDUCE-3687 fixed this issue, but the error message returned by the 404 from
it may not be ideal for this case.  Perhaps we should just change the error message returned
to be more generic.
                
> proxy throws UnknownHostException when following link shortly after job submission
> ----------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3948
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3948
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: resourcemanager, webapps
>    Affects Versions: 0.24.0, 0.23.2
>            Reporter: Todd Lipcon
>            Priority: Minor
>
> I submitted a job and then clicked on the link from the console quickly, before the job
began to run. I saw the following exception:
> java.net.UnknownHostException: N
> ...
>         at org.apache.hadoop.yarn.server.webproxy.WebAppProxyServlet.proxyLink(WebAppProxyServlet.java:148)
>         at org.apache.hadoop.yarn.server.webproxy.WebAppProxyServlet.doGet(WebAppProxyServlet.java:269)
> Assumedly this is because the URL is stored as "N/A" instead of a true null value.

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