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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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