[MAPREDUCE-3948] proxy throws UnknownHostException when following link shortly after job submission

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 0.23.2, 2.0.0-alpha
• Component/s: resourcemanager, webapps
• Assignee: Unassigned
• Reporter: Todd Lipcon
• Created: 01/Mar/12 01:20
• Updated: 10/Mar/15 04:33

Description

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.