[MAPREDUCE-3702] internal server error trying access application master via proxy with filter enabled

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.23.0
• Fix Version/s: 0.23.1
• Component/s: mrv2
• Target Version/s: 0.23.1
• Hadoop Flags: Reviewed
• Assignee: Thomas Graves
• Reporter: Thomas Graves
• Created: 20/Jan/12 15:38
• Updated: 05/Mar/12 02:49
• Resolved: 23/Jan/12 21:27

Description

I had a hadoop.http.filter.initializers in place to do user authentication, but was purposely trying to let it bypass authentication on certain pages. One of those was the proxy and the application master main page. When I then tried to go to the application master through the proxy it throws an internal server error:

Problem accessing /mapreduce. Reason:

INTERNAL_SERVER_ERROR
Caused by:

java.lang.NullPointerException
at org.apache.hadoop.yarn.server.webproxy.amfilter.AmIpFilter.doFilter(AmIpFilter.java:100)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:940)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)

It looks like the problem is that AmIpFilter doesn't check for null returned from httpReq.getCookies()