NullPointerException exception while accessing the Application Master UI
------------------------------------------------------------------------
Key: MAPREDUCE-4048
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4048
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 0.23.1
Reporter: Devaraj K
Assignee: Devaraj K
{code:xml}
2012-03-21 10:21:31,838 ERROR [2145015588@qtp-957250718-801]
org.apache.hadoop.yarn.webapp.Dispatcher: error handling URI:
/mapreduce/attempts/job_1332261815858_2_8/m/KILLED
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor50.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.yarn.webapp.Dispatcher.service(Dispatcher.java:150)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at
com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:263)
at
com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:178)
at
com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:91)
at
com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:62)
at
com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:900)
at
com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:834)
.......
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: java.lang.NullPointerException
at com.google.common.base.Joiner.toString(Joiner.java:317)
at com.google.common.base.Joiner.appendTo(Joiner.java:97)
at com.google.common.base.Joiner.appendTo(Joiner.java:127)
at com.google.common.base.Joiner.join(Joiner.java:158)
at com.google.common.base.Joiner.join(Joiner.java:166)
at org.apache.hadoop.yarn.util.StringHelper.join(StringHelper.java:102)
at
org.apache.hadoop.mapreduce.v2.app.webapp.AppController.badRequest(AppController.java:319)
at
org.apache.hadoop.mapreduce.v2.app.webapp.AppController.attempts(AppController.java:286)
... 36 more
{code}
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