[jira] [Created] (MAPREDUCE-3674) If invoked with no queueName request param, jobqueue_details.jsp injects a null queue name into schedulers.

["Harsh J (Created) (JIRA)" <ji...@apache.org>]

If invoked with no queueName request param, jobqueue_details.jsp injects a null queue name into schedulers.
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                 Key: MAPREDUCE-3674
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3674
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: jobtracker
    Affects Versions: 1.0.0
            Reporter: Harsh J
            Assignee: Harsh J
            Priority: Critical


When you access /jobqueue_details.jsp manually, instead of via a link, it has queueName set to null internally and this goes for a lookup into the scheduling info maps as well.

As a result, if using FairScheduler, a Pool with String name = null gets created and this brings the scheduler down. I have not tested what happens to the CapacityScheduler, but ideally if no queueName is set in that jsp, it should fall back to 'default'. Otherwise, this brings down the JobTracker completely.

FairScheduler must also add a check to not create a pool with 'null' name.

The following is the strace that ensues:

{code}
ERROR org.mortbay.log: /jobqueue_details.jsp 
java.lang.NullPointerException 
at org.apache.hadoop.mapred.jobqueue_005fdetails_jsp._jspService(jobqueue_005fdetails_jsp.java:71) 
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) 
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) 
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221) 
at org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:829) 
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) 
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399) 
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) 
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) 
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450) 
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) 
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) 
at org.mortbay.jetty.Server.handle(Server.java:326) 
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) 
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928) 
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549) 
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) 
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410) 
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) 
INFO org.apache.hadoop.ipc.Server: IPC Server handler 2 on 9001, call heartbeat from XYZ:MNOP: error: java.io.IOException: java.lang.NullPointerException 
java.io.IOException: java.lang.NullPointerException 
at org.apache.hadoop.mapred.SchedulingAlgorithms$FairShareComparator.compare(SchedulingAlgorithms.java:95) 
at org.apache.hadoop.mapred.SchedulingAlgorithms$FairShareComparator.compare(SchedulingAlgorithms.java:68) 
at java.util.Arrays.mergeSort(Unknown Source) 
at java.util.Arrays.sort(Unknown Source) 
at java.util.Collections.sort(Unknown Source) 
at org.apache.hadoop.mapred.FairScheduler.assignTasks(FairScheduler.java:435) 
at org.apache.hadoop.mapred.JobTracker.heartbeat(JobTracker.java:3226) 
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
at java.lang.reflect.Method.invoke(Unknown Source) 
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:557) 
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1434) 
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1430) 
at java.security.AccessController.doPrivileged(Native Method) 
at javax.security.auth.Subject.doAs(Unknown Source) 
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1127) 
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1428)
{code}

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