[MAPREDUCE-2058] FairScheduler:NullPointerException in web interface when JobTracker not initialized

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.22.0, 1.0.4
• Component/s: contrib/fair-share
• Labels: BB2015-05-TBR
• Assignee: Unassigned
• Reporter: Dan Adkins
• Created: 09/Sep/10 18:16
• Updated: 06/May/15 03:31

Description

When I contact the jobtracker web interface prior to the job tracker being fully initialized (say, if hdfs is still in safe mode), I get the following error:

10/09/09 18:06:02 ERROR mortbay.log: /jobtracker.jsp
java.lang.NullPointerException
at org.apache.hadoop.mapred.FairScheduler.getJobs(FairScheduler.java:909)
at org.apache.hadoop.mapred.JobTracker.getJobsFromQueue(JobTracker.java:4357)
at org.apache.hadoop.mapred.JobTracker.getQueueInfoArray(JobTracker.java:4334)
at org.apache.hadoop.mapred.JobTracker.getRootQueues(JobTracker.java:4295)
at org.apache.hadoop.mapred.jobtracker_jsp.generateSummaryTable(jobtracker_jsp.java:44)
at org.apache.hadoop.mapred.jobtracker_jsp._jspService(jobtracker_jsp.java:176)
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:502)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1124)
at org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:857)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1115)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:361)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)