[ http://issues.apache.org/jira/browse/HADOOP-749?page=all ]
Doug Cutting updated HADOOP-749:
--------------------------------
Status: Resolved (was: Patch Available)
Resolution: Fixed
I just committed this. Thanks, Owen!
> The jobfailures.jsp gets a NullPointerException after a task tracker has been
> lost
> ----------------------------------------------------------------------------------
>
> Key: HADOOP-749
> URL: http://issues.apache.org/jira/browse/HADOOP-749
> Project: Hadoop
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.8.0
> Reporter: Owen O'Malley
> Assigned To: Owen O'Malley
> Fix For: 0.9.0
>
> Attachments: jsp-null.patch
>
>
> The job tracker gets a NullPointerException:
> 2006-11-27 06:59:25,148 WARN /: /jobfailures.jsp?jobid=job_0001&kind=map:
> java.lang.NullPointerException
> at
> org.apache.hadoop.mapred.jobfailures_jsp.printFailedAttempts(jobfailu
> res_jsp.java:57)
> at
> org.apache.hadoop.mapred.jobfailures_jsp.printFailures(jobfailures_js
> p.java:103)
> at
> org.apache.hadoop.mapred.jobfailures_jsp._jspService(jobfailures_jsp.
> java:168)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:427
> )
> at
> org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicati
> onHandler.java:475)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:5
> 67)
> at org.mortbay.http.HttpContext.handle(HttpContext.java:1565)
> at
> org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplication
> Context.java:635)
> at org.mortbay.http.HttpContext.handle(HttpContext.java:1517)
> at org.mortbay.http.HttpServer.service(HttpServer.java:954)
> at org.mortbay.http.HttpConnection.service(HttpConnection.java:814)
> at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:981)
> at org.mortbay.http.HttpConnection.handle(HttpConnection.java:831)
> at
> org.mortbay.http.SocketListener.handleConnection(SocketListener.java:
> 244)
> at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
> at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
> when there is a lost task tracker. Since the task tracker was lost, when the
> jsp tries to get the task tracker object for that task, it gets a null value.
> The jsp needs to protect itself from nulls.
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