[jira] Commented: (HADOOP-5608) NullPointerException when retrieving task reports

[sam rash (JIRA)]

    [ 
https://issues.apache.org/jira/browse/HADOOP-5608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12694639#action_12694639
 ] 

sam rash commented on HADOOP-5608:
----------------------------------

code that brought about this bug;  hangs on one particular job in the loop to 
get map task reports.

{code}
log.info("start: querying hadoop job tracker %s", 
conf.get("mapred.job.tracker"));

for (JobStatus jobStatus : jobClient.getAllJobs()) {
    List<MapTaskProfile> mapTaskProfileList = new ArrayList<MapTaskProfile>();
    for (TaskReport taskReport : 
jobClient.getMapTaskReports(jobStatus.getJobID())) {
        mapTaskProfileList.add(new MapTaskProfile(taskReport, 
jobStatus.getJobID().toString()));
    }

        List<ReduceTaskProfile> reduceTaskProfileList = new 
ArrayList<ReduceTaskProfile>();
        for (TaskReport taskReport : 
jobClient.getReduceTaskReports(jobStatus.getJobID())) {
                reduceTaskProfileList.add(new ReduceTaskProfile(taskReport, 
jobStatus.getJobID().toString()));
        }

        RunningJob runningJob = jobClient.getJob(jobStatus.getJobID());
        if (runningJob != null) {
                eventList.add(new JobProfileEvent(eventBatchId.get(), new 
DateTime(),
                        new JobProfile(jobStatus, runningJob.getJobName(), 
mapTaskProfileList, reduceTaskProfileList, runningJob.getCounters()))
                );
        }
}

log.info("end: querying hadoop job tracker %s", conf.get("mapred.job.tracker"));
{code}


if i try to view the info of this job from the jobtracker gui, i also get a 500 
and the logs show the same NPE

2009-04-01 17:40:06,400 WARN /: 
/jobdetails.jsp?jobid=job_200902281847_18859&refresh=0: 
java.lang.NullPointerException



> NullPointerException when retrieving task reports
> -------------------------------------------------
>
>                 Key: HADOOP-5608
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5608
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.19.0
>            Reporter: sam rash
>
> It appears as thought Counters is null for a given task which causes an NPE 
> in the logs (and clients to hang)

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