We see this in some of our reduce jobs, on one particular cluster. This
is the only message in the log file for the failed reduce.
Exception in thread "main" java.lang.NullPointerException
at
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2059)
/**
* The main() for child processes.
*/
2039 public static class Child {
2041 public static void main(String[] args) throws Throwable {
2058 Task task = umbilical.getTask(taskid);
2059 JobConf job = new JobConf(task.getJobFile());
2060 TaskLog.cleanup(job.getInt("mapred.userlog.retain.hours", 24));
2061 task.setConf(job);
--
Jason Venner
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