actuall these are all logs in the stderr, and stdout is empty
On Fri, Jan 3, 2014 at 4:12 PM, Azuryy Yu <azury...@gmail.com> wrote: > Hi Harsh, > There is only three warnnings in stderr > > *stderr logs* > > log4j:WARN No appenders could be found for logger > (org.apache.hadoop.mapred.Child). > log4j:WARN Please initialize the log4j system properly. > log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more > info. > > > > > On Fri, Jan 3, 2014 at 1:59 PM, Harsh J <ha...@cloudera.com> wrote: > >> Hi again, >> >> I did not mention the TaskTracker log, but the actual Task JVM's >> syslog/stderr/stdout. Do those log *any* problems at all? >> >> On Fri, Jan 3, 2014 at 11:16 AM, Azuryy Yu <azury...@gmail.com> wrote: >> > Hi Harsh, >> > Thanks. >> > >> > There is no any error logs for attempt_201312201200_34795_r_000000_0 in >> the >> > tasktracker log. only '0.0% reduce > copy >' >> > >> > I configured all hosts in all slaves and master. >> > >> > This job has only one reduce. it hanged. but I configured everybody's >> max >> > job running to '1' in the Fair scheduler file. >> > >> > but some people's max job running greater than one. and these people's >> job >> > never hanged... >> > >> > >> > On Fri, Jan 3, 2014 at 1:13 PM, Harsh J <ha...@cloudera.com> wrote: >> >> >> >> Does the Reduce task log (of attempt_201312201200_34795_r_000000_0) >> >> show any errors in trying to communicate with the various TaskTrackers >> >> in trying to obtain the data? >> >> >> >> On Fri, Jan 3, 2014 at 9:54 AM, Azuryy Yu <azury...@gmail.com> wrote: >> >> > Add addtional: >> >> > >> >> > Our MR version is 1.2.1, not 1.0.4 >> >> > >> >> > There is no useful information in the JT log. >> >> > >> >> > >> >> > On Fri, Jan 3, 2014 at 12:20 PM, Azuryy Yu <azury...@gmail.com> >> wrote: >> >> >> >> >> >> Hi, >> >> >> >> >> >> Our prod cluster met some issues recently, >> >> >> All map tasks finished successfully, but reduce task hanged. >> >> >> >> >> >> but It's not happened on all TaskTrackers, only sometimes. we used >> >> >> mapred-1.0.4 >> >> >> >> >> >> There is "0.0% reduce > copy >" forever until kill task manually. >> >> >> >> >> >> reduce logs on the TaskTracker: >> >> >> hadoop-hadoop-tasktracker-10-200-91-186.out:14/01/03 06:13:57 INFO >> >> >> mapred.TaskTracker: JVM with ID: jvm_201312201200_34795_r_-365330778 >> >> >> given >> >> >> task: attempt_201312201200_34795_r_000000_0 >> >> >> hadoop-hadoop-tasktracker-10-200-91-186.out:14/01/03 06:14:04 INFO >> >> >> mapred.TaskTracker: attempt_201312201200_34795_r_000000_0 0.0% >> reduce > >> >> >> copy >> >> >> > >> >> >> hadoop-hadoop-tasktracker-10-200-91-186.out:14/01/03 06:14:08 INFO >> >> >> mapred.TaskTracker: attempt_201312201200_34795_r_000000_0 0.0% >> reduce > >> >> >> copy >> >> >> > >> >> >> hadoop-hadoop-tasktracker-10-200-91-186.out:14/01/03 06:14:14 INFO >> >> >> mapred.TaskTracker: attempt_201312201200_34795_r_000000_0 0.0% >> reduce > >> >> >> copy >> >> >> > >> >> >> hadoop-hadoop-tasktracker-10-200-91-186.out:14/01/03 06:14:17 INFO >> >> >> mapred.TaskTracker: attempt_201312201200_34795_r_000000_0 0.0% >> reduce > >> >> >> copy >> >> >> > >> >> >> hadoop-hadoop-tasktracker-10-200-91-186.out:14/01/03 06:14:23 INFO >> >> >> mapred.TaskTracker: attempt_201312201200_34795_r_000000_0 0.0% >> reduce > >> >> >> copy >> >> >> > >> >> > >> >> > >> >> >> >> >> >> >> >> -- >> >> Harsh J >> > >> > >> >> >> >> -- >> Harsh J >> > >
