Hi :) I did check stdout under userlogs, but it's empty. If I want to see the log messages I add to mapper and reducer, should I check them only in the runtime?
Thanks a lot! On Sun, Sep 5, 2010 at 10:59 PM, Rita Liu <crystaldol...@gmail.com> wrote: > Thanks so much for the kind reply! :) I looked at the web ui of jobtracker > (50030) but still couldn't find my logger messages. Could you please explain > a little more? Thanks a lot! > -Rita :) > > > On Sun, Sep 5, 2010 at 10:47 PM, Hemanth Yamijala <yhema...@gmail.com>wrote: > >> Hi, >> >> On Mon, Sep 6, 2010 at 9:49 AM, Rita Liu <crystaldol...@gmail.com> wrote: >> > Hi! :) >> > >> > I add some Log4j loggers into the mapper, the reducer, and the main >> method >> > of WordCount.java. However, after I run this application on the cluster, >> I >> > couldn't find any of my log messages from WordCount in any of the hadoop >> log >> > files (JobTracker, TaskTracker, Namenode, Secondary Namenode, Datanode). >> How >> > may I see my logging messages from WordCount, or, any of the MapReduce >> > applications? >> > >> >> logger messages added to the mapper and reducers are added to user >> logs that are generated on the cluster where the tasks run. You can >> view them from the web ui of the jobtracker, if you navigate to the >> job, and then its tasks. >> >> Thanks >> Hemanth >> >> > If possible, please help me out? Thank you very much!! >> > >> > Best, >> > Rita :) >> > >> > >
