Minor correction - port is 50075: http://10.32.56.159:50075/logs/userlogs/
On Fri, Jul 2, 2010 at 12:32 AM, Alberto Luengo Cabanillas < [email protected]> wrote: > Hi! Supposing that you´re using a virtualized environment, you should be > able to get to JobTracker Web Admin Interface from http:// > <your_virtualized_ > machine_ip>:50070/logs/userlogs. In case you´re running Hadoop from inside > a > cluster frontend, use this machine´s IP. Inside this directory, it will > exist another one called "userlogs" where you will see all map and reduce > tasks launch by the JobTracker and the TaskTrackers. These tasks will look > like 'job_[m,r]_0_xxxxxx' (or similar). Inside of every one of them there > will be three subdirectories (stdout, stdlog and stderr) which will contain > all your debugging messages. > Inside my MapReduce development programs I use the Java *LOG* class in a > sentence like this: > > private static final Log LOG = > LogFactory.getLog(<your_class_name>.class.getName()); > LOG.info("***********INSIDE MY REDUCER SETUP**********"); > > Besides these messages, a normal "System.out.println(...)" will also appear > in the above directories. > > Hope it helps! > > 2010/7/2 abc xyz <[email protected]> > > > Hi folks, > > > > I want to just display the output of my mapper on console or want to log > it > > in > > some file. System.out.println and Log4j's logger are not displaying the > > output. > > How can I see the intermediate results? > > > > Cheers > > > > > > > > > > > > > -- > Alberto >
