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?

If possible, please help me out? Thank you very much!!

Best,
Rita :)

Hi,

On Mon, Sep 6, 2010 at 9:49 AM, Rita Liu <[EMAIL PROTECTED]> 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 :)
>

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 <[EMAIL PROTECTED]>wrote:

> Hi,
>
> On Mon, Sep 6, 2010 at 9:49 AM, Rita Liu <[EMAIL PROTECTED]> 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 :)
> >
>

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 <[EMAIL PROTECTED]> 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 <[EMAIL PROTECTED]>wrote:
>
>> Hi,
>>
>> On Mon, Sep 6, 2010 at 9:49 AM, Rita Liu <[EMAIL PROTECTED]> 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 :)
>> >
>>
>
>