I've looked around for a while, but it seems there isn't a way to log
from Hadoop, without going through the logs/userlogs/ and the
'attempt' directories? That would mean that for logging I'm
restricted to writing to System.out and System.err, then collecting
via scripts?
Thanks.
On Nov 11, 2008, at 9:53 PM, Alex Loddengaard wrote:
Have you seen this:
<http://wiki.apache.org/hadoop/HowToDebugMapReducePrograms>
Alex
On Tue, Nov 11, 2008 at 6:03 PM, ZhiHong Fu <[EMAIL PROTECTED]>
wrote:
Hello,
I'm very sorry to trouble you, I'm developing a MapReduce
Application, And I can get Log.INFO in InputFormat ,but In Mapper or
Reducer
, I can't get anything
. And Now an error occured in the reduce stage. Because the code is a
little
complicated, I can't find where is the mistake just form the thrown
exception. I want to use
log4j to log the intermediate info. But I have tried a whole day ,
Now I
can't still get anything. who can help me? Thanks very much.
ddream.
