Hi,
I am running a map-reduce job in Python and I get this error message. I
do not understand what it means. Output is not written to HDFS. I am using
CDH3u3. Any suggestion is appreciated.
MapAttempt TASK_TYPE=MAP TASKID=task_201208232245_2812_m_00
Here's a snippet of tasktracker metrics using Metrics2. (I think there were
(more) gaps in the pre-metrics2 versions.)
Note that you'll need to have hadoop-env.sh and hadoop-metrics2.properties
setup on all the nodes you want reports from.
1345570905436 ugi.ugi: context=ugi,
Hi David,
I enabled the jvm.class of the hadoop-metrics.properties, you're
output seems to be from something else (dfs.class or mapred.class) which
reports hadoop deamons performace. For example your output shows
processName=TaskTracker
which I'm not looking for.
How can I report jvm
Hi All,
My Hadoop streaming job (in Python) runs to completion (both map and
reduce says 100% complete). But, when I look at the output directory in
HDFS, the part files are empty. I do not know what might be causing this
behavior. I understand that the percentages represent the records that
Do you observe the same thing when running without Hadoop? (cat, map, sort
and then reduce)
Could you provide the counters of your job? You should be able to get them
using the job tracker interface.
The most probable answer without more information would be that your
reducer do not output any
