Vamshi
If you have set the number of reduce slots in a node to 5 and if
you have 4 nodes, then your cluster can run a max of 5*4 = 20 reduce tasks
at a time. If more reduce tasks are present those has to wait till
reduce slots becomes available.
In reducer the data locality is not
It relates to: https://issues.apache.org/jira/browse/MAPREDUCE-3505
Thanks.
On 03/01/2012 07:09 AM, Ioan Eugen Stan wrote:
Hi Mingjie,
I don't know about Yarn, but NoClassDefFoundError appear when you have a
class that was present during compile time but no longer available
during runtime.
Thank you very much. But that does not help. I did try to symbolic link
one into my working directory -files
conf/log4j.proeprties#mylog4j.properties, and then put a specified
configuration in jvm options
property
namemapred.child.java.opts/name
value
Hi all,
The FileOutputFormat/FileOutputCommitter always treats an output path
as a directory and write files under it, even if there is only one
Reducer. Is there any way to configure an OutputFormat to write all
data into a file?
Thanks,
James
