Nope... and there were no failed tasks.
On Mar 3, 2009, at 5:16 PM, Runping Qi wrote:
Were task Trackers black-listed?
On Tue, Mar 3, 2009 at 3:25 PM, Nathan Marz <nat...@rapleaf.com>
wrote:
I'm seeing some really bizarre behavior from Hadoop 0.19.1. I have
a fairly
large job with about 29000 map tasks and 72 reducers. there are 304
map task
slots in the cluster. When the job starts, it runs 304 map tasks at
a time.
As time goes on the number of map tasks run concurrently drops. For
at least
half of the execution exactly 152 mappers were run at a time.
Towards, the
end , when there were only 100 or so tasks remaining, the number of
concurrent mappers quickly fell to 2 at a time, bringing the end of
the map
phase to a crawl. This was the only job running on the cluster. Has
anyone
else seen behavior like this?
