There's is a big chance that your map output is being copied to your reducer, this could take quite some time if you have a lot of data and could be resolved by:
1) having more reducers 2) adjust the slowstart parameter so that the copying can start while the map tasks are still running Regards, Dieter 2014-03-27 20:42 GMT+01:00 Clay McDonald <stuart.mcdon...@bateswhite.com>: > Thanks Serge, looks like I need to at memory to my datanodes. > > Clay McDonald > Cell: 202.560.4101 > Direct: 202.747.5962 > > -----Original Message----- > From: Serge Blazhievsky [mailto:hadoop...@gmail.com] > Sent: Thursday, March 27, 2014 2:16 PM > To: user@hadoop.apache.org > Cc: <user@hadoop.apache.org> > Subject: Re: Maps stuck on Pending > > Next step would be to look in the logs under userlog directory for that job > > Sent from my iPhone > > > On Mar 27, 2014, at 11:08 AM, Clay McDonald < > stuart.mcdon...@bateswhite.com> wrote: > > > > Hi all, I have a job running with 1750 maps and 1 reduce and the status > has been the same for the last two hours. Any thoughts? > > > > Thanks, Clay >
