I mean, two nodes here is tasktrackers. ----- Original Message ----- From: Humayun gmail <humayun0...@gmail.com> Date: Sunday, October 16, 2011 7:38 pm Subject: Re: Too much fetch failure To: common-user@hadoop.apache.org
> yes we can ping every node (both master and slave). > > On 16 October 2011 19:52, Uma Maheswara Rao G 72686 > <mahesw...@huawei.com>wrote: > > Are you able to ping the other node with the configured hostnames? > > > > Make sure that you should be able to ping to the other machine > with the > > configured hostname in ect/hosts files. > > > > Regards, > > Uma > > ----- Original Message ----- > > From: praveenesh kumar <praveen...@gmail.com> > > Date: Sunday, October 16, 2011 6:46 pm > > Subject: Re: Too much fetch failure > > To: common-user@hadoop.apache.org > > > > > try commenting 127.0.0.1 localhost line in your /etc/hosts and > then> > restartthe cluster and then try again. > > > > > > Thanks, > > > Praveenesh > > > > > > On Sun, Oct 16, 2011 at 2:00 PM, Humayun gmail > > > <humayun0...@gmail.com>wrote: > > > > we are using hadoop on virtual box. when it is a single node > then> > it works > > > > fine for big dataset larger than the default block size. but in > > > case of > > > > multinode cluster (2 nodes) we are facing some problems. > > > > Like when the input dataset is smaller than the default block > > > size(64 MB) > > > > then it works fine. but when the input dataset is larger than > the> > default> block size then it shows ‘too much fetch failure’ in > > > reduce state. > > > > here is the output link > > > > http://paste.ubuntu.com/707517/ > > > > > > > > From the above comments , there are many users who faced this > > > problem.> different users suggested to modify the /etc/hosts file > > > in different manner > > > > to fix the problem. but there is no ultimate solution.we need > the> > actual> solution thats why we are writing here. > > > > > > > > this is our /etc/hosts file > > > > 192.168.60.147 humayun # Added by NetworkManager > > > > 127.0.0.1 localhost.localdomain localhost > > > > ::1 humayun localhost6.localdomain6 localhost6 > > > > 127.0.1.1 humayun > > > > > > > > # The following lines are desirable for IPv6 capable hosts > > > > ::1 localhost ip6-localhost ip6-loopback > > > > fe00::0 ip6-localnet > > > > ff00::0 ip6-mcastprefix > > > > ff02::1 ip6-allnodes > > > > ff02::2 ip6-allrouters > > > > ff02::3 ip6-allhosts > > > > > > > > 192.168.60.1 master > > > > 192.168.60.2 slave > > > > > > > > > >
