On Mon, Mar 03, 2014 at 09:03:28AM -0500, JCAD Cell 1 wrote: > With the services stopped you would change the setting in core-site.xml: > <property> > <name>hadoop.tmp.dir</name> > <value>/var/hadoop/tmp</value> > </property> > > Then move your /tmp/hadoop folder over to the new location: > mv /tmp/hadoop /var/hadoop/tmp
Thank you, since the machine did a reboot, so all files in /tmp/hadoop-user, the previous default direcotry of hadoop.tmp.dir, were gone. So that's the problem, no files to left, if the namenode can't re-create its name space, then I think the only way is to format the namenode again? -- Thanks, Chengwei > > > > On Mon, Mar 3, 2014 at 5:55 AM, Chengwei Yang <chengwei.yang...@gmail.com> > wrote: > > On Mon, Mar 03, 2014 at 01:57:49PM +0530, shashwat shriparv wrote: > > NO need to format just change the value and restart the cluster; > > Hmm, seems it doesn't work for me, if the only need to do is to change > to another directory, then why it can not re-init the directory in /tmp > just as another directory? > > If I changed to another directory, a new directory, the same error > happen. > > -- > Thanks, > Chengwei > > > > > > > Warm Regards_∞_ > > Shashwat Shriparv > > http://www.linkedin.com/pub/shashwat-shriparv/19/214/2a9https:// > twitter.com/ > > shriparvhttps://www.facebook.com/shriparvhttp://google.com/ > +ShashwatShriparv > > http://www.youtube.com/user/sShriparv/videoshttp://profile.yahoo.com/ > > SWXSTW3DVSDTF2HHSRM47AV6DI/ > > > > > > > > On Mon, Mar 3, 2014 at 1:55 PM, Chengwei Yang > <chengwei.yang...@gmail.com > > > > wrote: > > > > On Mon, Mar 03, 2014 at 11:56:08AM +0530, shashwat shriparv wrote: > > > Ya its always better to change the temp dir path in hadoop, as it > will > > prevent > > > deletion of file while the server reboots. > > > > Thanks, so is there anyway to recovery from this state? Or I have to > format > > namenode again? > > > > -- > > Thanks, > > Chengwei > > > > > > > > > > > Warm Regards_∞_ > > > Shashwat Shriparv > > > http://www.linkedin.com/pub/shashwat-shriparv/19/214/2a9https:// > > twitter.com/ > > > shriparvhttps://www.facebook.com/shriparvhttp://google.com/ > > +ShashwatShriparv > > > http://www.youtube.com/user/sShriparv/videoshttp:// > profile.yahoo.com/ > > > SWXSTW3DVSDTF2HHSRM47AV6DI/ > > > > > > > > > > > > On Mon, Mar 3, 2014 at 11:52 AM, Chengwei Yang < > > chengwei.yang...@gmail.com> > > > wrote: > > > > > > On Mon, Mar 03, 2014 at 11:25:59AM +0530, shashwat shriparv > wrote: > > > > You can use any directory you like beside permissions are > right. > > > > > > I mean if it's better if we change the default hadoop.tmp.dir? > > Because it > > > can not work cross reboot in default Linux environment. > > > > > > -- > > > Thanks, > > > Chengwei > > > > > > > > > > > > > > > Warm Regards_∞_ > > > > Shashwat Shriparv > > > > http://www.linkedin.com/pub/shashwat-shriparv/19/214/ > 2a9https:// > > > twitter.com/ > > > > shriparvhttps://www.facebook.com/shriparvhttp://google.com/ > > > +ShashwatShriparv > > > > http://www.youtube.com/user/sShriparv/videoshttp:// > > profile.yahoo.com/ > > > > SWXSTW3DVSDTF2HHSRM47AV6DI/ > > > > > > > > > > > > > > > > On Mon, Mar 3, 2014 at 11:07 AM, Chengwei Yang < > > > chengwei.yang...@gmail.com> > > > > wrote: > > > > > > > > Hi List, > > > > > > > > I'm confusing by hadoop.tmp.dir currently because its > default > > value > > > > "/tmp/hadoop-${user.name}" always means a directory in > tmpfs in > > > Linux. > > > > So after the name node machine reboot, it gone away and > then > > name > > > node > > > > fail to start. > > > > > > > > I found this was reported here. > > > > > http://mail-archives.apache.org/mod_mbox/hadoop-hdfs-user > / > > 201205.mbox > > > / > > > > %3cbay148-w22bf95c5fbe2c40bf7cd9f86...@phx.gbl%3E > > > > > > > > As I found from http://hadoop.apache.org/docs/r2.3.0/, > there > > are a > > > lot > > > > properties are based on hadoop.tmp.dir, like > > > > dfs.namenode.name.dir > file://${hadoop.tmp.dir}/dfs/name > > > > > > > > I'm wondering, if we can set the default value of > > hadoop.tmp.dir to > > > > a non-tmpfs direcotry if it doesn't work at all by using > a real > > tmpfs > > > > directory? > > > > > > > > -- > > > > Thanks, > > > > Chengwei > > > > > > > > > > > > > > > > > > > >
