I've fixed the problem.
The reason namenode won't start was that I accidentally started the cluster
with root account.
This somehow changed the ownership of some hadoop-related files(ex: log
files, and hadoop.tmp.dir/dfs/name/current/edits) from hadoop:hadoop to
After I fixed the ownership issue, everything went fine.
Thanks for the concern.
2010/8/5 Harsh J <[EMAIL PROTECTED]>
> Could you check the NameNode/SecondaryNameNode logs and try to find
> the exact issue? Post the errors (if) it contains here, so we can try
> to help you better.
> On Thu, Aug 5, 2010 at 9:39 AM, edward choi <[EMAIL PROTECTED]> wrote:
> > I am currently stuck with hadoop namenode that won't start.
> > When I type "start-all.sh", everything prints out fine.
> > But when I type "jps", only JobTracker is activated.
> > When this happens, I usually format the namenode.
> > But the problem is that there are 500gigs of date in HDFS.
> > So I really want to save the data.
> > Can anyone give help please?
> Harsh J