Thanks for your reply, J-D. There is no such file hbase.version under the
hbase root directory, and this morning i found something even worse
happened. The data under hbase root directory ( i use the default
/tmp/hbase-{user.home}/root ) disappeared......originally there was a folder
corresponding to each table and i guess most of the data are physically
stored there.
This is not the first time happening to me. Last time similar things
happened, and i addressed it using a naive way without thinking too much(
re-building the whole database ) and then it runs well for around a week,
and now it cames again. Do you have any idea what happened to the data?
Would it be because i use the /tmp directory which happened to be modified
by the system?
On Mon, Jul 21, 2008 at 7:58 AM, Jean-Daniel Cryans <[EMAIL PROTECTED]>
wrote:
> Arber,
>
> When the Master starts, it checks on the filesystem for a file named
> "hbase.version" in your HBase root folder. If the version of your HBase
> distribution changed OR if the file is missing, it will throw the error you
> see. I would advise confirming that the file is still there.
>
> Also, the migrate script first tries to connect to the Master to make sure
> it is offline. It retries a couple of times (the error you see) then
> proceed
> to doing the migration.
>
> Hope it helps,
>
> J-D
>
> On Mon, Jul 21, 2008 at 5:17 AM, Yabo-Arber Xu <[EMAIL PROTECTED]>
> wrote:
>
> > Greetings,
> >
> > I am right now using hbase in our project in "stand-alone" mode. It
> worked
> > well until today I found the following message in the log:
> >
> > 2008-07-21 01:16:38,564 FATAL org.apache.hadoop.hbase.HMaster: Not
> starting
> > HMaster because: org.apache.hadoop.hbase.FileSystemVersionException: File
> > system needs to be upgraded. Run the '${HBASE_HOME}/bin/hbase migrate'
> > script.
> >
> > I actually did not do any version change recently. But, anyway, i
> followed
> > the message and tried to do "hbase migrate", but it keeps showing me the
> > following error:
> >
> > 08/07/21 02:11:51 INFO ipc.Client: Retrying connect to server: localhost/
> > 127.0.0.1:60000. Already tried 1 time(s).
> >
> > The same error occurs when i try to do any query through hbase shell.
> This
> > is just wierd....I did not touch any part of the hbase, and the error
> just
> > sundenly came out. Any ideas why?
> >
> > Thanks for your help! The whole project is just stuck here by this error.
> >
> > Arber
>
>
