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Posted to dev@hbase.apache.org by Akash Ashok <th...@gmail.com> on 2011/12/23 08:22:09 UTC
Contacting a wrong regions
Hi All,
We currently have an issue in our HBase cluster that 2 of our regions on a
regions server have gone down. We can't enable or disable the regions. Are
there any tools to get the data out of it from HDFS files ?
We are ok with recreating the indices only for the keys in that region.
Cheers,
Akash A
Re: Contacting a wrong regions
Posted by Akash Ashok <th...@gmail.com>.
Sorry for the wrong subject. I Changed it and sent another mail.
On Fri, Dec 23, 2011 at 12:52 PM, Akash Ashok <th...@gmail.com>wrote:
> Hi All,
> We currently have an issue in our HBase cluster that 2 of our regions on a
> regions server have gone down. We can't enable or disable the regions. Are
> there any tools to get the data out of it from HDFS files ?
> We are ok with recreating the indices only for the keys in that region.
>
> Cheers,
> Akash A
>
Re: Contacting a wrong regions
Posted by Stack <st...@duboce.net>.
On Wed, Dec 28, 2011 at 1:03 AM, Akash Ashok <th...@gmail.com> wrote:
> Also we have a lot of holes in .META. Are there tools for 0.20.6 which we
> can use to patch them ?
>
Back then there was the loadtable tool in bin dir. It'd read the
content of the filesystem and replace current regions with what is in
the filesystem. Otherwise, you could try the check_meta script.
IIRC, it was in hbase then. See what it says. You might have to mess
a little w/ the script to get it to work.
St.Ack
Re: Contacting a wrong regions
Posted by Akash Ashok <th...@gmail.com>.
Also we have a lot of holes in .META. Are there tools for 0.20.6 which we
can use to patch them ?
Cheers,
Akash A
On Wed, Dec 28, 2011 at 1:44 PM, Akash Ashok <th...@gmail.com> wrote:
> Hi Stack,
> hbck is not available on our cluster. We are running on age old 0.20.6 and
> I presume hbck was made available only from 0.90.
> I will try to compile only HbaseFsck and related classes and see if i can
> run that. Do you see any other way ?
>
> Cheers,
> Akash A
>
>
> On Wed, Dec 28, 2011 at 11:09 AM, Stack <st...@duboce.net> wrote:
>
>> On Thu, Dec 22, 2011 at 11:22 PM, Akash Ashok <th...@gmail.com>
>> wrote:
>> > Hi All,
>> > We currently have an issue in our HBase cluster that 2 of our regions
>> on a
>> > regions server have gone down. We can't enable or disable the regions.
>>
>> Hey Akash:
>>
>> Whats 'gone down' mean? You have holes in your .META. table?
>>
>> When you run hbck what do you see?
>>
>>
>> > Are
>> > there any tools to get the data out of it from HDFS files ?
>> > We are ok with recreating the indices only for the keys in that region.
>> >
>>
>>
>>
>> As Ram suggests, you can see the edits using the HFile tool.
>>
>>
>> If you "cant" get the old regions online, you could create new regions
>> to take their place and just put the hfiles under the new regions
>> before they are deployed -- that should work?
>>
>>
>>
>>
>> St.Ack
>>
>> > Cheers,
>> > Akash A
>>
>
>
Re: Contacting a wrong regions
Posted by Akash Ashok <th...@gmail.com>.
Hi Stack,
hbck is not available on our cluster. We are running on age old 0.20.6 and
I presume hbck was made available only from 0.90.
I will try to compile only HbaseFsck and related classes and see if i can
run that. Do you see any other way ?
Cheers,
Akash A
On Wed, Dec 28, 2011 at 11:09 AM, Stack <st...@duboce.net> wrote:
> On Thu, Dec 22, 2011 at 11:22 PM, Akash Ashok <th...@gmail.com>
> wrote:
> > Hi All,
> > We currently have an issue in our HBase cluster that 2 of our regions on
> a
> > regions server have gone down. We can't enable or disable the regions.
>
> Hey Akash:
>
> Whats 'gone down' mean? You have holes in your .META. table?
>
> When you run hbck what do you see?
>
>
> > Are
> > there any tools to get the data out of it from HDFS files ?
> > We are ok with recreating the indices only for the keys in that region.
> >
>
>
>
> As Ram suggests, you can see the edits using the HFile tool.
>
>
> If you "cant" get the old regions online, you could create new regions
> to take their place and just put the hfiles under the new regions
> before they are deployed -- that should work?
>
>
>
>
> St.Ack
>
> > Cheers,
> > Akash A
>
Re: Contacting a wrong regions
Posted by Stack <st...@duboce.net>.
On Thu, Dec 22, 2011 at 11:22 PM, Akash Ashok <th...@gmail.com> wrote:
> Hi All,
> We currently have an issue in our HBase cluster that 2 of our regions on a
> regions server have gone down. We can't enable or disable the regions.
Hey Akash:
Whats 'gone down' mean? You have holes in your .META. table?
When you run hbck what do you see?
> Are
> there any tools to get the data out of it from HDFS files ?
> We are ok with recreating the indices only for the keys in that region.
>
As Ram suggests, you can see the edits using the HFile tool.
If you "cant" get the old regions online, you could create new regions
to take their place and just put the hfiles under the new regions
before they are deployed -- that should work?
St.Ack
> Cheers,
> Akash A