Hi Everyone,
  I did a  "status 'detailed'" and found 3 dead region servers. I was hoping that the dead region servers would go aways after a while but they seem to exist for a long time now. Is there a way for these to be removed without restarting the master.
Using hbase 0.90.4-cdh3u3
Regards,
Samar

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The easiest way is to restart your HBaseMaster. The next active master will
not register the dead RS.
On Mon, Feb 4, 2013 at 1:07 PM, Samar Kumar <[EMAIL PROTECTED]> wrote:

> Hi Everyone,
>   I did a  "status 'detailed'" and found 3 dead region servers. I was
> hoping that the dead region servers would go aways after a while but they
> seem to exist for a long time now. Is there a way for these to be removed
> without restarting the master.
> Using hbase 0.90.4-cdh3u3
> Regards,
> Samar
>
> ________________________________
>
> The information contained in this communication is intended solely for the
> use of the individual or entity to whom it is addressed and others
> authorized to receive it. It may contain confidential or legally privileged
> information. If you are not the intended recipient you are hereby notified
> that any disclosure, copying, distribution or taking any action in reliance
> on the contents of this information is strictly prohibited and may be
> unlawful. If you have received this communication in error, please notify
> us immediately by responding to this email and then delete it from your
> system. The firm is neither liable for the proper and complete transmission
> of the information contained in this communication nor for any delay in its
> receipt.
>

--
Adrien Mogenet
06.59.16.64.22
http://www.mogenet.me

Thanks Adrien.
Sure , but is there any other way without stoping the masters. Anything
like cleaning the zk. Is there a time-out which cleans the dead rs or max
count .
Regards,
Samar

On 05/02/13 12:38 AM, "Adrien Mogenet" <[EMAIL PROTECTED]> wrote:

>The easiest way is to restart your HBaseMaster. The next active master
>will
>not register the dead RS.
>
>
>On Mon, Feb 4, 2013 at 1:07 PM, Samar Kumar <[EMAIL PROTECTED]>
>wrote:
>
>> Hi Everyone,
>>   I did a  "status 'detailed'" and found 3 dead region servers. I was
>> hoping that the dead region servers would go aways after a while but
>>they
>> seem to exist for a long time now. Is there a way for these to be
>>removed
>> without restarting the master.
>> Using hbase 0.90.4-cdh3u3
>> Regards,
>> Samar
>>
>> ________________________________
>>
>> The information contained in this communication is intended solely for
>>the
>> use of the individual or entity to whom it is addressed and others
>> authorized to receive it. It may contain confidential or legally
>>privileged
>> information. If you are not the intended recipient you are hereby
>>notified
>> that any disclosure, copying, distribution or taking any action in
>>reliance
>> on the contents of this information is strictly prohibited and may be
>> unlawful. If you have received this communication in error, please
>>notify
>> us immediately by responding to this email and then delete it from your
>> system. The firm is neither liable for the proper and complete
>>transmission
>> of the information contained in this communication nor for any delay in
>>its
>> receipt.
>>
>
>
>
>--
>Adrien Mogenet
>06.59.16.64.22
>http://www.mogenet.me

Hi,

Looking at the code, no.

Nicolas
On Tue, Feb 5, 2013 at 9:21 AM, samar kumar <[EMAIL PROTECTED]>wrote:

> Thanks Adrien.
> Sure , but is there any other way without stoping the masters. Anything
> like cleaning the zk. Is there a time-out which cleans the dead rs or max
> count .
> Regards,
> Samar
>
> On 05/02/13 12:38 AM, "Adrien Mogenet" <[EMAIL PROTECTED]> wrote:
>
> >The easiest way is to restart your HBaseMaster. The next active master
> >will
> >not register the dead RS.
> >
> >
> >On Mon, Feb 4, 2013 at 1:07 PM, Samar Kumar <[EMAIL PROTECTED]>
> >wrote:
> >
> >> Hi Everyone,
> >>   I did a  "status 'detailed'" and found 3 dead region servers. I was
> >> hoping that the dead region servers would go aways after a while but
> >>they
> >> seem to exist for a long time now. Is there a way for these to be
> >>removed
> >> without restarting the master.
> >> Using hbase 0.90.4-cdh3u3
> >> Regards,
> >> Samar
> >>
> >> ________________________________
> >>
> >> The information contained in this communication is intended solely for
> >>the
> >> use of the individual or entity to whom it is addressed and others
> >> authorized to receive it. It may contain confidential or legally
> >>privileged
> >> information. If you are not the intended recipient you are hereby
> >>notified
> >> that any disclosure, copying, distribution or taking any action in
> >>reliance
> >> on the contents of this information is strictly prohibited and may be
> >> unlawful. If you have received this communication in error, please
> >>notify
> >> us immediately by responding to this email and then delete it from your
> >> system. The firm is neither liable for the proper and complete
> >>transmission
> >> of the information contained in this communication nor for any delay in
> >>its
> >> receipt.
> >>
> >
> >
> >
> >--
> >Adrien Mogenet
> >06.59.16.64.22
> >http://www.mogenet.me
>
>
>

There really should be no issue or slowdown involved with restarting the
masters.  The operation only takes 1-2 seconds and is pretty much
transparent to clients.  We run hundreds of M/R jobs as well as a handful
of online APIs hitting hbase and have not seen any issue restarting masters
at will whenever we need to.
On Tue, Feb 5, 2013 at 4:04 AM, Nicolas Liochon <[EMAIL PROTECTED]> wrote:

> Hi,
>
> Looking at the code, no.
>
> Nicolas
>
>
> On Tue, Feb 5, 2013 at 9:21 AM, samar kumar <[EMAIL PROTECTED]
> >wrote:
>
> > Thanks Adrien.
> > Sure , but is there any other way without stoping the masters. Anything
> > like cleaning the zk. Is there a time-out which cleans the dead rs or max
> > count .
> > Regards,
> > Samar
> >
> > On 05/02/13 12:38 AM, "Adrien Mogenet" <[EMAIL PROTECTED]> wrote:
> >
> > >The easiest way is to restart your HBaseMaster. The next active master
> > >will
> > >not register the dead RS.
> > >
> > >
> > >On Mon, Feb 4, 2013 at 1:07 PM, Samar Kumar <[EMAIL PROTECTED]>
> > >wrote:
> > >
> > >> Hi Everyone,
> > >>   I did a  "status 'detailed'" and found 3 dead region servers. I was
> > >> hoping that the dead region servers would go aways after a while but
> > >>they
> > >> seem to exist for a long time now. Is there a way for these to be
> > >>removed
> > >> without restarting the master.
> > >> Using hbase 0.90.4-cdh3u3
> > >> Regards,
> > >> Samar
> > >>
> > >> ________________________________
> > >>
> > >> The information contained in this communication is intended solely for
> > >>the
> > >> use of the individual or entity to whom it is addressed and others
> > >> authorized to receive it. It may contain confidential or legally
> > >>privileged
> > >> information. If you are not the intended recipient you are hereby
> > >>notified
> > >> that any disclosure, copying, distribution or taking any action in
> > >>reliance
> > >> on the contents of this information is strictly prohibited and may be
> > >> unlawful. If you have received this communication in error, please
> > >>notify
> > >> us immediately by responding to this email and then delete it from
> your
> > >> system. The firm is neither liable for the proper and complete
> > >>transmission
> > >> of the information contained in this communication nor for any delay
> in
> > >>its
> > >> receipt.
> > >>
> > >
> > >
> > >
> > >--
> > >Adrien Mogenet
> > >06.59.16.64.22
> > >http://www.mogenet.me
> >
> >
> >
>

Thanks guys, we had to restart the master for another issue an that
cleaned the deadserver list too.
On 05/02/13 9:08 PM, "Bryan Beaudreault" <[EMAIL PROTECTED]> wrote:

>There really should be no issue or slowdown involved with restarting the
>masters.  The operation only takes 1-2 seconds and is pretty much
>transparent to clients.  We run hundreds of M/R jobs as well as a handful
>of online APIs hitting hbase and have not seen any issue restarting
>masters
>at will whenever we need to.
>
>
>On Tue, Feb 5, 2013 at 4:04 AM, Nicolas Liochon <[EMAIL PROTECTED]> wrote:
>
>> Hi,
>>
>> Looking at the code, no.
>>
>> Nicolas
>>
>>
>> On Tue, Feb 5, 2013 at 9:21 AM, samar kumar <[EMAIL PROTECTED]
>> >wrote:
>>
>> > Thanks Adrien.
>> > Sure , but is there any other way without stoping the masters.
>>Anything
>> > like cleaning the zk. Is there a time-out which cleans the dead rs or
>>max
>> > count .
>> > Regards,
>> > Samar
>> >
>> > On 05/02/13 12:38 AM, "Adrien Mogenet" <[EMAIL PROTECTED]>
>>wrote:
>> >
>> > >The easiest way is to restart your HBaseMaster. The next active
>>master
>> > >will
>> > >not register the dead RS.
>> > >
>> > >
>> > >On Mon, Feb 4, 2013 at 1:07 PM, Samar Kumar <[EMAIL PROTECTED]>
>> > >wrote:
>> > >
>> > >> Hi Everyone,
>> > >>   I did a  "status 'detailed'" and found 3 dead region servers. I
>>was
>> > >> hoping that the dead region servers would go aways after a while
>>but
>> > >>they
>> > >> seem to exist for a long time now. Is there a way for these to be
>> > >>removed
>> > >> without restarting the master.
>> > >> Using hbase 0.90.4-cdh3u3
>> > >> Regards,
>> > >> Samar
>> > >>
>> > >> ________________________________
>> > >>
>> > >> The information contained in this communication is intended solely
>>for
>> > >>the
>> > >> use of the individual or entity to whom it is addressed and others
>> > >> authorized to receive it. It may contain confidential or legally
>> > >>privileged
>> > >> information. If you are not the intended recipient you are hereby
>> > >>notified
>> > >> that any disclosure, copying, distribution or taking any action in
>> > >>reliance
>> > >> on the contents of this information is strictly prohibited and may
>>be
>> > >> unlawful. If you have received this communication in error, please
>> > >>notify
>> > >> us immediately by responding to this email and then delete it from
>> your
>> > >> system. The firm is neither liable for the proper and complete
>> > >>transmission
>> > >> of the information contained in this communication nor for any
>>delay
>> in
>> > >>its
>> > >> receipt.
>> > >>
>> > >
>> > >
>> > >
>> > >--
>> > >Adrien Mogenet
>> > >06.59.16.64.22
>> > >http://www.mogenet.me
>> >
>> >
>> >
>>