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Posted to user@impala.apache.org by Antoni Ivanov <ai...@vmware.com> on 2017/04/18 17:08:25 UTC
Safe Restart for Impala Deamon
Hi,
I think right now if you want to restart Impala Deamon - all queries on this daemon executing on this node (either as fragments or coordinators) fail. Right?
Is there a way (or do you plan) to have safe-restart option?
It probably just needs to de-register from statestored (maybe it's safe) also there's 'impala-server.ready' option which can be marked as false and wait til all fragments/queries have finished (or times out) and then stops.
Re: Safe Restart for Impala Deamon
Posted by Jim Apple <jb...@cloudera.com>.
This is a very large task. I think getting consensus on the design and
implementation will be very hard for someone new to the codebase and
community. I encourage you to pick up other tickets marked "newbie" first
and get to know your way around.
On Tue, Apr 18, 2017 at 6:50 PM, yu feng <ol...@gmail.com> wrote:
> Hi, I am Newly join to Impala community, If no-one is actually working on
> this task, maybe I can try to make some contribution about it.
>
> 2017-04-19 1:12 GMT+08:00 Henry Robinson <he...@cloudera.com>:
>
>>
>>
>> On 18 April 2017 at 10:08, Antoni Ivanov <ai...@vmware.com> wrote:
>>
>>> Hi,
>>>
>>> I think right now if you want to restart Impala Deamon - all queries on
>>> this daemon executing on this node (either as fragments or coordinators)
>>> fail. Right?
>>> Is there a way (or do you plan) to have safe-restart option?
>>>
>>> It probably just needs to de-register from statestored (maybe it's safe)
>>> also there's 'impala-server.ready' option which can be marked as false and
>>> wait til all fragments/queries have finished (or times out) and then stops.
>>>
>>
>> Right, that's basically what you need to do. See
>> https://issues.apache.org/jira/browse/IMPALA-1760. I don't think anyone
>> is actively working on it right now.
>>
>> Henry
>>
>>
>
Re: Safe Restart for Impala Deamon
Posted by Jim Apple <jb...@cloudera.com>.
This is a very large task. I think getting consensus on the design and
implementation will be very hard for someone new to the codebase and
community. I encourage you to pick up other tickets marked "newbie" first
and get to know your way around.
On Tue, Apr 18, 2017 at 6:50 PM, yu feng <ol...@gmail.com> wrote:
> Hi, I am Newly join to Impala community, If no-one is actually working on
> this task, maybe I can try to make some contribution about it.
>
> 2017-04-19 1:12 GMT+08:00 Henry Robinson <he...@cloudera.com>:
>
>>
>>
>> On 18 April 2017 at 10:08, Antoni Ivanov <ai...@vmware.com> wrote:
>>
>>> Hi,
>>>
>>> I think right now if you want to restart Impala Deamon - all queries on
>>> this daemon executing on this node (either as fragments or coordinators)
>>> fail. Right?
>>> Is there a way (or do you plan) to have safe-restart option?
>>>
>>> It probably just needs to de-register from statestored (maybe it's safe)
>>> also there's 'impala-server.ready' option which can be marked as false and
>>> wait til all fragments/queries have finished (or times out) and then stops.
>>>
>>
>> Right, that's basically what you need to do. See
>> https://issues.apache.org/jira/browse/IMPALA-1760. I don't think anyone
>> is actively working on it right now.
>>
>> Henry
>>
>>
>
Re: Safe Restart for Impala Deamon
Posted by yu feng <ol...@gmail.com>.
Hi, I am Newly join to Impala community, If no-one is actually working on
this task, maybe I can try to make some contribution about it.
2017-04-19 1:12 GMT+08:00 Henry Robinson <he...@cloudera.com>:
>
>
> On 18 April 2017 at 10:08, Antoni Ivanov <ai...@vmware.com> wrote:
>
>> Hi,
>>
>> I think right now if you want to restart Impala Deamon - all queries on
>> this daemon executing on this node (either as fragments or coordinators)
>> fail. Right?
>> Is there a way (or do you plan) to have safe-restart option?
>>
>> It probably just needs to de-register from statestored (maybe it's safe)
>> also there's 'impala-server.ready' option which can be marked as false and
>> wait til all fragments/queries have finished (or times out) and then stops.
>>
>
> Right, that's basically what you need to do. See
> https://issues.apache.org/jira/browse/IMPALA-1760. I don't think anyone
> is actively working on it right now.
>
> Henry
>
>
Re: Safe Restart for Impala Deamon
Posted by Henry Robinson <he...@cloudera.com>.
On 18 April 2017 at 10:08, Antoni Ivanov <ai...@vmware.com> wrote:
> Hi,
>
> I think right now if you want to restart Impala Deamon - all queries on
> this daemon executing on this node (either as fragments or coordinators)
> fail. Right?
> Is there a way (or do you plan) to have safe-restart option?
>
> It probably just needs to de-register from statestored (maybe it's safe)
> also there's 'impala-server.ready' option which can be marked as false and
> wait til all fragments/queries have finished (or times out) and then stops.
>
Right, that's basically what you need to do. See
https://issues.apache.org/jira/browse/IMPALA-1760. I don't think anyone is
actively working on it right now.
Henry