What is the status used for?

[Rui Zhang <rz...@vertica.com>]

Hi,

I have commented out the status code in the python agents. But the 
status action will always lead to a failure after a couple of of IN 
PROGRESS.

What does the status used for? How can I avoid the failure?

Thanks,

-- 
Rui Zhang
Software engineer Intern
Vertica, an HP Company
rzhang@vertica.com

Re: What is the status used for?

[Steve Loughran <st...@hortonworks.com>]

if you have a pid, then kill -0 $PID will verify that the process is there;
returning 0 on success, 1 on failure.

it doesn't handle pid recycling though


On 24 July 2014 00:07, Sumit Mohanty <su...@gmail.com> wrote:

> status() is checked at certain intervals to check if the daemon started is
> up. The scenario being "slider-agent" is a process that starts your daemon
> - e.g. HBASE_REGIONSERVER. For example, you can use the PID of the daemon
> you started to see if the daemon is still running. So if a daemon goes down
> then the agent can kill itself.
>
> Rather than commenting out status you can have it not return any error in
> which case agent will always think that the daemon is up and running. For
> testing its OK but for production you need to implement status so that
> agent can take corrective actions if the daemon is not up. We are adding
> some library capability that status() can be made to monitor the PID of the
> daemon by default.
>
>
> On Wed, Jul 23, 2014 at 3:40 PM, Rui Zhang <rz...@vertica.com> wrote:
>
> > I have checked the agent.log. It is not a failure of Status. It's a
> > failure when start each role. But they actually have started normally
> > without any error.
> >
> >
> >
> > On 07/23/2014 06:13 PM, Rui Zhang wrote:
> >
> >> And actually my application has already been started and runs perfectly.
> >>
> >> On 07/23/2014 06:02 PM, Rui Zhang wrote:
> >>
> >>> Hi,
> >>>
> >>> I have commented out the status code in the python agents. But the
> >>> status action will always lead to a failure after a couple of of IN
> >>> PROGRESS.
> >>>
> >>> What does the status used for? How can I avoid the failure?
> >>>
> >>> Thanks,
> >>>
> >>>
> >>
> > --
> > Rui Zhang
> > Software engineer Intern
> > Vertica, an HP Company
> > rzhang@vertica.com
> >
> >
>
>
> --
> thanks
> Sumit
>

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Re: What is the status used for?

[Sumit Mohanty <su...@gmail.com>]

status() is checked at certain intervals to check if the daemon started is
up. The scenario being "slider-agent" is a process that starts your daemon
- e.g. HBASE_REGIONSERVER. For example, you can use the PID of the daemon
you started to see if the daemon is still running. So if a daemon goes down
then the agent can kill itself.

Rather than commenting out status you can have it not return any error in
which case agent will always think that the daemon is up and running. For
testing its OK but for production you need to implement status so that
agent can take corrective actions if the daemon is not up. We are adding
some library capability that status() can be made to monitor the PID of the
daemon by default.


On Wed, Jul 23, 2014 at 3:40 PM, Rui Zhang <rz...@vertica.com> wrote:

> I have checked the agent.log. It is not a failure of Status. It's a
> failure when start each role. But they actually have started normally
> without any error.
>
>
>
> On 07/23/2014 06:13 PM, Rui Zhang wrote:
>
>> And actually my application has already been started and runs perfectly.
>>
>> On 07/23/2014 06:02 PM, Rui Zhang wrote:
>>
>>> Hi,
>>>
>>> I have commented out the status code in the python agents. But the
>>> status action will always lead to a failure after a couple of of IN
>>> PROGRESS.
>>>
>>> What does the status used for? How can I avoid the failure?
>>>
>>> Thanks,
>>>
>>>
>>
> --
> Rui Zhang
> Software engineer Intern
> Vertica, an HP Company
> rzhang@vertica.com
>
>


-- 
thanks
Sumit

Re: What is the status used for?

[Rui Zhang <rz...@vertica.com>]

I have checked the agent.log. It is not a failure of Status. It's a 
failure when start each role. But they actually have started normally 
without any error.


On 07/23/2014 06:13 PM, Rui Zhang wrote:
> And actually my application has already been started and runs perfectly.
>
> On 07/23/2014 06:02 PM, Rui Zhang wrote:
>> Hi,
>>
>> I have commented out the status code in the python agents. But the 
>> status action will always lead to a failure after a couple of of IN 
>> PROGRESS.
>>
>> What does the status used for? How can I avoid the failure?
>>
>> Thanks,
>>
>

-- 
Rui Zhang
Software engineer Intern
Vertica, an HP Company
rzhang@vertica.com

Re: What is the status used for?

[Rui Zhang <rz...@vertica.com>]

And actually my application has already been started and runs perfectly.

On 07/23/2014 06:02 PM, Rui Zhang wrote:
> Hi,
>
> I have commented out the status code in the python agents. But the 
> status action will always lead to a failure after a couple of of IN 
> PROGRESS.
>
> What does the status used for? How can I avoid the failure?
>
> Thanks,
>

-- 
Rui Zhang
Software engineer Intern
Vertica, an HP Company
rzhang@vertica.com