Activate Flink HA without checkpoints on k8S

[marco andreas <ma...@gmail.com>]

Hello,

Can someone explain to me what is the point of using HA when deploying an
application cluster with a single JM and the checkpoints are not activated.

AFAK when the pod of the JM goes down kubernetes will restart it anyway so
we don't need to activate the HA in this case.

Maybe there's something else that I am missing here, so if someone could
give me an explanation it would be great .

Sincerely,

Re: Activate Flink HA without checkpoints on k8S

[Yang Wang <da...@gmail.com>]

Add some more information to Gyula's comment.

For application mode without checkpoint, you do not need to activate the HA
since it will not take any effect and the Flink job will be submitted again
after the JobManager restarted. Because the job submission happens on the
JobManager side.

For session mode without checkpoint, you still need to activate the HA. If
not, all the running jobs will be lost after JobManager restarted. Because
the
job submission happens on the client side and job graphs are stored by HA.

Best,
Yang

Gyula Fóra <gy...@gmail.com> 于2022年10月14日周五 04:27写道：

> Without HA, if the jobmanager goes down, job information is lost so the
> job won’t be restarted after the JM comes back up.
>
> Gyula
>
> On Thu, 13 Oct 2022 at 19:07, marco andreas <ma...@gmail.com>
> wrote:
>
>>
>>
>> Hello,
>>
>> Can someone explain to me what is the point of using HA when deploying an
>> application cluster with a single JM and the checkpoints are not activated.
>>
>> AFAK when the pod of the JM goes down kubernetes will restart it anyway
>> so we don't need to activate the HA in this case.
>>
>> Maybe there's something else that I am missing here, so if someone could
>> give me an explanation it would be great .
>>
>> Sincerely,
>>
>

Re: Activate Flink HA without checkpoints on k8S

[Gyula Fóra <gy...@gmail.com>]

Without HA, if the jobmanager goes down, job information is lost so the job
won’t be restarted after the JM comes back up.

Gyula

On Thu, 13 Oct 2022 at 19:07, marco andreas <ma...@gmail.com>
wrote:

>
>
> Hello,
>
> Can someone explain to me what is the point of using HA when deploying an
> application cluster with a single JM and the checkpoints are not activated.
>
> AFAK when the pod of the JM goes down kubernetes will restart it anyway so
> we don't need to activate the HA in this case.
>
> Maybe there's something else that I am missing here, so if someone could
> give me an explanation it would be great .
>
> Sincerely,
>