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From Till Rohrmann <trohrm...@apache.org>
Subject Re: Flink TaskManagers do not start until job is submitted in YARN
Date Mon, 24 Sep 2018 14:04:04 GMT
Hi Suraj,

at the moment Flink's new mode does not support such a behaviour. There are
plans to set a min number of running TaskManagers which won't be released.
But no work has been done in this direction yet, afaik. If you want, then
you can help the community with this effort.

Cheers,
Till

On Mon, Sep 24, 2018 at 3:07 PM Dawid Wysakowicz <dwysakowicz@apache.org>
wrote:

> Hi Suraj,
>
> As far as I know this was changed with FLIP-6 to allow dynamic resource
> allocation.
>
> Till, cced might know if there is a switch to restore old behavior or
> are there plans to support it.
>
> Best,
>
> Dawid
>
> On 24/09/18 12:24, suraj7 wrote:
> > Hi,
> >
> > I am using Amazon EMR to run Flink Cluster on YARN. My setup consists of
> > m4.large instances for 1 master and 2 core nodes. I have started the
> Flink
> > Cluster on YARN with the command: flink-yarn-session -n 2 -d -tm 4096 -s
> 4.
> >
> > Flink Job Manager and Application Manager starts but there are no Task
> > Managers running. The Flink Web interface shows 0 for task managers, task
> > slots and slots available. However when I submit a job to flink cluster,
> > then Task Managers get allocated and the job runs and the Web UI shows
> > correct values as expected and goes back to 0 once the job is complete.
> >
> > I would like Task Managers to be running even when no Job is submitted
> as I
> > want to use Flink's REST API to monitor and modify parallelism based on
> the
> > available slots value while scaling Core Nodes.
> >
> > Is there a configuration that I've missed which prevents Task Managers
> from
> > running all the time?
> >
> > Thanks,
> > Suraj
> >
> >
> >
> > --
> > Sent from:
> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/
>
>
>

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