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Subject: Re: rebalance of streaming job after taskManager restart
From: Aljoscha Krettek <aljoscha@apache.org>
In-Reply-To: <56DEE640.3010001@touk.pl>
Date: Tue, 8 Mar 2016 16:03:36 +0100
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Message-Id: <0288CD13-415C-44C6-B319-C543AC7DC781@apache.org>
References: <56DEE640.3010001@touk.pl>
To: user@flink.apache.org
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Hi,
I think what you can do is make a savepoint of your program, then cancel =
it and restart it from the savepoint. This should make Flink =
redistribute it on all TaskManagers.

See =
https://ci.apache.org/projects/flink/flink-docs-master/apis/streaming/save=
points.html
and
=
https://ci.apache.org/projects/flink/flink-docs-master/apis/cli.html#savep=
oints
for documentation about savepoints.

The steps to follow should be:
=20
bin/flink savepoint <your job id>

this will print a savepoint path that you will need later.
=20
bin/flink cancel <your job id>

bin/flink run -s <savepoint path> =E2=80=A6

The last command is your usual run command but with the additional =
=E2=80=9C-s=E2=80=9D parameter to continue from a savepoint.

I hope that helps.

Cheers,
Aljoscha
> On 08 Mar 2016, at 15:48, Maciek Pr=C3=B3chniak <mpr@touk.pl> wrote:
>=20
> Hi,
>=20
> we have streaming job with paralelism 2 and two task managers. The job =
is occupying one slot on each task manager. When I stop manager2 the job =
is restarted and it runs on manager1 - occupying two of it's slots.
> How can I trigger restart (or other similar process) that will cause =
the job to be balanced among task managers?
>=20
> thanks,
> maciek