Default chaining & uid

[Emily McMahon <em...@remitly.com>]

Does setting uid affect the default chaining (ie if I have two maps in a
row and set uid on both)?

This
<http://doc.flink-china.org/1.2.0/ops/upgrading.html#application-topology>
makes me think there's no effect

All operators that are part of a chain should be assigned an ID as
> described in the Matching Operator State
> <http://doc.flink-china.org/1.2.0/ops/upgrading.html#Matching Operator
> State> section above.



Thanks,
Emily

Re: Default chaining & uid

[Chesnay Schepler <ch...@apache.org>]

Hello,

That depends a bit on the used version.

For 1.3 and above it does not affect chaining; the maps will be chained 
and setting the UIDs will work as if the maps weren't chained.

For 1.2, setting the UID on a chained operator is forbidden and will 
fail with an exception.

On 28.08.2017 21:57, Emily McMahon wrote:
> Does setting uid affect the default chaining (ie if I have two maps in 
> a row and set uid on both)?
>
> This 
> <http://doc.flink-china.org/1.2.0/ops/upgrading.html#application-topology> 
> makes me think there's no effect
>
>     All operators that are part of a chain should be assigned an ID as
>     described in the Matching Operator State
>     <http://doc.flink-china.org/1.2.0/ops/upgrading.html#Matching%20Operator%20State> section
>     above.
>
>
>
> Thanks,
> Emily