Hi, in general it should not be a problem if one parallel instance of a sink is responsible for several Kafka partitions. It can become a problem if the timestamps in the different partitions differ by a lot and the watermark assignment logic is not able to handle this.
How are you assigning the timestamps/watermarks in your job? Cheers, Aljoscha > On 08 Feb 2016, at 21:51, shikhar <shik...@schmizz.net> wrote: > > Stephan explained in that thread that we're picking the min watermark when > doing operations that join streams from multiple sources. If we have m:n > partition-source assignment where m>n, the source is going to end up with > the max watermark. Having m<=n ensures that the lowest watermark is used. > > Re: automatic enforcement, perhaps allowing for more than 1 Kafka partition > on a source should require opt-in, e.g. allowOversubscription() > > > > -- > View this message in context: > http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Kafka-partition-alignment-for-event-time-tp4782p4788.html > Sent from the Apache Flink User Mailing List archive. mailing list archive at > Nabble.com.
