Telling if a job has caught up with Kafka

Posted by Gyula Fóra-2 on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/Telling-if-a-job-has-caught-up-with-Kafka-tp12261.html

Hi All,

I am wondering if anyone has some nice suggestions on what would be the simplest/best way of telling if a job is caught up with the Kafka input.

An alternative question would be how to tell if a job is caught up to another job reading from the same topic.

The first thing that comes to my mind is looking at the offsets Flink commits to Kafka. However this will only work if every job uses a different group id and even then it is not very reliable depending on the commit frequency.

The use case I am trying to solve is fault tolerant update of a job, by taking a savepoint for job1 starting job2 from the savepoint, waiting until it catches up and then killing job1.

Thanks for your input!

Gyula