The state won't exist in the snapshot.

On 17.08.2018 04:38, Tony Wei wrote:
Hi all,

I'm confused about the description in documentation. [1]

  • Removing a stateful operator: The state of the removed operator is lost unless
    another operator takes it over. When starting the upgraded application, you have
    to explicitly agree to discard the state.
Does that mean if I take a full snapshot (e.g. savepoint) after restoring by explicitly agreeing to
discard the state, then the state won't exist in that snapshot? Or does it just mean ignore the
state but the state still exist forever, unless I explicitly purge that state by using state operator?

And could this behavior differ between different state backend (Memory, FS, RocksDB) ?

Many thanks,
Tony Wei

[1] https://ci.apache.org/projects/flink/flink-docs-master/ops/upgrading.html#application-topology