With Flink 1.9 is state TTL supported for event-time characteristics? This part <https://ci.apache.org/projects/flink/flink-docs-release-1.9/dev/stream/state/state.html#state-time-to-live-ttl> of the documentation says that
- Only TTLs in reference to *processing time* are currently supported. Does this mean if a program uses event-time characteristics with stateful operators, it can not use TTL ?? Also clean up section <https://ci.apache.org/projects/flink/flink-docs-release-1.9/dev/stream/state/state.html#cleanup-of-expired-state> of the documentation says state values that are never read will never be cleared. [image: Screenshot 2020-06-17 at 5.00.41 PM.png] The question is, when processing a stream with unique elements or keys why would Flink framework expect the same key to be read in order for it to be removed after its expiration time ? Why does it not simply clean up the value for that key based on timers automatically without waiting for read operation from user code? Thanks Arti
