Apache Flink

Hi.
Are Flink's timer service &amp; Collector thread-safe?
Async operation &amp; Future callback was added as the State API was upgraded to v2. Will it be thread-safe to call the Timer service &amp; Collector from that callback?

*Example*
```final var stateFuture = state.asyncValue();
stateFuture.thenAccept(value -&gt; {
    ctx.timerService().registerEventTimeTimer(timestamp + someValue);
    out.collect(foo(value));
});```

All the callbacks are run in the same thread, so it's safe

Thank you for your help!
Can I see the relevant document?

Here you go <https://nightlies.apache.org/flink/flink-docs-release-2.0/docs/dev/datastream/fault-tolerance/state_v2/#execution-order>

"Although the state access methods are executed out of order, this not mean that all the user code are run in parallel. The user code in the `processElement`, `flatMap` or `thenXXxx` methods following the state access methods will be executed in a single thread (the task thread). So there is no concurrency issue for the user code."

Oh! Very thanks for your help!!!
It resolved!