BlockHound detects kotlinx.coroutines.reactive.ReactiveFlowKt#<clinit> during Mono.awaitFirst()

[okue]

I'm using BlockHound integration defined in kotlinx-coroutines-debug with reactor.

Problem

When the code Mono#awaitFirst() is executed, BlockHound detected blocking call here:
https://github.com/Kotlin/kotlinx.coroutines/blob/1.3.8/reactive/kotlinx-coroutines-reactive/src/ReactiveFlow.kt#L145

This detection occurs only once or twice after starting my application.
After contextInjector variable is initialized, this detection is not warned any more.

Every time we start the application, BlockHound detects and outputs warning messages, which sounds a little noisy.

versions:

• Kotlin: 1.3.72
• kotlinx.coroutines: 1.3.8
• BlockHound: 1.0.4

Workaround

We can suppress this blocking call.

BlockHound.builder()
    .with(CoroutinesBlockHoundIntegration())
    .allowBlockingCallsInside(
        "kotlinx.coroutines.reactive.ReactiveFlowKt", "<clinit>"
    )

Question

Does BlockHound integration of kotlinx-coroutines-debug have a plan to suppress this kind of warning?

[qwwdfsad]

Thanks for the report! Suppressing is probably the best option here

[okue]

Thanks!

[okue]

#2331 resolves this issue.
Thanks @dkhalanskyjb.