How to integrate with Akka? about blockhound

[simonbasle]

closing inactive question

[bsideup]

Is there any way to bypass akka internal blocking calls and only focus on my actor code?

Yes, you can whitelist them, see:
https://github.com/reactor/BlockHound/blob/1.0.2.RELEASE/docs/customization.md#dis-allowing-blocking-calls-inside-methods

What does this snippet is for builder.disallowBlockingCallsInside( "akka.dispatch.MonitorableThreadFactory.AkkaForkJoinWorkerThread", "execute" );

This code says "report blocking calls that were executed from AkkaForkJoinWorkerThread#execute or down the stack (unless marked with allowBlockingCallsInside).

When the article was written, it was mandatory to mark some entry point, otherwise nothing would be reported. Starting with BlockHound's release version, there is no need to do so (I guess I need to update the article).

It is still useful to disallow certain methods, you will find some info about it in the tips:
https://github.com/reactor/BlockHound/blob/1.0.2.RELEASE/docs/tips.md#how-to-select-what-to-whitelist

[Poorva17]

I have whitelisted in above code snippet.

builder.allowBlockingCallsInside("jdk.internal.misc.Unsafe", "park");

Which did not solve my problem

May be I have chosen wrong method to whitelist. I would like to understand that from stack trace of blocking call which method I should whitelist

[bsideup]

Whitelisting Unsafe#park is not a good idea, since it is a blocking call that should be reported.
See the linked tips for recommendations on how to whitelist things.

[bsideup]

Also, in your case, it is FileInputStream#readBytes triggered from StaticLoggerBinder#<clinit>. It is a good idea to whitelist StaticLoggerBinder#<clinit>.

[gontard]

Whitelisting Unsafe#park is not a good idea, since it is a blocking call that should be reported.
See the linked tips for recommendations on how to whitelist things.

@bsideup i am also working on an Akka integration and the hard part is integrating the akka dispatcher which is a ForkJoinPool.
In some circumstances, it invokes:

• Thread.yield,
• LockSupport.parkUntil
• LockSupport.park

As you said, i wouldn't like to whiltelist Unsafe#park but how?
Do you think i should whitelist the methods ForkJoinPool#runWorker and ForkJoinPool#poll? If yes, the risk would be to white list other execution branches.