Vertx Circuit breaker with timeout - cancel future if not processed in time

[AndWlf]

Hi,

I have a specific situation in my project that would require to have the ability to cancel the work of a worker-thread after a given time.

Depending on the user input, the processing takes very long. Given that the backend should give an answer in a specified amount of time, I will answer the client with an error (using eventBus  replyHandler). Meanwhile, the worker thread will continue working on the complex input for a long time, consuming resources to produce an output that will not be used.

I tried using vertx-circuit-breaker (3.3.3 and 3.4.0) with a timeout. The timer is fired (early in a multi-threading setup), the operation is counted as failed, but the processing of the future is not canceled.

Is there any way to stop a worker-thread to do work that is no longer needed?

Thanks!

[Jez P]

It's pretty much impossible to guarantee killing a thread. Not a vert.x limitation, but fundamentally a Java one. This came up recently on the forum. If you can make your processing interruptible, maybe you could have your own signal to the thread to interrupt your processing. 

[Jez P]

This thread has previous discussion on the topic:-

https://groups.google.com/forum/#!msg/vertx/byh_qr6a6_s/X1M4cBAkBQAJ;context-place=forum/vertx

[AndWlf]

Thanks. I didn't come around that topic before.