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javathreadpoolhystrix
Manikandan
Manikandan

Reputation: 83

How hystrix creates their thread pool

My application is running in Websphere Application server. And I'm using Hystrix for some external service calls. The WAS server has a thread pool configuration, say a max thread pool size of 10 and the HystrixThreadPoolProperties maxCoreSize is set to 5.

I'm wondering how the threads are managed by hystrix. Does hystrix consumes 5 threads from the WAS server thread pool or will it create its own thread pool with 5 new threads which will result in a total of 15 threads.

In my case, I would want the hystrix to consume the threads from the WAS thread pool rather than creating new threads. Please advice.

Thanks in advance.

Upvotes: 1

Views: 1467

Answers (1)

Ondro Mihályi
Ondro Mihályi

Reputation: 7710

Hystrix, as all general purpose libraries, manages a thread pool on it’s own, but provides a way to plug in a custom thread pool or executor.

In order to integrate Hystrix with a JavaEE server like WAS, you need to provide a concurrency strategy, which uses a managed executor to provide threads. In most JavaEE servers (I'm pretty sure that also in WAS), thread pool for a managed executor is different from the one used by HTTP threads by default - you still need to configure them separately or point both to use the same threadpool if the server supports it.

Upvotes: 2

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