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spring-bootthreadpooldefault-value

spring boot how to see thread pool size default value

I have a spring boot application using @EnabledAsync and @Async annotations, not defining any thread pool and taking the default values.

Cheking some metrics on Grafana, it seems thread count never stop increasing and EC2 instance eventually crashes.

I know I could define thread pool size and all those values but first I'd like to know what values spring boot is using. Is there a way to see them from the code? like getThreafPoolSize() or something like that?

I tried with debug=true in property file but I couldn't see those values. Any idea?

Solution

  • You can find the default behavior in the ThreadPoolTaskExecutor class of the Spring Framework.

    The maximum thread pool size within the class is defined as follows.

    private int corePoolSize = 1;

private int maxPoolSize = Integer.MAX_VALUE;

private int keepAliveSeconds = 60;

    ThreadPoolTaskExecutor details can be found here.