Using JMX to monitor asyncTaskExecutor

You can monitor your taskExecutor by using spring jmx.

- Config file

package org.blog.test;

import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.jmx.export.MBeanExporter;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.HashMap;
import java.util.Map;

@SpringBootApplication
@Slf4j
public class JmxApplication {
    public static void main(String[] args) {
        SpringApplication.run(JmxApplication.class, args);
    }

    @Bean
    public ThreadPoolTaskExecutor threadPoolTaskExecutor() {
        return new ThreadPoolTaskExecutor() {{
            setCorePoolSize(2);
            setMaxPoolSize(5);
            setQueueCapacity(10);
            initialize();
        }};
    }

    @Bean
    public MBeanExporter myMbeanExporter() {
        return new MBeanExporter() {{
            Map beans = new HashMap<>();
            beans.put("org.blog.test:name=threadPoolTaskExecutor", threadPoolTaskExecutor().getThreadPoolExecutor());
            setBeans(beans);
        }};
    }
}

You can declare the bean as MBeanExporter, and then register threadPoolTaskExecutor as one of beans.
By using jconsole in JAVA_HOME/bin/jconsole, you can monitor your jvm application.
You can find the declared Mbean in Mbean tab.