Java 代码OOM内存溢出检查

编写OOM程序

package com.example.demo;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.ArrayList;

@RestController
public class TestController {
@GetMapping("/hello")
public void c_() throws InterruptedException {
System.out.println("你好");
Integer K = 1024000000;

ArrayList<byte[]> list = new ArrayList<>();
int i = 0;
while (true) {
Thread.sleep(50);
list.add(new byte[5 * 1024 * 1024]);
System.out.println("分配次数" + (++i));
}
}


}

启动类 , 名字瞎起的,不要在意细节

package com;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Demo1111Application {

public static void main(String[] args) {
SpringApplication.run(Demo1111Application.class, args);
}


}

启动SpringBoot项目

使用Java VisualVM工具监视监控JVM情况

开始访问接口,等待OOM异常

​​http://localhost:8080//hello​​

打开dump文件

OOM情况

这里还显示在Java代码的哪行