使用jvisualvm排查内存泄漏

1.先准备一个可以出现内存溢出的代码

package test;

import java.util.ArrayList;

public class TestOOMA {

    static class OOMObject{
        private String content;
        
        public  OOMObject(String content){
            this.content = content;
        }
        
        
    }
    
    public static void main(String[] args) throws InterruptedException {
        ArrayList<OOMObject> list = new ArrayList<OOMObject>();
        Thread.sleep(30000);
        int a =1;
                
        while(true){
            list.add(new OOMObject(String.valueOf(a++)));
        }
    }
}

2.添加配置

-Xms2m -Xmx4m -XX:+HeapDumpOnOutOfMemoryError 

3.内存泄漏,堆栈信息被导入到执行文件

java.lang.OutOfMemoryError: Java heap space
Dumping heap to java_pid14584.hprof ...
Heap dump file created [7162080 bytes in 0.088 secs]
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at java.lang.Integer.toString(Integer.java:401)
    at java.lang.String.valueOf(String.java:3099)
    at test.TestOOMA.main(TestOOMA.java:23)

4.将java_pid14584.hprof文件导入到jvisualvm

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5.查看内存溢出线程

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