在OutOfMemory时生成java转储 [英] Generate java dump when OutOfMemory

问题描述

我有一个程序最终应该生成 OutOfMemory 。
程序代码是：

I have a program that should eventually generate OutOfMemory . The program code is:

public class VeryLargeObject implements Serializable {
    public static final int SIZE = 1 << 12;

    public String tag;
    public int[][] bigOne = new int[SIZE][SIZE];

    {
        // Initialize bigOne
        for(int i = 0; i < SIZE ; ++i) {
            for(int j = 0; j < SIZE; ++j) {
                bigOne[i][j] = (int) (Math.random() * 100);
            }
        }
    }

    public VeryLargeObject(String tag) {
        this.tag = tag;
    }

    public static void main(String args[]) {
        VeryLargeObject[] vla = new VeryLargeObject[1 << 12];
        for(int i = 0; i < Integer.MAX_VALUE; ++i) {
            vla[i] = new VeryLargeObject("aa");
        }
    }
}

我运行程序以下参数：

java VeryLargeObject -Xms1024m -Xmx1024m -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath="D:\workspace"

程序因OutOfMemory失败，但没有生成转储文件。你知道为什么吗？

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
        at VeryLargeObject.<init>(VeryLargeObject.java:14)
        at VeryLargeObject.main(VeryLargeObject.java:32)

推荐答案

首先删除XX选项和任何选项 BEFORE VeryLargeObject ，否则你将参数传递给java程序而不是JVM

For starter drop the XX options and any options BEFORE VeryLargeObject, otherwise you pass the parameters to the java program and not the JVM

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