[BUG] OutOfMemoryError in JSON.parseArray

[Cooper-Zhong]

问题描述

以下代码使用fastjson2和fastjson 1.2.83会抛出异常，使用fastjson 2.0.50 会导致内存溢出。

环境信息

• OS信息： [MacOS 12.7.4 M1 Pro 16 GB]
• JDK信息： [Openjdk 17.0.6]
• 版本信息：[Fastjson 2.0.50]

重现步骤

import com.alibaba.fastjson2.JSON;
import org.junit.jupiter.api.Test;
import java.util.List;


public class Issue1184Mutated_547 {
    @Test
    public void test() {
        final String source = "[{\"code\":\"face_1\",\"disc\":\"人脸\"}]";
        List<VerifyDevice> devices = JSON.parseArray(source, VerifyDevice.class);
    }

    @Test
    public void test_fj() {
        final String source = "[{\"code\":\"face_1\",\"disc\":\"人脸\"}]";
        List<VerifyDevice> devices = com.alibaba.fastjson.JSON.parseArray(source, VerifyDevice.class);
    }

    public enum VerifyDevice {
        FACE_DETECT("face_1", "人脸"),
        IC_CARD("ic_2", "IC卡");

        private final String code;
        private final String disc;

        VerifyDevice(String code, String disc) {
            this.code = code;
            this.disc = disc;
        }

        public String getCode() {
            return code;
        }

        public String getDisc() {
            return disc;
        }
    }

}

相关日志输出

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.base/java.util.Arrays.copyOf(Arrays.java:3512)
at java.base/java.util.Arrays.copyOf(Arrays.java:3481)
at java.base/java.util.ArrayList.grow(ArrayList.java:237)
at java.base/java.util.ArrayList.grow(ArrayList.java:244)
at java.base/java.util.ArrayList.add(ArrayList.java:454)
at java.base/java.util.ArrayList.add(ArrayList.java:467)
at com.alibaba.fastjson2.reader.ObjectReaderImplList.readObject(ObjectReaderImplList.java:643)
at com.alibaba.fastjson2.JSONReader.read(JSONReader.java:1803)
at com.alibaba.fastjson.JSON.parseArray(JSON.java:2042)
at Issue1184Mutated_547.test_fj(Issue1184Mutated_547.java:19)