alibaba / alibaba/fastjson2

[BUG] 2.0.57 类似com.alibaba.fastjson2.writer.OWG_20180_7_Filtering的动态类持续增长,导致metaspace OOM

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bug
Dominant language
Java
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Description

### 问题描述
*简要描述您碰到的问题。*

### 环境信息
*请填写以下信息:*

- OS信息: [e.g.:CentOS 8.4.2105 4Core 3.10GHz 16 GB]
- JDK信息: [e.g.:Openjdk 11.0.0]
- 版本信息:[e.g.:Fastjson2 2.0.57]

### 重现步骤
*如何操作可以重现该问题:*

1. 使用 `xxx.xxx` 方法
2. 输入 `...` 数据
3. 出现 `...` 错误
```java
//可在此输入示例代码
```

### 期待的正确结果
*对您期望发生的结果进行清晰简洁的描述。*

### 相关日志输出
*请复制并粘贴任何相关的日志输出。*

#### 附加信息
*如果你还有其他需要提供的信息,可以在这里填写(可以提供截图、视频等)。*

Contributor guide

Open the contributing guide

Research direction

Start by reproducing the reported Fastjson2 2.0.57 behavior with the missing OS, JDK, method, input, logs, and sample code filled in. Investigate the dynamic class named com.alibaba.fastjson2.writer.OWG_20180_7_Filtering and verify whether repeated growth leads to Metaspace OOM. Done means the reproduction, cause, and expected behavior are documented.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
backend, performance
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
15/100

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