[alibaba/arthas]watch命令 :入参和监听到的结果有ArrayList 报StackOverflowError

有没有可能对象里面循环引用导致的，对象a里有对象b，对象b里面又有对象a

检查下list里的对象，可能这些对象本身转换为json就会StackOverflowError

这个检查过了，用fastjson是不会出现这个问题的，并且不仅仅是一个接口有这种情况，我用到的所有的涉及到list的都会报这个错误

检查过了，是没有的

检查 ~/logs/arthas/arthas.log

看了下日志是栈溢出：我尝试debug然后用json打印一下看看，然后你们用的json版本是哪个？我用你们的版本试试 2021-08-31 00:53:12 [catalina-exec-40] ERROR c.taobao.arthas.core.view.ObjectView -ObjectView draw error, object class: class java.util.ArrayList java.lang.StackOverflowError: null at com.alibaba.fastjson.serializer.SerializeWriter.writeStringWithDoubleQuote(SerializeWriter.java:832) at com.alibaba.fastjson.serializer.SerializeWriter.writeString(SerializeWriter.java:2185) at com.alibaba.fastjson.serializer.MiscCodec.write(MiscCodec.java:166) at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:318) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:470) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:149) at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:318) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:470) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:149) at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:318) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:470) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:149) at com.alibaba.fastjson.serializer.ListSerializer.write(ListSerializer.java:135) at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:318) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:470) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:149) at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:318) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:470) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:149) at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:318) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:470) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:149) at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:318) at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:470) ...

https://github.com/alibaba/arthas/blob/master/CONTRIBUTING.md#%E5%BC%80%E5%8F%91%E8%80%85%E7%9B%B8%E5%85%B3

我远程debug然后获取入参数中的list参数，使用JSON.toJSONString() 方法进行序列化是成功的。

arthas中使用的toJSONString传入的对象是JSON ，前面应该是还包了其他对象吧，需要怎么排查呢？ at com.alibaba.fastjson.JSON.toJSONString(JSON.java:687) at com.alibaba.fastjson.JSON.toJSONString(JSON.java:676) at com.taobao.arthas.core.view.ObjectView.draw(ObjectView.java:45)

watch命令默认打印的是{params, target, returnObj}， 可以测试下不同的参数。