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[BUG] java.util.ConcurrentModificationException #2358
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https://oss.sonatype.org/content/repositories/snapshots/com/alibaba/fastjson2/fastjson2/2.0.48-SNAPSHOT/ 问题已修复,请帮忙用2.0.48-SNAPSHOT验证,2.0.48正式版本预计在月末发布 |
wenshao
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Mar 21, 2024
再次验证没有出现该问题。但是有点疑问,在没有自定义配置的情况下吗,JSONFactory和ObjectReaderProvider这个应该是只会存在一个的,没有调用register和unregister方法为什么modules会变了? |
我也很奇怪,我知道这样可以解问题,但没想明白原因 |
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问题描述
分析是List modules更改了。
只有多处地方调用了 JSON.parseObject同一个类,怀疑跟类加载器不一致相关。
代码片段,在多线程的环境下执行偶现ConcurrentModificationException。
Utils.useFunctionClassLoader();
T val = (T) JSON.parseObject(new String(bytes, StandardCharsets.UTF_8), this.type,
JSONReader.Feature.SupportAutoType, JSONReader.Feature.SupportClassForName);
Utils.useInstanceClassLoader();
return val;
报错堆栈信息。
java.util.ConcurrentModificationException
at java.base/java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.base/java.util.ArrayList$Itr.next(Unknown Source)
at com.alibaba.fastjson2.reader.ObjectReaderProvider.getFieldInfo(ObjectReaderProvider.java:675)
at com.alibaba.fastjson2.reader.ObjectReaderCreator.createFieldReader(ObjectReaderCreator.java:1234)
at com.alibaba.fastjson2.reader.ObjectReaderCreator.lambda$createFieldReaders$3(ObjectReaderCreator.java:1555)
at com.alibaba.fastjson2.util.BeanUtils.declaredFields(BeanUtils.java:307)
at com.alibaba.fastjson2.util.BeanUtils.declaredFields(BeanUtils.java:242)
at com.alibaba.fastjson2.reader.ObjectReaderCreator.createFieldReaders(ObjectReaderCreator.java:1549)
at com.alibaba.fastjson2.reader.ObjectReaderCreatorASM.createObjectReader(ObjectReaderCreatorASM.java:259)
at com.alibaba.fastjson2.reader.ObjectReaderProvider.getObjectReaderInternal(ObjectReaderProvider.java:854)
at com.alibaba.fastjson2.reader.ObjectReaderProvider.getObjectReader(ObjectReaderProvider.java:746)
at com.alibaba.fastjson2.JSONReader.getObjectReader(JSONReader.java:480)
at com.alibaba.fastjson2.reader.FieldReaderObject.getObjectReader(FieldReaderObject.java:70)
at com.alibaba.fastjson2.reader.ORG_6_3_JeDraftTransferVO.readObject(Unknown Source)
at com.alibaba.fastjson2.reader.ORG_3_9_JeDraftMsgVO.readObject(Unknown Source)
at com.alibaba.fastjson2.JSON.parseObject(JSON.java:1002)
at com.huawei.dff.functions.runtime.serde.MsgpackSerDe.deserialize(MsgpackSerDe.java:33)
at com.huawei.dff.functions.runtime.serde.SerDeInstanceUtils.deserializeMessage(SerDeInstanceUtils.java:56)
at com.huawei.dff.functions.runtime.io.yuanrong.YuanRongSource.lambda$processDeseqialize$0(YuanRongSource.java:229)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)
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