报错信息

java.lang.IllegalArgumentException: Comparison method violates its general contract!
	at java.util.TimSort.mergeHi(TimSort.java:899)
	at java.util.TimSort.mergeAt(TimSort.java:516)
	at java.util.TimSort.mergeForceCollapse(TimSort.java:457)
	at java.util.TimSort.sort(TimSort.java:254)
	at java.util.Arrays.sort(Arrays.java:1438)
	at com.bm.fastjson.util.TypeUtils.computeGetters(TypeUtils.java:1880)
	at com.bm.fastjson.util.TypeUtils.buildBeanInfo(TypeUtils.java:1820)
	at com.bm.fastjson.serializer.SerializeConfig.createJavaBeanSerializer(SerializeConfig.java:113)
	at com.bm.fastjson.serializer.SerializeConfig.getObjectWriter(SerializeConfig.java:821)
	at com.bm.fastjson.serializer.SerializeConfig.getObjectWriter(SerializeConfig.java:440)
	at com.bm.fastjson.serializer.JSONSerializer.getObjectWriter(JSONSerializer.java:448)
	at com.bm.fastjson.serializer.ListSerializer.write(ListSerializer.java:128)
	at com.bm.fastjson.serializer.JSONSerializer.write(JSONSerializer.java:312)
	at com.bm.fastjson.JSON.toJSONString(JSON.java:793)
	at com.bm.fastjson.JSON.toJSONString(JSON.java:731)
	at com.bm.fastjson.JSON.toJSONString(JSON.java:688)

问题原因:fastjson的一个bug

解决方式:升级fastjson到1.2.79版本(https://github.com/alibaba/fastjson/releases/tag/1.2.79

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