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Java AggregationBuilders抛出错误JsonGenerationException

Java AggregationBuilders抛出错误JsonGenerationException,java,api,elasticsearch,Java,Api,elasticsearch,我正在使用ElasticSearchAPI(elasticsearch5.2.1.jar)进行如下聚合查询: StatsAggregationBuilder statAggBuild = AggregationBuilders.stats("agg").field("ipAddress"); 这将返回以下异常 { "error" : "JsonGenerationException[Can not write a field name, expecting a value]"} 我在这里做错

我正在使用ElasticSearchAPI(elasticsearch5.2.1.jar)进行如下聚合查询:

StatsAggregationBuilder statAggBuild = AggregationBuilders.stats("agg").field("ipAddress");
这将返回以下异常

{ "error" : "JsonGenerationException[Can not write a field name, expecting a value]"}

我在这里做错了什么吗?

在请求中设置此对象时,不会引起任何问题。它按预期返回响应

它看起来是toString方法中存在的实际问题,当我们试图查看项目中存在的内容时,它会抛出错误