报错：
[parent] Data too large, data for [<http_request>] would be [10204126938/9.5gb], which is larger than the limit of [10200547328/9.5gb], real usage: [10204126424/9.5gb], new bytes reserved: [514/514b], usages [request=0/0b, fielddata=942936/920.8kb
原因：ES堆内存不足
解决方法：
1、修改jvm.options文件，调大堆内存；
2、若堆内存已设置到32G，增加集群节点。
