我需要你的帮助。我不知道这里怎么了。
当我启动javaapp从elasticsearch获取数据时，我得到了以下classcastexception：

ElasticDBPersistanceImp | findQueryField failed for templateId
java.lang.ClassCastException: org.elasticsearch.cluster.metadata.MappingMetadata cannot be cast to org.elasticsearch.cluster.metadata.MappingMetaData
    at com.initka.bprocess.hforms_formlist.persistance.impl.elastic.ElasticDBPersistanceImpl.getAllFields(ElasticDBPersistanceImpl.java:251) ~[classes/:?]
    at com.initka.bprocess.hforms_formlist.persistance.impl.elastic.ElasticDBPersistanceImpl.findQueryField(ElasticDBPersistanceImpl.java:226) ~[classes/:?]
    at com.initka.bprocess.hforms_formlist.persistance.impl.elastic.ElasticDBPersistanceImpl.getFieldDataDistict(ElasticDBPersistanceImpl.java:163) ~[classes/:?]
    at com.initka.bprocess.hforms_formlist.startup.FormListSecurityServiceImpl.getTemplateIds(FormListSecurityServiceImpl.java:40) ~[classes/:?]
    at com.initka.bprocess.hforms_formlist.startup.FormListSecurityServiceImpl.<init>(FormListSecurityServiceImpl.java:21) ~[classes/:?]
    at com.initka.bprocess.hforms_formlist.startup.HformsFormlistFactoryImpl.<init>(HformsFormlistFactoryImpl.java:55) ~[classes/:?]
    at com.initka.bprocess.hforms_formlist.startup.Booter.startTenant(Booter.java:70) ~[classes/:?]
    at com.initka.bprocess.hforms_formlist.startup.Booter.lambda$0(Booter.java:45) ~[classes/:?]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]

我使用的代码在这里的文档中提供https://www.elastic.co/guide/en/elasticsearch/client/java-rest/master/java-rest-high-get-mappings.html
所以稍加修改，它看起来像：

GetMappingsResponse mapping1 = dbManager.getFormlistDBConnection().indices().getMapping(getMappingsRequest, RequestOptions.DEFAULT);
    Map<String, MappingMetaData> mappings2 = mapping1.mappings();
    MappingMetaData mappingMetaData = mappings2.get(indexName);
    Map<String, Object> sourceAsMap = mappingMetaData.getSourceAsMap();

也许你们中有人知道这里出了什么问题？
提前谢谢