jestElasticSearchRestTemplate.delete(criteriaQuery,UserEntity.class) throw exception

[KinYu668]

hi,
I test the jestElasticSearchRestTemplate.delete(criteriaQuery,UserEntity.class) core ,throw this Exception :
1.(debug mode) NoHttpResponseException :The target server failed to respond
2.(no debug mode)ElasticsearchException:Cannot execute jest action,response code:404,error:404 not found ,message: null
code:
Criteria criteria=new Criteria("name");
criteria.contains("20170930");
CriteriaQuery criteriaQuery = new criteriaQuery(criteria);
jestElasticSearchRestTemplate.delete(criteriaQuery,UserEntity.class);

how to deal with it?Is is a Bug?