ServiceLoader 加载不到类

基于es5.6.2版本，在使用RestHighLevelClient时，在服务器上无法进行初始化，报错如下：
Caused by: java.util.ServiceConfigurationError: org.elasticsearch.plugins.spi.NamedXContentProvider: Provider org.elasticsearch.join.spi.ParentJoinNamedXContentProviderorg.elasticsearch.search.aggregations.matrix.spi.MatrixStatsNamedXContentProviderorg.elasticsearch.join.spi.ParentJoinNamedXContentProvider not found
at java.util.ServiceLoader.fail(ServiceLoader.java:239) ~[?:1.8.0_131]
at java.util.ServiceLoader.access$300(ServiceLoader.java:185) ~[?:1.8.0_131]
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:372) ~[?:1.8.0_131]
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404) ~[?:1.8.0_131]
at java.util.ServiceLoader$1.next(ServiceLoader.java:480) ~[?:1.8.0_131]
at org.elasticsearch.client.RestHighLevelClient.getProvidedNamedXContents(RestHighLevelClient.java:596) ~[stormjar.jar:?]
at org.elasticsearch.client.RestHighLevelClient.<init>(RestHighLevelClient.java:187) ~[stormjar.jar:?]
at org.elasticsearch.client.RestHighLevelClient.<init>(RestHighLevelClient.java:177) ~[stormjar.jar:?]


一开始以为是类没有加载进入JVM,但检查后发现是有加载进去的！！