在SOLRCloud中启用LTR（solr版本8.2）

我正在尝试与solr cloud合作，我必须利用学习为我的项目对模型和功能进行排名。但我面临着SolrCore初始化失败的问题

techproducts\u shard1\u replica\u n2:org.apache.solr.common.SolrException:org.apache.solr.common.SolrException:未能创建类型为org.apache.solr.ltr.store.rest.ManagedModelStore的新ManagedResource/schema/model存储，原因是：org.apache.solr.common.SolrException:org.apache.solr.ltr.model.model异常：模型类型不存在org.apache.solr.ltr.model.LinearModel techproducts\u shard2\u replica\u n6:org.apache.solr.common.SolrException:org.apache.solr.common.SolrException:未能创建类型为org.apache.solr.ltr.store.rest.ManagedModelStore的新ManagedResource/schema/model存储，原因是：org.apache.solr.common.SolrException:org.apache.solr.ltr.model.model异常：模型类型不存在org.apache.solr.ltr.model.LinearModel 请查看日志以了解更多信息

以下是solr日志：-

**2019-12-04 12:44:05.760 ERROR (searcherExecutor-15-thread-1-processing-n:192.168.137.1:8983_solr x:techproducts_shard1_replica_n2 c:techproducts s:shard1 r:core_node5) [c:techproducts s:shard1 r:core_node5 x:techproducts_shard1_replica_n2] o.a.s.h.RequestHandlerBase java.lang.NullPointerException
    at org.apache.solr.handler.component.SearchHandler.initComponents(SearchHandler.java:183)
    at org.apache.solr.handler.component.SearchHandler.getComponents(SearchHandler.java:203)
    at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:260)
    at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)
    at org.apache.solr.core.SolrCore.execute(SolrCore.java:2578)
    at org.apache.solr.core.QuerySenderListener.newSearcher(QuerySenderListener.java:74)
    at org.apache.solr.core.SolrCore.lambda$getSearcher$18(SolrCore.java:2344)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:209)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
2019-12-04 12:44:05.760 ERROR (searcherExecutor-14-thread-1-processing-n:192.168.137.1:8983_solr x:techproducts_shard2_replica_n6 c:techproducts s:shard2 r:core_node8) [c:techproducts s:shard2 r:core_node8 x:techproducts_shard2_replica_n6] o.a.s.h.RequestHandlerBase java.lang.NullPointerException
    at org.apache.solr.handler.component.SearchHandler.initComponents(SearchHandler.java:183)
    at org.apache.solr.handler.component.SearchHandler.getComponents(SearchHandler.java:203)
    at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:260)
    at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)
    at org.apache.solr.core.SolrCore.execute(SolrCore.java:2578)
    at org.apache.solr.core.QuerySenderListener.newSearcher(QuerySenderListener.java:74)
    at org.apache.solr.core.SolrCore.lambda$getSearcher$18(SolrCore.java:2344)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:209)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

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匹配Solr版本和zookeeper的兼容性。。。。 对于Solr 8.2.0，请使用zookepeer 3.5.6