在 SOLRCloud 中启用 LTR（solr version8.2）

Question

我正在尝试使用 solr-cloud，我必须使用学习来对我的项目的模型和功能进行排名。但我正面临 SolrCore 初始化失败

的问题

techproducts_shard1_replica_n2：org.apache.solr.common.SolrException：org.apache.solr.common.SolrException：无法创建类型为 org.apache.solr.ltr.store.rest.ManagedModelStore 的新 ManagedResource /schema/model-store，原因是：org.apache.solr.common.SolrException: org.apache.solr.ltr.model.ModelException: 模型类型不存在 org.apache.solr.ltr.model.LinearModel techproducts_shard2_replica_n6：org.apache.solr.common.SolrException：org.apache.solr.common.SolrException：无法创建类型为 org.apache.solr.ltr.store.rest.ManagedModelStore 的新 ManagedResource /schema/model-store，原因是：org.apache.solr.common.SolrException：org.apache.solr.ltr.model.ModelException：模型类型不存在 org.apache.solr.ltr.model.LinearModel 请检查您的日志以获取更多信息

这些是 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$getSearcher(SolrCore.java:2344)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute[=10=](ExecutorUtil.java:209)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$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$getSearcher(SolrCore.java:2344)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute[=10=](ExecutorUtil.java:209)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

Answer 1

匹配Solr版本和zookeeper的兼容性.... 对于 Solr 8.2.0 使用 zookepeer 3.5.6

在 SOLRCloud 中启用 LTR（solr version8.2）

Enabling LTR in SOLRCloud (solr version8.2)

lucene

solr

solrcloud

apache-zookeeper