我刚开始使用DSE图表（之前对Titan有一点了解）。我已经使用Datastax 5.0.3设置了DSE图。
尝试为属性创建搜索索引时，我遇到以下异常。
schema.vertexLabel('Employee').index('search').search().by('story').asText().add()
org.apache.tinkerpop.gremlin.driver.exception.ResponseException: Cannot create search index with workload: Analytics
我能够创建属性，物化和二级索引。但是当我尝试创建搜索索引时，我正面临着这个问题。
我意识到在启动我的单节点群集时，我不得不关闭-s标志，因为这不会让我启动DSE服务器。第一次启动节点时出现了一些异常我不应该根据某些Datastax开发人员QAs设置-s标志。
entrypoint: ["/usr/local/bin/dse-entrypoint", "-k", "-g"]
现在，当我尝试启用-s标志时，我的节点没有出现，我收到以下异常。
dse | WARN 12:54:28,038 CLibrary.java:163 - Unable to lock JVM memory (ENOMEM). This can result in part of the JVM being swapped out, especially with mmapped I/O enabled. Increase RLIMIT_MEMLOCK or run Cassandra as root.
dse | WARN 12:54:28,038 StartupChecks.java:118 - jemalloc shared library could not be preloaded to speed up memory allocations
dse | WARN 12:54:28,039 StartupChecks.java:150 - JMX is not enabled to receive remote connections. Please see cassandra-env.sh for more info.
dse | WARN 12:54:28,047 SigarLibrary.java:174 - Cassandra server running in degraded mode. Is swap disabled? : false, Address space adequate? : true, nofile limit adequate? : true, nproc limit adequate? : true
dse | ERROR 12:54:28,710 CassandraDaemon.java:709 - Cannot start node if snitch's data center (SearchGraphAnalytics) differs from previous data center (GraphAnalytics). Please fix the snitch configuration, decommission and rebootstrap this node or use the flag -Dcassandra.ignore_dc=true.
dse | INFO 12:54:28,717 DseDaemon.java:556 - DSE shutting down...
dse | INFO 12:54:28,718 PluginManager.java:104 - All plugins are stopped.
dse | Oct 27, 2016 12:54:28 PM org.apache.coyote.http11.Http11Protocol pause
dse | INFO: Pausing Coyote HTTP/1.1 on http-172.19.0.3-8983
dse | Oct 27, 2016 12:54:29 PM org.apache.catalina.core.StandardService stop
dse | INFO: Stopping service Solr
dse | INFO 12:54:29,907 SolrHttpAuditLogFilter.java:225 - Shutting down Solr audit logging filter
dse | INFO 12:54:29,924 RepeatablePOSTQueryFilter.java:81 - Shutting down com.datastax.bdp.search.solr.RepeatablePOSTQueryFilter filter
dse | Oct 27, 2016 12:54:29 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
dse | SEVERE: The web application [/solr] appears to have started a thread named [Thread-3] but has failed to stop it. This is very likely to create a memory leak.
dse | Oct 27, 2016 12:54:29 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
dse | SEVERE: The web application [/solr] appears to have started a thread named [NonPeriodicTasks:1] but has failed to stop it. This is very likely to create a memory leak.
dse | Oct 27, 2016 12:54:29 PM org.apache.coyote.http11.Http11Protocol destroy
dse | INFO: Stopping Coyote HTTP/1.1 on http-172.19.0.3-8983
dse | INFO 12:54:33,191 MessageServer.java:129 - internode-messaging message server finished shutting down.
dse | INFO 12:54:37,209 MessageServer.java:129 - internode-messaging message server finished shutting down.
dse | Exception in thread "Daemon shutdown" java.lang.AssertionError
dse | at org.apache.cassandra.gms.Gossiper.addLocalApplicationStateInternal(Gossiper.java:1427)
dse | at org.apache.cassandra.gms.Gossiper.addLocalApplicationStates(Gossiper.java:1451)
dse | at org.apache.cassandra.gms.Gossiper.addLocalApplicationState(Gossiper.java:1441)
dse | at com.datastax.bdp.gms.DseState.setActiveStatusSync(DseState.java:241)
dse | at com.datastax.bdp.server.DseDaemon.preStop(DseDaemon.java:576)
dse | at com.datastax.bdp.server.DseDaemon.safeStop(DseDaemon.java:587)
dse | at com.datastax.bdp.server.DseDaemon.lambda$getShutdownHook$226(DseDaemon.java:905)
dse | at java.lang.Thread.run(Thread.java:745)
请建议我如何纠正这种情况，并能够将searchIndex添加到我的属性中。
答案 0 :(得分：1)
此错误表明您正在启动群集，其名称与群集在先前配置/启动时所期望的名称不同。
默认情况下，除非您覆盖cassandra.yaml文件中的群集名称，否则您的群集将使用基于您启用的工作负载的名称启动，即-s，-t。在您的情况下，由于您将群集作为Analytics群集启动，然后将其作为SearchAnalytics群集重新启动，因此群集名称默认为新群集名称，该名称与旧群集名称不匹配。
这里最简单的方法是擦除cassandra提交日志，缓存和数据目录，然后重新启动节点。这将从系统表中清除旧的群集名称，并允许群集启动。执行此操作将清除群集中的所有数据。