我正在使用以下代码加载Titan：
TitanFactory.Builder config = TitanFactory.build(); config.set("storage.backend", "berkeleyje"); config.set("storage.directory", DIRECTORY); //config.set("storage.conf-file", "file:////" + DIRECTORY + "/cassandra/cassandra.yaml"); config.set("index." + INDEX_NAME + ".backend", "elasticsearch"); config.set("index." + INDEX_NAME + ".DIRECTORY", DIRECTORY + File.separator + "es"); config.set("index." + INDEX_NAME + ".elasticsearch.local-mode", true); config.set("index." + INDEX_NAME + ".elasticsearch.client-only", false); graph = config.open();
用gradle加载依赖项：
compile group: 'com.thinkaurelius.titan', name: 'titan-all', version: '1.0.0'
我的项目目录是：
/ home / ray / IdeaProjects / BAG-Graph数据库的拜占庭容错体系结构/
我的泰坦在该项目目录的“ TITAN”文件夹中。这就是我在Directory变量中设置的内容。
仍然在启动时总是崩溃：
22:56:01.420 [main] DEBUG c.t.t.d.b.BerkeleyJEStoreManager - Opened database system_properties java.lang.Throwable: null at com.thinkaurelius.titan.diskstorage.berkeleyje.BerkeleyJEStoreManager.openDatabase(BerkeleyJEStoreManager.java:172) [titan-berkeleyje-1.0.0.jar:na] at com.thinkaurelius.titan.diskstorage.berkeleyje.BerkeleyJEStoreManager.openDatabase(BerkeleyJEStoreManager.java:34) [titan-berkeleyje-1.0.0.jar:na] at com.thinkaurelius.titan.diskstorage.keycolumnvalue.keyvalue.OrderedKeyValueStoreManagerAdapter.openDatabase(OrderedKeyValueStoreManagerAdapter.java:76) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.diskstorage.keycolumnvalue.keyvalue.OrderedKeyValueStoreManagerAdapter.openDatabase(OrderedKeyValueStoreManagerAdapter.java:69) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.diskstorage.keycolumnvalue.keyvalue.OrderedKeyValueStoreManagerAdapter.openDatabase(OrderedKeyValueStoreManagerAdapter.java:25) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.diskstorage.Backend.getStandaloneGlobalConfiguration(Backend.java:449) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1322) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:94) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:84) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory$Builder.open(TitanFactory.java:139) [titan-core-1.0.0.jar:na] at main.java.com.bag.server.database.TitanDatabaseAccess.start(TitanDatabaseAccess.java:56) [main/:na] at main.java.com.bag.server.TestServer.<init>(TestServer.java:105) [main/:na] at main.java.com.bag.server.TestServer.main(TestServer.java:428) [main/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_112] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_112] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_112] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_112] at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:na] 22:56:01.423 [main] DEBUG c.t.t.d.k.k.OrderedKeyValueStoreAdapter - Used key length 0 for database system_properties 22:56:01.429 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader$LoaderConfiguration - Option loading enabled by default 22:56:01.431 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Added preferred classloader to config option loader chain: sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.431 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Added thread context classloader to config option loader chain: sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.431 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Added caller classloader to config option loader chain: sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.442 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded class com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager with loader sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.442 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Located functioning classloader sun.misc.Launcher$AppClassLoader@63e31ee; using it for remaining classload attempts 22:56:01.447 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded class com.thinkaurelius.titan.diskstorage.cassandra.astyanax.AstyanaxStoreManager with selected loader sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.447 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded class com.thinkaurelius.titan.diskstorage.cassandra.AbstractCassandraStoreManager with selected loader sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.452 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded class com.thinkaurelius.titan.diskstorage.cassandra.thrift.CassandraThriftStoreManager with selected loader sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.459 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded class com.thinkaurelius.titan.diskstorage.es.ElasticSearchIndex with selected loader sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.460 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Unable to load class com.thinkaurelius.titan.diskstorage.solr.SolrIndex with selected loader sun.misc.Launcher$AppClassLoader@63e31ee java.lang.ClassNotFoundException: com.thinkaurelius.titan.diskstorage.solr.SolrIndex at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_112] at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_112] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_112] at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_112] at java.lang.Class.forName0(Native Method) ~[na:1.8.0_112] at java.lang.Class.forName(Class.java:348) ~[na:1.8.0_112] at com.thinkaurelius.titan.core.util.ReflectiveConfigOptionLoader.loadStandard(ReflectiveConfigOptionLoader.java:136) ~[titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.diskstorage.configuration.ConfigNamespace.getChild(ConfigNamespace.java:68) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.diskstorage.configuration.ConfigElement.parse(ConfigElement.java:180) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.diskstorage.configuration.BasicConfiguration.getAll(BasicConfiguration.java:80) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1327) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:94) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:84) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory$Builder.open(TitanFactory.java:139) [titan-core-1.0.0.jar:na] at main.java.com.bag.server.database.TitanDatabaseAccess.start(TitanDatabaseAccess.java:56) [main/:na] at main.java.com.bag.server.TestServer.<init>(TestServer.java:105) [main/:na] at main.java.com.bag.server.TestServer.main(TestServer.java:428) [main/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_112] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_112] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_112] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_112] at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:na] 22:56:01.462 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded class com.thinkaurelius.titan.diskstorage.log.kcvs.KCVSLog with selected loader sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.463 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded class com.thinkaurelius.titan.diskstorage.log.kcvs.KCVSLogManager with selected loader sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.463 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded class com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration with selected loader sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.464 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded class com.thinkaurelius.titan.graphdb.database.idassigner.placement.SimpleBulkPlacementStrategy with selected loader sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.465 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded class com.thinkaurelius.titan.graphdb.database.idassigner.VertexIDAssigner with selected loader sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.465 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded class com.thinkaurelius.titan.diskstorage.berkeleyje.BerkeleyJEStoreManager with selected loader sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.465 [main] INFO c.t.t.c.u.ReflectiveConfigOptionLoader - Loaded and initialized config classes: 11 OK out of 12 attempts in PT0.035S 22:56:01.466 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Added preferred classloader to config option loader chain: sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.466 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Added thread context classloader to config option loader chain: sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.466 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Added caller classloader to config option loader chain: sun.misc.Launcher$AppClassLoader@63e31ee 22:56:01.493 [main] DEBUG org.reflections.Reflections - going to scan these urls: file:/home/ray/IdeaProjects/BAG%20-%20Byzantine%20fault-tolerant%20Architecture%20for%20Graph%20database/build/classes/main/ 22:56:01.497 [main] DEBUG org.reflections.Reflections - could not scan file main/java/com/bag/server/TestServer.class in url file:/home/ray/IdeaProjects/BAG%20-%20Byzantine%20fault-tolerant%20Architecture%20for%20Graph%20database/build/classes/main/ with scanner TypeAnnotationsScanner 22:56:01.497 [main] DEBUG org.reflections.Reflections - could not scan file main/java/com/bag/server/TestServer.class in url file:/home/ray/IdeaProjects/BAG%20-%20Byzantine%20fault-tolerant%20Architecture%20for%20Graph%20database/build/classes/main/ with scanner SubTypesScanner 22:56:01.497 [main] DEBUG org.reflections.Reflections - could not scan file main/java/com/bag/server/ConflictHandler.class in url file:/home/ray/IdeaProjects/BAG%20-%20Byzantine%20fault-tolerant%20Architecture%20for%20Graph%20database/build/classes/main/ with scanner TypeAnnotationsScanner 22:56:01.498 [main] DEBUG org.reflections.Reflections - could not scan file main/java/com/bag/server/ConflictHandler.class in url file:/home/ray/IdeaProjects/BAG%20-%20Byzantine%20fault-tolerant%20Architecture%20for%20Graph%20database/build/classes/main/ with scanner SubTypesScanner 22:56:01.502 [main] DEBUG org.reflections.Reflections - could not scan file main/java/com/bag/server/database/Neo4jDatabaseAccess.class in url file:/home/ray/IdeaProjects/BAG%20-%20Byzantine%20fault-tolerant%20Architecture%20for%20Graph%20database/build/classes/main/ with scanner TypeAnnotationsScanner 22:56:01.503 [main] DEBUG org.reflections.Reflections - could not scan file main/java/com/bag/server/database/Neo4jDatabaseAccess.class in url file:/home/ray/IdeaProjects/BAG%20-%20Byzantine%20fault-tolerant%20Architecture%20for%20Graph%20database/build/classes/main/ with scanner SubTypesScanner 22:56:01.506 [main] DEBUG org.reflections.Reflections - could not scan file main/java/com/bag/server/database/OrientDBDatabaseAccess.class in url file:/home/ray/IdeaProjects/BAG%20-%20Byzantine%20fault-tolerant%20Architecture%20for%20Graph%20database/build/classes/main/ with scanner TypeAnnotationsScanner 22:56:01.506 [main] DEBUG org.reflections.Reflections - could not scan file main/java/com/bag/server/database/OrientDBDatabaseAccess.class in url file:/home/ray/IdeaProjects/BAG%20-%20Byzantine%20fault-tolerant%20Architecture%20for%20Graph%20database/build/classes/main/ with scanner SubTypesScanner 22:56:01.508 [main] DEBUG org.reflections.Reflections - could not scan file main/java/com/bag/client/TestClient.class in url file:/home/ray/IdeaProjects/BAG%20-%20Byzantine%20fault-tolerant%20Architecture%20for%20Graph%20database/build/classes/main/ with scanner TypeAnnotationsScanner 22:56:01.508 [main] DEBUG org.reflections.Reflections - could not scan file main/java/com/bag/client/TestClient.class in url file:/home/ray/IdeaProjects/BAG%20-%20Byzantine%20fault-tolerant%20Architecture%20for%20Graph%20database/build/classes/main/ with scanner SubTypesScanner 22:56:01.516 [main] INFO org.reflections.Reflections - Reflections took 22 ms to scan 1 urls, producing 6 keys and 13 values 22:56:01.518 [main] DEBUG c.t.t.c.u.ReflectiveConfigOptionLoader - Preloaded 0 config option(s) via Reflections (0 class(es) with errors) 22:56:01.518 [main] DEBUG c.t.t.d.c.BasicConfiguration - Ignored configuration entry for index.search.DIRECTORY since it does not map to an option java.lang.IllegalArgumentException: Unknown configuration element in namespace [root.index]: DIRECTORY at com.google.common.base.Preconditions.checkArgument(Preconditions.java:145) ~[guava-18.0.jar:na] at com.thinkaurelius.titan.diskstorage.configuration.ConfigElement.parse(ConfigElement.java:181) ~[titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.diskstorage.configuration.BasicConfiguration.getAll(BasicConfiguration.java:80) ~[titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1327) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:94) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:84) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory$Builder.open(TitanFactory.java:139) [titan-core-1.0.0.jar:na] at main.java.com.bag.server.database.TitanDatabaseAccess.start(TitanDatabaseAccess.java:56) [main/:na] at main.java.com.bag.server.TestServer.<init>(TestServer.java:105) [main/:na] at main.java.com.bag.server.TestServer.main(TestServer.java:428) [main/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_112] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_112] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_112] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_112] at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:na] 22:56:01.557 [main] DEBUG c.t.t.d.c.BasicConfiguration - Ignored configuration entry for index.search.DIRECTORY since it does not map to an option java.lang.IllegalArgumentException: Unknown configuration element in namespace [root.index]: DIRECTORY at com.google.common.base.Preconditions.checkArgument(Preconditions.java:145) ~[guava-18.0.jar:na] at com.thinkaurelius.titan.diskstorage.configuration.ConfigElement.parse(ConfigElement.java:181) ~[titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.diskstorage.configuration.BasicConfiguration.getAll(BasicConfiguration.java:80) ~[titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1383) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:94) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:84) [titan-core-1.0.0.jar:na] at com.thinkaurelius.titan.core.TitanFactory$Builder.open(TitanFactory.java:139) [titan-core-1.0.0.jar:na] at main.java.com.bag.server.database.TitanDatabaseAccess.start(TitanDatabaseAccess.java:56) [main/:na] at main.java.com.bag.server.TestServer.<init>(TestServer.java:105) [main/:na] at main.java.com.bag.server.TestServer.main(TestServer.java:428) [main/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_112] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_112] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_112] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_112] at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:na] 22:56:01.563 [main] DEBUG c.t.t.d.b.BerkeleyJEStoreManager - Removed database system_properties 22:56:01.613 [main] INFO c.t.t.g.c.GraphDatabaseConfiguration - Generated unique-instance-id=c0a8000d21256-Laptop1 22:56:01.641 [main] INFO c.t.titan.diskstorage.Backend - Configuring index [search] Exception in thread "main" java.lang.IllegalArgumentException: Could not instantiate implementation: com.thinkaurelius.titan.diskstorage.es.ElasticSearchIndex at com.thinkaurelius.titan.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:55) at com.thinkaurelius.titan.diskstorage.Backend.getImplementationClass(Backend.java:473) at com.thinkaurelius.titan.diskstorage.Backend.getIndexes(Backend.java:460) at com.thinkaurelius.titan.diskstorage.Backend.<init>(Backend.java:147) at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.getBackend(GraphDatabaseConfiguration.java:1805) at com.thinkaurelius.titan.graphdb.database.StandardTitanGraph.<init>(StandardTitanGraph.java:123) at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:94) at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:84) at com.thinkaurelius.titan.core.TitanFactory$Builder.open(TitanFactory.java:139) at main.java.com.bag.server.database.TitanDatabaseAccess.start(TitanDatabaseAccess.java:56) at main.java.com.bag.server.TestServer.<init>(TestServer.java:105) at main.java.com.bag.server.TestServer.main(TestServer.java:428) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.thinkaurelius.titan.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:44) ... 16 more Caused by: java.lang.NoSuchFieldError: LUCENE_3_6 at org.elasticsearch.Version.<clinit>(Version.java:43) at com.thinkaurelius.titan.diskstorage.es.ElasticSearchIndex.checkExpectedClientVersion(ElasticSearchIndex.java:1059) at com.thinkaurelius.titan.diskstorage.es.ElasticSearchIndex.<init>(ElasticSearchIndex.java:186) ... 21 more
我的gradle文件：
testCompile group: 'junit', name: 'junit', version: '4.11' compile files('libs/BFT-SMaRt.jar') compile "org.neo4j:neo4j-enterprise:${neo4jVersion}" compile group: 'commons-codec', name: 'commons-codec', version: '1.5' compile group: 'io.netty', name: 'netty-all', version: '4.0.36.Final' compile group: 'com.thinkaurelius.titan', name: 'titan-all', version: '1.0.0' compile group: 'com.sparsity', name: 'sparkseejava', version: '5.2.0' compile group: 'com.orientechnologies', name: 'orientdb-graphdb', version: '2.2.11' compile group: 'org.jboss.spec.javax.ws.rs', name: 'jboss-jaxrs-api_2.0_spec', version: '1.0.0.Final' compile group: 'com.esotericsoftware', name: 'kryo', version: '4.0.0' compile 'com.intellij:annotations:+@jar' compile group: 'org.apache.tinkerpop', name: 'gremlin-core', version: '3.0.0.M9-incubating'
您应该对Titan依赖项更加具体，以免出现意外的工件。代替使用titan-all，尝试这样的事情：
titan-all
compile group: 'com.thinkaurelius.titan', name: 'titan-berkeleyje', version: '1.0.0' compile group: 'com.thinkaurelius.titan', name: 'titan-es', version: '1.0.0'
您不需要gremlin-core显式地包含它titan-core，因为它是的依赖项，但是，如果您添加了它，则应使其与Titan 1.0使用的TinkerPop版本保持一致：
gremlin-core
titan-core
compile group: 'org.apache.tinkerpop', name: 'gremlin-core', version: '3.0.1-incubating'
更新
您之前的失败尝试可能创建了一个存储在下的无效图实例DIRECTORY。DIRECTORY在尝试使用同一目录创建新图形之前，必须递归删除。
DIRECTORY
Elasticsearch索引后端不适用于index.search.DIRECTORY配置（请注意情况）。这是堆栈跟踪的相关部分：
index.search.DIRECTORY
忽略index.search.DIRECTORY的配置条目，因为它没有映射到选项java.lang.IllegalArgumentException：名称空间[root.index]中的未知配置元素：DIRECTORY
您可以在Titan文档的第22章中阅读有关各种Elasticsearch配置选项的更多信息。
可以考虑使用Lucene代替Elasticsearch 。它的配置看起来与BerkeleyJE存储类似，并且都非常适合单机Titan。
TitanFactory.Builder config = TitanFactory.build(); config.set("storage.backend", "berkeleyje"); config.set("storage.directory", DIRECTORY + File.separator + "berkeleyje"); config.set("index." + INDEX_NAME + ".backend", "lucene"); config.set("index." + INDEX_NAME + ".directory", DIRECTORY + File.separator + "lucene"); graph = config.open();
还build.gradle使用lucene的依赖关系进行更新：
build.gradle
compile group: 'com.thinkaurelius.titan', name: 'titan-berkeleyje', version: '1.0.0' compile group: 'com.thinkaurelius.titan', name: 'titan-lucene', version: '1.0.0'
我还建议您首先尝试构建没有Neo4j，OrientDB，Sparksee和其他非Titan依赖项的Titan项目，以确保您有一个简单的项目，且没有任何依赖项冲突。
